Sim vs Claude Cowork
Sim is the open-source AI workspace where teams build, deploy, and manage AI agents visually, conversationally, or with code. Here is how Sim compares to Claude Cowork on platform architecture, AI capabilities, integrations, pricing, security, and support. Every fact below is sourced and dated.
Sim is an open-source AI workspace for building, deploying, and managing AI agents. This page compares Sim to Claude Cowork across platform architecture, AI capabilities, integrations, pricing, security and compliance, observability, and support, using sourced, dated facts for buyers evaluating both platforms.
What is Sim?
Sim is the open-source AI workspace where teams build, deploy, and manage AI agents, connecting 1,000+ integrations and every major LLM to automate real work visually, conversationally, or with code.
What is Claude Cowork?
Claude Cowork is Anthropic's autonomous desktop agent, built into the Claude Desktop app. Give it a goal in plain language and it works across your local files, folders, and apps (via connectors, a browser, and direct screen control) to finish a multi-step task end-to-end. It is not a visual workflow builder or automation/integration platform like Sim, n8n, or Zapier. It's a session-based agent that only runs while the desktop app is open and the computer is awake.
Sim vs Claude Cowork: feature-by-feature comparison
CompareSim vs Claude Cowork
Sim
Claude Cowork
Platform
Builder type
Sim
Visual canvas, chat, or codeVisual drag-and-drop canvas, natural-language (Chat), or code (API/SDK)
Claude Cowork
Conversational agent, not a visual builderConversational/prompt-driven autonomous agent (not a visual workflow builder). The user describes a goal in natural language in the Cowork tab of Claude Desktop. Claude analyzes the request, creates a plan, and executes across files, apps, and connectors without step-by-step drag-and-drop configuration.
Learning curve
Sim
Low, plus natural-language Chat for non-technical usersLow for visual building; natural-language Chat surface (with a workflow-scoped Copilot) for non-technical builders. Chat lets users describe a workflow in plain language and have Sim scaffold or edit it; the visual canvas requires no code to connect blocks.
Claude Cowork
Low. Built for non-technical usersLow. Designed for non-technical knowledge workers. Marketed for knowledge workers who need to handle repetitive, multi-step tasks involving files, documents, and data without technical or coding expertise. Interaction is purely natural-language prompts.
Self-hosting
Deployment options
Sim
Cloud-hosted or self-hosted, no mid-tier VPC optionCloud-hosted (managed, multi-tenant SaaS) or self-hosted (Docker/Kubernetes). No documented managed single-tenant/VPC hosting tier in between. The Enterprise plan's only hosting-related row in the pricing comparison table is a boolean "Self Hosting" flag; there is no dedicated-instance/VPC offering.
Claude Cowork
Desktop app (Mac/Windows/Linux beta) + mobileClaude Desktop app (macOS, Windows, Linux beta); companion mobile messaging while desktop app stays active. Tasks execute in an isolated virtual machine on the user's computer. Pro/Max users can message and monitor from a phone while the desktop app remains open.
Templates
Sim
Claude Cowork
Plugin marketplace + OSS templatesPlugin marketplace + open-source plugin templates. Plugins bundle skills, connectors, sub-agents, and slash commands into installable packages. Anthropic provides starter templates and an open-source knowledge-work-plugins repo.
License
Sim
Apache 2.0Apache License 2.0
Claude Cowork
Closed-source proprietary productProprietary (closed-source SaaS/desktop product). Claude Cowork is a commercial Anthropic product bundled into paid Claude plans. Not open source, unlike Sim.
Environment promotion
Sim
Yes: fork a whole workspace into a dev/qa/prod-style child, diff it, and promote or roll back changes in either direction. Credential and env-var remapping is required before every promote, so secrets are never silently copied across environments. Gated to Enterprise plan on hosted Sim, or a FORKING_ENABLED flag on self-hosted deployments.
Claude Cowork
No dev/staging/prod conceptN/A: no dev/qa/prod concept exists. Cowork is a single-session desktop agent, not a deployable multi-stage application. There is no environment fork/promote concept.
Version control
Sim
Deployment rollback plus Copilot edit diff/revertDeployed-version history with rollback for every workflow; server-persisted checkpoint/revert and visual diff (accept/reject) specifically for Copilot AI edits. Manual drag-and-drop undo/redo is client-side/localStorage only (capped at 100 ops, 5 stacks), not server-synced across devices. Deployment history does not include an arbitrary version-to-version diff tool, and knowledge base documents have no version history.
Claude Cowork
No native version controlNot documented, no native version control. Plugins and skills are file-based (SKILL.md and package files), so a user could track them in an external VCS, but there is no built-in versioning, diffing, or rollback for tasks or plugins.
Realtime collaboration
Sim
Claude Cowork
No: Claude Cowork sessions run for a single user and cannot be shared with others in real time. There is no live multi-cursor, multi-selection editing of the same Cowork task. The closest feature, 'Shared Workspaces,' lets humans and the agent work on shared cloud files together, but it coordinates through file locking (the agent locks a file while editing, then releases it), not live synced editing.
