Composio

✓ Editorially verified

Auth, tools, and sandboxed execution for AI agents across 1,000+ apps

Freemium· Free (20K tool calls/mo) / Ridiculously Cheap $29/mo (200K calls, $0.299 per 1K overage) / Serious Business $229/mo (2M calls, $0.249 per 1K overage) / Enterprise custom (SOC-2, VPC/on-prem, dedicated SLA)AgentsModel-agnostic (works with Claude, GPT-4o, Gemini, Llama, and other frontier and open-weights models via SDK integrations)

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Best for

Engineering teams shipping multi-tool AI agents in production who want managed auth, a broad integration catalogue, and sandboxed execution without building the plumbing themselves.

Skip if

Solo hackers whose agent only needs one or two APIs, or teams with strict data-residency rules that forbid delegating OAuth tokens to a third-party managed platform.

Composio is a tool-calling and integration layer for AI agents that solves the plumbing problem most builders hit the moment their agent needs to actually do something in the real world. Instead of hand-rolling OAuth flows, API clients, retry logic, and sandboxed execution for every SaaS your agent touches, Composio ships a managed catalogue of 1,000+ pre-built integrations — Gmail, Slack, GitHub, Linear, Notion, Sentry, Stripe, Vercel, Supabase, Google Docs, Google Calendar and the long tail — each exposed as a callable tool with delegated auth, token refresh, and structured schemas already handled. It is framework- and model-agnostic: you wire it into LangChain, LlamaIndex, CrewAI, OpenAI's SDK, Anthropic's SDK, Vercel AI SDK, or an MCP client, and the same tool definitions work across Claude, GPT, Gemini, and open-weights models. Beyond the integration catalogue, Composio adds intent-based tool discovery (the agent asks 'send an email' and the right tool surfaces rather than shoving 1,000 schemas into context), sandboxed remote execution environments with navigable filesystems for code-writing agents, bidirectional triggers so external app events wake your agent up, and per-end-user auth state so a multi-tenant agent can act on behalf of each of its users without leaking credentials. Common workflows include building customer-support agents that read Gmail and file Linear tickets, sales agents that update CRMs and post to Slack, coding agents that open GitHub PRs and read Sentry issues, and internal ops bots that automate Notion, Docs, and Calendar. It is aimed squarely at engineering teams shipping production agents who would rather buy the auth-and-integration substrate than build it.

Editor's take

Composio is the most credible attempt yet to be the Twilio of agent tool-calling — auth, integrations, and sandboxes as a service so you can spend time on the agent, not the plumbing. The pricing scales with tool calls, which is honest but bites at volume, and delegating OAuth to any third party is a real trust decision. For teams past the demo stage building agents that actually touch SaaS, it earns its keep.

— The AI Tool Bible editorial team

Pros

✅ 1,000+ pre-built app integrations with managed OAuth, token refresh, and per-end-user auth state out of the box
✅ Framework- and model-agnostic — works with LangChain, LlamaIndex, CrewAI, OpenAI, Anthropic, Vercel AI SDK, and MCP clients
✅ Intent-based tool discovery avoids blowing up context windows with hundreds of tool schemas
✅ Sandboxed remote execution environments for code-running agents, with filesystem access
✅ Bidirectional triggers let agents react to external app events, not just poll
✅ Generous free tier (20K tool calls/mo) makes it cheap to prototype
✅ Enterprise path with SOC-2, VPC, and on-prem deployment for regulated buyers

Cons

⚠️ Usage-based pricing on tool calls can escalate fast for chatty agents at scale
⚠️ You are trusting a third party with delegated OAuth tokens for sensitive apps — a supply-chain and blast-radius concern
⚠️ Managed catalogue means you inherit whatever quirks and rate-limit handling Composio ships per integration
⚠️ Abstraction can leak when you need low-level control over a specific API's edge cases
⚠️ Newer platform — docs, SDK stability, and community depth still trail LangChain-era tooling
⚠️ Overkill if your agent only needs one or two integrations you already have SDKs for

Use cases

Customer support agent triaging Gmail and filing Linear ticketsSales agent updating HubSpot and posting to SlackCoding agent opening GitHub PRs and reading Sentry issuesInternal ops bot automating Notion, Google Docs, and CalendarMulti-tenant SaaS agent acting on behalf of each end userMCP server backend for Claude Code and Cursor workflowsEvent-driven agent triggered by Stripe or Vercel webhooksCode-execution agent using sandboxed remote filesystems