Native file storage
Sim
Yes: a native Files area with folder hierarchy, link-based sharing (public, password, email OTP, or SSO auth), and a workspace-level Recently Deleted view covering workflows, tables, knowledge bases, files, and folders. Admins can restrict which share-auth modes (public/password/email/SSO) a permission group is allowed to use.
Claude Cowork
No: Claude Cowork works on the user's connected local files/folders (via the Desktop app) and, as of the current beta, can also execute tasks remotely in an isolated environment on Anthropic's servers, saving sessions and files to the user's Claude account; it is not a native cloud file-storage product with its own folder hierarchy, link-based sharing, and deleted-item recovery.. Cowork has deleted user files with no built-in recovery path, underscoring that this is task/file access rather than a managed storage product.
Native data tables
Sim
Yes: a native spreadsheet-like Tables feature (typed columns, not an external DB connector) with full keyboard support (arrow keys, Tab, copy-paste bulk load, Cmd/Ctrl+Z undo) and atomic per-row writes from multiple workflows at once. No public fixed row-limit figure is documented (guidance says paginate reads past ~100k rows); a workflow can also be wired to run per row via a "workflow column."
Claude Cowork
No: Claude Cowork has no native in-platform spreadsheet/data-table object. It manipulates rows, columns, and formulas inside external files (Excel .xlsx, Google Sheets via connector) on the user's local filesystem or a connected app, not a first-party database-like table stored in the Claude workspace itself.. Cowork is a desktop file/task agent, not a workflow platform with a persisted data-table primitive.
Rich-text document editor
Sim
Claude Cowork
No: Claude's document surface (Artifacts) is generated and edited by Claude itself. Artifacts remain view-only for the user (only Claude can edit the content), unlike a true inline WYSIWYG editor. Claude for Word is a separate Microsoft Word add-in, not an in-platform rich text editor for documents stored in Claude.. Anthropic shipped faster inline-edit updates to Artifacts in October 2025, but this is Claude regenerating content, not a user-drivable rich text editor.
Sub-workflows (composition)
Sim
Claude Cowork
No: Claude Cowork has no visual workflow builder and no feature to call one saved task as a reusable step inside another task. Anthropic's scheduled-tasks documentation describes each scheduled task as its own independent Cowork session, with no composition or nesting mechanism.. Cowork's closest analog is model-driven 'sub-agent coordination', where Claude itself decides to break a single task into parallel sub-agent workstreams at run time. That is not a user-authored, reusable sub-workflow the way a workflow platform lets you call a saved flow as a step with explicit parent-waits-for-child data passing.
Custom blocks (org-wide reuse)
Sim
Yes: a user with admin access on a workflow's workspace can publish its deployed version as a named, iconed custom block that appears in the block toolbar for the whole organization. Inputs are read live from the source workflow's Start block; the publisher picks which outputs to expose. The block always runs the source workflow's latest deployed version, and its internal steps and intermediate values are never exposed to consumers. Enterprise-gated on Sim Cloud; self-hosted deployments can opt in via a feature flag. Distinct from the Workflow (sub-workflow) block, which composes a workflow the same author controls, and from custom code/tool blocks, which run inline code rather than a full deployed workflow.
Claude Cowork
No: Claude Cowork has no visual workflow builder, so there is no completed workflow to publish as a reusable block. The closest adjacent capability is org-wide Skills sharing: a member enables 'Share with organization' on a Skill (a SKILL.md instruction file, optionally with reference docs/scripts), and it becomes available to everyone in Customize > Skills. Recipients can enable and use a shared Skill but cannot edit its contents.. This does not meet the bar of a published-workflow-as-block. A Skill is read-only prompt/instruction text Claude consults at runtime, not an encapsulated, deployed multi-step workflow with auto-derived inputs, hand-picked named outputs, and a hidden internal implementation that always tracks the source's latest version. Cowork Projects, the closest thing to a saved unit of work, explicitly do not support sharing for members of Team and Enterprise plans; separately, Anthropic notes projects are 'desktop-only and stored locally,' with no cloud sync.
Pricing
Pricing model
Sim
Credit-based billing, BYOK exempt from capsCredit-based usage billing (Stripe), with bring-your-own-key exemption from metered caps
Claude Cowork
Included in Claude subscription plansBundled into Claude subscription plans (no separate Cowork charge). Cowork is included at no additional charge on Pro, Max, Team, and Enterprise plans, subject to each plan's overall usage limits.
Entry paid plan
Sim
Pro plan at $25/user/monthPro: $25 per user/month
Claude Cowork
$17/mo annual ($20/mo monthly)Pro plan. $17/month billed annually ($20/month billed monthly). Pro is the lowest-priced individual plan whose feature list explicitly includes Claude Cowork.
Free tier
Sim
Claude Cowork
Free plan excludes CoworkFree plan exists but does not include Claude Cowork. The Free plan's feature list does not mention Cowork; Cowork requires a paid plan (Pro, Max, Team, or Enterprise).
Bring your own key
Sim
Claude Cowork
Not documentedNot documented / not applicable. There is no bring-your-own-API-key or bring-your-own-model option for Cowork. It runs exclusively on Claude models under the user's subscription.
Security & compliance
SOC 2
Data residency
Sim
Full control via self-hosting; Cloud region toggle is global, not per-customerFull data control via self-hosting (Docker/Kubernetes); data never leaves customer infrastructure when self-hosted. On Sim Cloud, async job execution has an internal US/EU region toggle, but it is deployment-wide, not a customer-selectable per-workspace residency option
Claude Cowork
No Cowork-specific residency controls; company-wide default is multi-region processing, US-based storage. Anthropic's general policy processes data in the US, Europe, Asia, and Australia by default, with data at rest stored in the US. Guaranteed regional inference is only available via AWS Bedrock, GCP Vertex AI, or Microsoft Foundry deployments of the Claude API. This is not a Cowork feature.
Role-based access control
Sim
Yes: admin/write/read workspace permissions, org-level admin/member roles, plus Enterprise-tier permission groups that allow/deny-list specific models, tools, and integrations per group on top of those base roles. See modelAndToolGovernance and credentialGovernance for the finer-grained permission-groups layer.
Audit logging
Sim
Claude Cowork
OTel only, not in Compliance APILimited: not in Compliance API/exports; OpenTelemetry is the primary visibility path. Cowork activity is not captured in the Compliance API. Team/Enterprise customers can stream tool/file/skill/approval events via OpenTelemetry to SIEM tools, with a shared user identifier allowing correlation with, but not replacing, Compliance API records.
Additional compliance
Sim
SOC2SOC2. Self-hosting is the primary lever Sim offers for data-residency-sensitive compliance needs beyond SOC2, rather than additional certifications.
Claude Cowork
ISO 27001, ISO 42001, HIPAA-readyISO 27001:2022, ISO/IEC 42001:2023, HIPAA-ready (BAA via sales-assisted Enterprise). Company-wide Anthropic certifications, not Cowork-scoped.
Model & tool governance
Sim
Yes: enterprise "permission groups" let an admin allow-list/deny-list specific LLM providers and models, and separately deny specific tools/integrations (or disable all MCP or custom tools) per group, layered on top of workspace admin/write/read roles. This does not control whether an LLM provider retains prompts. Sim offers no "zero data retention" mode or governed AI gateway. A separate, Enterprise-gated feature lets orgs set a log-retention window and redact PII, but that only controls how long Sim itself keeps execution logs.
Claude Cowork
Yes: Group Spend Limits and Per-Tool Connector Controls (GA, April 9, 2026). Group Spend Limits are per-team/per-group budgets set from the admin console (all paid plans), with the most-restrictive limit across a user's groups applying. Per-Tool Connector Controls let admins restrict specific actions within an MCP connector organization-wide (e.g. Gmail read-only, no send).
Credential governance
Sim
Yes: shared credentials (connected accounts, service accounts, workspace secrets) are their own nested permission level (Member/Admin) below organization and workspace roles, and enterprise permission groups can further allow-list specific integrations and restrict which file-share auth modes (public/password/email/SSO) a group may use. A user's personal environment variables/secrets are never shared or inherited by anyone, including org owners/admins.
Claude Cowork
Yes: On Enterprise plans, custom roles have a dedicated Connectors tab (separate from Capabilities/Permissions). Admins set access per connector, and per tool within a connector, as Always allow / Needs approval / Blocked, so a role can be limited to specific connected credentials rather than every organization connector.. Applies only to members on the 'Custom' role. User/Admin/Owner roles see every connector enabled org-wide.
Single sign-on (SSO)
Sim
Claude Cowork
Yes: Claude Enterprise supports SAML 2.0 single sign-on with identity providers like Okta, Entra ID, Google, OneLogin, JumpCloud, and Duo, plus domain capture (claims your email domain so all logins route through SSO) and automated JIT/SCIM user provisioning and de-provisioning tied to the IdP.. This is an Enterprise-plan feature covering claude.ai, Claude Desktop, and Cowork logins collectively, not configured separately for Cowork. Anthropic's SSO documentation describes SAML integrations specifically; it does not document OIDC support.
Vetted first-party integrations
Sim
Yes: every one of Sim's 266 blocks is first-party authored and code-reviewed through the standard pull-request process in the main Sim repository; there is no public marketplace where an arbitrary third party can publish and have other users install executable tool code without going through Sim's own review. Custom code steps run inside Sim's own isolated-vm sandbox rather than as an installable third-party skill package, so the supply-chain trust boundary is Sim's codebase review, not an open registry.
Claude Cowork
Partial: open plugin ecosystem with a documented malicious-skill incidentPartial: Anthropic maintains first-party catalogs (anthropics/skills, anthropics/knowledge-work-plugins, the 11 plugins bundled into Cowork), but the plugin/skill ecosystem is open by design. Any developer can host a plugin marketplace as a git repo, and users add it via `/plugin marketplace add`, with no Anthropic approval queue or review gate before installation. A third-party security audit has already found malicious entries in that broader ecosystem: Snyk's ToxicSkills research scanned ~3,984 skills on ClawHub and skills.sh (third-party marketplaces that also serve Claude Code users) and confirmed 76 malicious skills, with 1,467 flagged for security issues.. This incident sits in the broader Agent Skills ecosystem across third-party marketplaces, not Anthropic's own first-party catalog, but it shows real, sourced supply-chain risk adjacent to Cowork's installable-skill model. By contrast, every one of Sim's blocks is first-party authored and code-reviewed through the standard pull-request process in the main Sim repository; there is no public marketplace where an arbitrary third party can publish and have other users install executable block code without going through Sim's own review.
PII redaction
Sim
Claude Cowork
No/Unknown: Anthropic documentation does not describe a native, automatic PII detection/redaction feature applied to Cowork workflow content or retained logs. Third-party tools (gateway layers, Presidio-based scanners, the 'noirdoc' plugin) exist to add PII scrubbing around Claude, but this is not a built-in platform capability.
Custom data retention
Sim
Claude Cowork
Yes for org-wide Claude data, but this does not cover Cowork: Enterprise plan Owners/Primary Owners can set a custom data retention period (minimum 30 days) for conversation and project data in Organization settings > Data and Privacy, and data is kept indefinitely without customization. Cowork conversation history is stored locally on users' computers, is not subject to this standard retention policy, and cannot be centrally managed or exported by admins; Cowork activity is also not currently captured in the Compliance API.. This is an org-wide Claude Enterprise setting, not per-resource-type the way Sim's granular retention is, and it explicitly excludes Cowork. Cowork's local session history sits outside this policy entirely, stored only on-device. No Zero-Data-Retention addendum is described for conversation data.
White-labeling
Sim
Claude Cowork
No/Unknown: There is no evidence Anthropic lets an Enterprise customer replace Claude's own product branding (logo, product name, theme colors) inside the Claude Desktop, Cowork, or claude.ai interface itself. Claude Design (launched April 2026) lets Claude produce branded deliverables (documents, decks, landing pages) carrying the customer's brand, but that brands the output, not the vendor's own workspace UI.
AI capabilities
Multi-LLM support
Sim
21 providers plus dynamic-resolution aggregators (OpenRouter, LiteLLM, etc.)21 provider integrations (OpenAI, Anthropic, Google/Gemini, Azure OpenAI, Azure Anthropic, Groq, Cerebras, Mistral, xAI, Bedrock, Vertex, Ollama, OpenRouter, and more), with OpenRouter, LiteLLM, vLLM, and Ollama resolving models dynamically at runtime rather than from a fixed list, so effective model reach extends well beyond the 21 named providers. apps/sim/providers/models.ts defines 21 provider entries.
Agent reasoning blocks
Sim
Natural-language building
Knowledge base / RAG
Sim
Yes: hybrid vector (pgvector) plus full-text (tsvector) search knowledge base, 11 supported file formats (csv, doc, docx, html, json, md, pdf, pptx, txt, xlsx, yaml), configurable chunking, plus 51 connectors that continuously sync external sources (Google Drive, Confluence, Slack, Gmail, GitHub, HubSpot, Linear, Jira, and more) into the knowledge base rather than a one-shot upload
Claude Cowork
Project memory only, no RAGPartial: project-scoped memory/files, not a dedicated vector DB/RAG feature. Memory is supported within projects but is not retained across standalone Cowork sessions. There is no dedicated knowledge-base/embedding/RAG system comparable to Sim's Knowledge Base module.
MCP support
Sim
Evaluation & guardrails
Sim
LLM-judge Evaluator plus Guardrails validation blockEvaluator block (LLM-judge scoring against user-defined named metrics) and Guardrails block (JSON validity, regex, RAG/hallucination scoring, PII detection/masking). These are per-call scoring/validation primitives, not a batch golden-dataset eval-suite runner or A/B prompt-testing harness.
Claude Cowork
Safety guardrails, no eval frameworkSafety guardrails, not a formal eval/testing framework. Protections include RL training against malicious instructions, content classifiers scanning untrusted content for prompt injection, and per-application permission gates. There is no eval-suite/regression-testing feature for tasks.
Human-in-the-loop
Sim
Claude Cowork
Partial: deletion/app approval by default, plan review opt-inPartial: per-action approval for deletions/app access by default; full plan review is opt-in. Cowork's default mode is continuous execution without pausing. Explicit permission is still required before permanently deleting files and before accessing each application. Users can opt into 'Ask before acting' mode for a plan-review/step-by-step approval workflow on high-stakes tasks.
Generative media
Sim
Claude Cowork
Dynamic tool use
Sim
No: an Agent block calls tools the workflow author explicitly added to it at build time, rather than browsing and picking from a broader pool (e.g. an entire MCP server catalog) at inference time. Runtime MCP "discovery" exists to resolve/refresh the schema of an already-configured tool. The model does not browse or choose from the server's full tool list.
Claude Cowork
Yes: Claude selects tools/connectors dynamically at runtime. Claude picks the fastest path itself: a connector for Slack, Chrome for web research, or the screen to open apps when there's no direct integration. By comparison, Sim's workflow builder lets users configure which tool or connector an agent step uses at build time.
Automatic model fallback
Sim
No: a failed or rate-limited LLM call is retried using Sim's own hosted API keys for the same model, rather than automatically switching to a different model or provider. A "fallback" comment in the provider layer refers to rotating among Sim's own hosted API keys for the same model, not switching models.
Claude Cowork
Not documentedUnknown. No documentation describes automatic fallback between Claude models on error/overload for Cowork tasks.
Agent skills
Sim
Yes: named, reusable "Agent Skills" (built on the open Agent Skills / SKILL.md format) that agents load on demand via progressive disclosure, editable in-app or imported from a SKILL.md file or GitHub URL. Only the skill name and description sit in the agent's system prompt (~50-100 tokens each); the full instructions load into context only when the agent calls load_skill.
Claude Cowork
Yes: Claude Skills let a builder write a reusable instruction set once (a folder with a SKILL.md file plus optional reference docs, templates, and scripts). Claude automatically pulls in the right skill whenever the context matches, across Claude Code, Claude Desktop, Cowork, and claude.ai. Anthropic also ships a pre-installed 'Skill Creator' tool for building new skills.. Skills with executable code files (Python/bash) only run in Claude Code and Cowork, not in plain claude.ai chat.
Native chat deployment
Sim
Claude Cowork
No: Claude does not offer a native feature to deploy a configured agent as a standalone public-facing chat surface. Claude Projects can only be shared internally (org-wide 'Public' visibility inside the same organization, not the open internet), and Claude Artifacts can be published/embedded as static interactive content, but neither is a deployable conversational agent endpoint.. Third parties (e.g. Composio, Social Intents) offer unofficial embeddable widgets wrapping the Claude API, but that is not a native Anthropic feature.
Parallel execution
Sim
Yes: a native Parallel block fans a run out into concurrent branches (fixed count or one per list item) and joins their results back into the workflow automatically. Contained blocks run concurrently instead of sequentially, either a fixed number of times or once per item in a list/collection, and each branch's output aggregates for downstream blocks.
Claude Cowork
Yes: Anthropic's help documentation for Claude Cowork states that Claude 'breaks complex work into smaller tasks and coordinates parallel workstreams to complete them' and 'may coordinate multiple sub-agents working simultaneously' for complex tasks, with results synthesized back into one outcome.. This is model-driven sub-agent fan-out, not a user-authored 'parallel branches' node in a visual builder (Cowork has no visual workflow canvas). The underlying mechanism matches Claude Code's dynamic workflows, which fan work across concurrent subagents (up to 1,000 total, capped at 16 concurrent) and merge results, but Cowork's documentation describes this at a higher, less configurable level.
Agent2Agent (A2A) protocol
Sim
Claude Cowork
No: Anthropic documentation does not state that Claude Cowork (or Claude products generally) implements the Agent2Agent (A2A) protocol as an agent-to-agent peer standard.. Anthropic ran a joint webinar on deploying multi-agent systems using MCP and A2A together with Claude on Google Cloud Vertex AI, but that describes third-party orchestration infrastructure around Claude, not native A2A support built into Cowork or the Claude API. Anthropic's own multi-agent story is MCP for tool/data connections and Managed Agents/sub-agent coordination for delegation, not A2A.
Loop / iteration block
Sim
Claude Cowork
No: Claude Cowork has no visual builder and no dedicated for-each/while loop container that iterates a set of steps over a list or fixed count. Anthropic's documentation describes scheduled tasks re-running on a time cadence (hourly/daily/weekly), not a loop node iterating over items within a single run.. The closest mechanism is Claude's own model-driven 'parallel workstreams' for breaking one task into concurrent sub-agents, the opposite of sequential per-item iteration and not user-configurable as a loop primitive.
Integrations
Integrations
Sim
1,000+ integrations (266 blocks, ~3,900 tool actions)1,000+ integrations counting individual API actions, built from 266 first-party blocks and roughly 3,900 underlying tool actions. Sim's landing page cites the "1,000+ integrations" figure; the block/tool-action counts are the same integration surface measured at a different level of granularity.
Claude Cowork
200+ connectors (estimated)200+ connectors (estimated from Anthropic's own Connectors Directory; Anthropic does not publish an exact figure). Anthropic's Connectors Directory lists connectors like Linear, Slack, Google Drive, Google Workspace, and Microsoft 365, but no primary Anthropic page states a total count.
Trigger types
Sim
Webhook, cron, chat, REST API, 61 app triggers, plus a diff-aware Tables triggerWebhook, schedule/cron, chat, REST API, and event-based triggers for 61 apps (Slack, Gmail, GitHub, Stripe, etc.), plus a native row-level trigger on Sim Tables that fires on insert/update with an optional column watch-list and emits a before/after diff
Claude Cowork
Manual or scheduled only, no webhooksManual (on-demand) or schedule-based only. No external event/webhook triggers. Tasks start either by user prompt (desktop or mobile) or on a defined schedule (hourly/daily/weekly/weekdays); scheduled runs require the computer awake and desktop app open. There is no capability to trigger a task from an inbound webhook or other external event.
Custom code steps
Claude Cowork
No user-authorable code-step primitive; agent can execute code internally. Custom logic is added via plugins that bundle skills (instructions in SKILL.md files), connectors, and sub-agents — not a user-written code block inserted into a task. Shell commands and any code Cowork writes execute inside an isolated Linux VM as part of the agent loop, not as a user-authored step.
API publishing
Sim
Yes: a public REST API (mostly under /api/, with /api/v1 reserved for logs and audit-log endpoints) supporting API-triggered workflow execution and deployment rollback. The API reference does not document SSE streaming, a resumable event buffer, a dedicated API-trigger block, or a chat-deployment surface as part of the REST API itself.
SDKs & extensibility
Sim
Official Python and TypeScript SDKs, plus MCP, code block, and A2A protocolOfficial client SDKs exist for Python (simstudio-sdk, pip install simstudio-sdk) and TypeScript/JavaScript (simstudio-ts-sdk, npm install simstudio-ts-sdk), both wrapping the REST API (x-api-key header) with methods like execute_workflow / executeWorkflow, retry-with-backoff, and usage-limit lookups. Extensibility is further extended by MCP (client + server), a sandboxed code-execution block (JS/Python), custom tools, and an Agent-to-Agent (A2A) protocol block for external agent interop
Claude Cowork
Plugin/skill files, no dedicated SDKPartial: file-based plugin/skill authoring, not a dedicated public SDK. Skills are plain SKILL.md instruction files. Plugins bundle skills, connectors, slash commands, and sub-agents together, and a built-in Skill Creator tool generates skill files interactively. New connectors are built as standard MCP servers rather than through a Cowork-specific SDK.
Publish as MCP server
Sim
Claude Cowork
N/A: consumes MCP, no evidence of publishing as serverUnknown/Not applicable: Claude Cowork is an MCP client (it consumes remote and custom-connector MCP servers), but there is no evidence Cowork lets a user publish a Cowork session/task or a 'workflow' as a callable MCP server for external tools to consume.. Cowork is a desktop agent, not a workflow builder with deployable artifacts, so the reverse-direction 'publish as MCP server' concept doesn't map onto it the way it does for Sim.
Observability & durability
Tracing & observability
Sim
Yes: execution logs include a per-block/per-span trace view (duration, cost, token counts, and latency stats like TTFT/TPS) with expandable nested iteration groups, plus a "View Snapshot" frozen copy of the workflow structure and block states at run time for debugging. This trace view is built directly into Sim rather than a raw export browsable in an external tool like Jaeger, and does not expose aggregate latency-percentile charts (p50/p95/p99). The run snapshot serves as a log-detail/debugging artifact rather than a resumable mid-run checkpoint.
Claude Cowork
OTel events, not block-level tracingOpenTelemetry event stream (Team/Enterprise), not block-by-block execution tracing. Cowork emits OTel events for tool/connector calls, file reads/modifications, skills used, and whether each action was approved manually or automatically, compatible with Splunk/Cribl SIEM pipelines. An Analytics API adds per-user activity and skill/connector invocation counts plus DAU/WAU/MAU. This is coarser than a per-block execution trace like Sim's Logs module.
Durability & retries
Sim
Tool-call retries (up to 10x); single-attempt job orchestrationIndividual tool/API calls have configurable exponential-backoff retry (up to 10 attempts). The background job-orchestration layer itself retries only once by design. Durability instead comes from consecutive-failure tracking on schedules and the human-in-the-loop snapshot pause/resume mechanism. Sim does not offer guaranteed-once-only block execution, a failed-run holding queue for manual recovery, or a "replay a past execution with its original inputs" feature. The per-execution debugging snapshot serves as a log-detail artifact rather than a resumable mid-run checkpoint.
Claude Cowork
Server-durable: runs remotely regardless of device stateDurable server-side execution for scheduled tasks. Scheduled tasks in Claude Cowork now run remotely on Anthropic's infrastructure, independent of whether the user's computer is awake or the Desktop app is open — this is durable server-side execution, not client-dependent.
Failure alerting
Sim
Claude Cowork
Not documented; prior skipped-run notification premise is outdatedNot documented under the current remote-execution model. Earlier documentation described a notification only when a scheduled run was skipped due to sleep/closed app, but that premise no longer applies now that scheduled tasks run remotely regardless of device state. The current schedule-recurring-tasks article is silent on failure/retry alerting for task errors, so this behavior should be treated as unverified pending updated Anthropic documentation.
Data drains
Sim
Yes: Enterprise orgs can continuously export workflow logs, job logs, or audit logs on a schedule to a customer-owned S3 bucket, GCS bucket, Azure Blob container, BigQuery table, Snowflake table, Datadog logs intake, or an HTTPS webhook. Each drain exports exactly one data source; multiple drains are created to export multiple sources. Viewing drain config/run history is restricted to org owners/admins.
Claude Cowork
Yes: Claude Enterprise's Compliance API (GET /v1/compliance/activities) gives programmatic, ongoing access to the organization's activity feed and configuration state. Anthropic supports pull-based pipelines that continuously land this data in S3/Azure Blob and feed SIEM tools like Datadog Cloud SIEM. There is also a narrower manual CSV audit-log export in claude.ai org settings.. This is a general Claude Enterprise platform feature (Compliance API), not a Cowork-specific setting. Cowork's own local session history is not centrally exportable by admins.
Async execution
Sim
Yes: a workflow can be triggered in fire-and-forget async mode, returning HTTP 202 with a job ID immediately, then polled via a dedicated jobs endpoint through queued/processing/completed/failed states. Async jobs are tracked via polling the job endpoint rather than a completion webhook/callback option.
Claude Cowork
Yes: Claude Cowork now supports true server-side background execution: remote sessions and scheduled tasks continue running on Anthropic's infrastructure even when the Desktop app is closed or the computer is asleep, except for tasks that require local file or browser access, which still need the app open.. The phrase 'assign a task and step away' now more closely matches a real cloud job: remote sessions and scheduled/recurring tasks (set up via the /schedule skill) run on their cadence independent of device state. Tasks that need local file system or browser access are the exception and still require the desktop app open on an awake machine.
Execution limits
Sim
5-50 min sync timeout, 90 min async, 10-1,000 concurrentPlan-gated: synchronous API calls time out at 5 minutes on the free plan and 50 minutes on paid plans, async calls at 90 minutes on every plan, with 10 to 1,000 concurrent executions per billing account depending on plan. Concurrency limits are published in the platform cost docs, and Enterprise limits are customizable. Request bodies are separately capped at 10 MB.
Claude Cowork
10-min request timeout, rolling 5-hour windowAnthropic publishes only relative and structural limit information for Cowork/Claude Code, not fixed absolute numbers: usage is metered on a rolling 5-hour window, which varies by plan (Pro, Max, Team, Enterprise) and was doubled, with the peak-hours limit reduction removed, in Anthropic's May 2026 update. Per-request behavior is concrete: the default API request timeout is 10 minutes (600000ms, configurable via API_TIMEOUT_MS), and transient errors are auto-retried up to 10 times (capped at 15) with exponential backoff before surfacing a failure.. Anthropic does not publish an exact numeric ceiling for '5-hour window' usage (e.g. a fixed message or token count) or a concurrent-task limit for Cowork specifically, only that limits are plan-dependent and were doubled/loosened in May 2026. The 10-minute request timeout and retry counts come from Claude Code's official error reference, which states it applies across the CLI, Desktop app, and web.
Partial-failure handling
Sim
Claude Cowork
No: Cowork/Claude Code runs as a single sequential agentic conversation rather than a branching workflow. There is no mechanism to route a failed step to a separate error-handling path while the rest of the run continues independently. Anthropic's error reference describes only two outcomes for a failure: transient errors (server 5xx, overload, timeouts, dropped connections) are automatically retried up to 10 times with exponential backoff, and the run continues if a retry succeeds; once retries are exhausted, the error surfaces and the in-flight turn halts, requiring the user to retry the request or use /rewind to step back to an earlier checkpoint and resume manually.. This is a materially different model from a DAG-style workflow with per-branch try/catch: Cowork has no concept of parallel branches where one can fail into an error handler while sibling branches keep executing. GitHub issues on Cowork task failures corroborate that a hard failure stops the task rather than isolating it to one step.
Unattended execution
Sim
Yes: scheduled, webhook, and chat-triggered runs execute as background jobs on trigger.dev workers, entirely on Sim's servers. No client device needs to be open, awake, or connected for a run to fire or complete; closing the browser tab or shutting down a laptop has no effect on a scheduled or triggered workflow.
Claude Cowork
Yes: scheduled tasks execute server-side/remotely on Anthropic's infrastructure, independent of whether the Claude Desktop app is open or the device is awake, per Anthropic's current documentation. Scheduled/recurring tasks now run on their cadence on Anthropic's infrastructure regardless of client device state. Tasks that require local file or browser access remain the exception and still need the desktop app open and the machine awake.
Support
Support channels
Sim
Community support plus Enterprise 'Dedicated Support'Community (open source, GitHub) plus an unquantified "Dedicated Support" flag on the Enterprise plan. Enterprise and pricing pages do not include CSM, onboarding/enablement, or professional-services details beyond a plan-comparison-table "Dedicated Support" flag.
Claude Cowork
AI bot for all, human on paid plansAI support bot for all tiers; human support (in-app messenger + email escalation) for Pro/Max and Enterprise Owners; no phone or live chat. An AI bot is available to all users via the in-app support messenger. Pro/Max users and Enterprise Owners get full human Product Support access. Anthropic does not offer phone or live chat support.
SLA
Sim
Claude Cowork
Not publicly documentedNot publicly documented. No published SLA terms exist. Sales-assisted Enterprise plans offer dedicated customer success management but no stated uptime/response-time SLA.
Community
Sim
100,000+ buildersOver 100,000 builders use Sim
Claude Cowork
City meetups + open-source plugin repoCity-based community program + open-source plugin repo (no dedicated forum found). Anthropic runs a city-based 'Claude Community' program; an open-source knowledge-work-plugins repo exists for sharing Cowork/Claude Code plugins. There is no dedicated public discussion forum comparable to n8n's or Sim's community forum.
Academy / training
Sim
Claude Cowork
Yes: Anthropic Academy (anthropic.skilljar.com) offers a structured set of free, self-paced courses across three tracks (AI Fluency, Product Training, Developer Deep-Dives), each awarding a completion certificate, plus a paid proctored 'Claude Certified Architect' professional certification launched under the Claude Partner Network.. This is a general Claude/Anthropic learning resource, not Cowork-specific, but it covers Cowork usage (e.g. the 'Introduction to Claude Cowork' course).
Sim standout features
AI Copilot / Chat agent-building surface
Chat builds and manages work across the workspace; in-editor Copilot edits a single workflow.
A workspace-wide natural-language surface (Chat) that can build workflows, manage data, and take actions across integrations, plus an in-editor Copilot scoped to building and editing a single workflow directly.Hybrid semantic + keyword knowledge base
Combines vector and full-text search with configurable chunking across 11 file formats.
Built-in RAG with pgvector embeddings and a generated tsvector column for combined vector + full-text search, plus a token-based chunker with configurable chunk size/overlap and 11 supported file formats (csv, doc, docx, html, json, md, pdf, pptx, txt, xlsx, yaml).Native MCP client and server
Call external MCP servers as tools, or expose Sim workflows as an MCP server.
A dedicated MCP block lets any workflow call external MCP servers as a tool, and a serve/workflow-servers API surface lets Sim expose its own workflows as MCP servers.Fork a workspace into dev, qa, and prod environments
Fork, diff, and promote environments with mandatory credential remapping.
Fork a whole workspace into a dev/qa/prod-style child environment, preview a diff, and promote changes bidirectionally. Credential and env-var remapping is required on every promote, so secrets never cross environments silently.Human-in-the-loop approvals with durable resume
Pause a run for human approval and resume later via a durable snapshot link.
A dedicated block pauses a run and waits for a human-submitted approval form, backed by persisted execution snapshots so the run can resume later via a link, even after a server restart.Self-hostable under Apache 2.0
Fully open source with Docker Compose and Helm deployment options.
Fully open source (Apache 2.0), with Docker Compose files and a Helm chart for Kubernetes deployment, alongside a managed cloud-hosted option.Live multiplayer canvas editing
Real-time cursors, selections, and synced edits on the same canvas.
Real-time cursors, selection broadcasting, and synced concurrent edits over a dedicated realtime backend, so a team can build the same workflow together at the same time.Documented Claude Cowork limitations
No webhook/external-event-triggered automation
Tasks run manually or on a schedule (now remote); no external event/webhook trigger.
Task initiation is manual (prompt via desktop or mobile) or on a user-defined schedule (hourly/daily/weekly/weekdays). Scheduled tasks now run remotely in the cloud on their set cadence, independent of whether the user's computer is awake or the Claude Desktop app is open. There is still no external event/webhook trigger capability — only time-based scheduling.No API publishing / callable endpoint deployment
Tasks cannot be published as callable API endpoints for external systems.
Cowork has no mechanism to publish or deploy a task as an API endpoint that external systems can call. Unlike a Sim workflow, it is strictly a session inside the Claude apps (web, desktop, and mobile), run manually or on a schedule.Cowork activity is not captured in audit logs / Compliance API
Cowork actions are absent from the Compliance API and standard data exports.
Cowork activity does not appear in the Compliance API or standard data exports. OpenTelemetry (Team/Enterprise only) is the only visibility mechanism documented for streaming Cowork events to SIEM/observability tools; Anthropic does not document a way to reconcile it with Compliance API records, so it is not a full audit trail on its own.Computer-use has no sandboxing between Claude and the screen
Screen/computer-use actions run unsandboxed, carrying prompt-injection risk.
Unlike file operations or code execution, which run in an isolated VM, direct computer-use/screen interaction is not sandboxed. Anthropic documents prompt-injection risk and recommends active supervision, avoiding sensitive data, and caution with the 'Act Without Asking' mode.Bottom line
Choose Sim if you want an open-source, self-hostable AI workspace that treats AI agents as first-class citizens: native multi-LLM support, real-time multiplayer editing, environment promotion (dev/qa/prod), human-in-the-loop approvals, and enterprise governance (SSO, credential-level permissions, audit logs) built in rather than bolted on.
Choose Claude Cowork if you specifically need dynamic, runtime tool selection (no pre-wiring): Claude decides itself at execution time how to reach a given goal: "Tell Claude what you need, not how" — it opens a browser for web tasks and takes over the screen directly only when it has to, rather than a builder where a user pre-wires which tool a step uses.
Frequently asked questions
Sim is an open-source AI workspace where teams build, deploy, and manage AI agents visually, conversationally, or with code. Claude Cowork is Anthropic's autonomous desktop agent, built into the Claude Desktop app. Give it a goal in plain language and it works across your local files, folders, and apps (via connectors, a browser, and direct screen control) to finish a multi-step task end-to-end. It is not a visual workflow builder or automation/integration platform like Sim, n8n, or Zapier. It's a session-based agent that only runs while the desktop app is open and the computer is awake. Teams considering a switch typically weigh licensing (Sim is Apache 2.0 and self-hostable), pricing model, and how AI-native the platform's agent-building experience is.