Composio

What is Composio?

Composio is an integration platform that gives AI agents authenticated, tool-calling access to external apps. Instead of hand-building OAuth flows and API wrappers for every service, you connect an app once and your agent gets ready-to-call tools for Gmail, Slack, GitHub, Notion, Linear, Stripe, and 1,000+ others. It ships MIT-licensed Python and TypeScript SDKs plus adapters for the popular agent frameworks.

What is Composio best for?

Composio is best for developers building AI agents that need to do things — send email, open pull requests, update CRM records — not just generate text. Its catalog listed 1,089 toolkits and over 20,000 individual tools in August 2026, so it fits teams whose use cases live inside that catalog and who want managed per-user authentication rather than maintaining integration code themselves.

What can Composio do?

• Connect 1,000+ apps as pre-built toolkits (20,000+ individual actions and triggers).
• Manage OAuth end-to-end — delegated, per-user auth so each of your users connects their own accounts securely.
• Expose tools to any framework via adapters for OpenAI, Anthropic, the Claude Agent SDK, LangChain, LangGraph, LlamaIndex, CrewAI, the Vercel AI SDK, and Google GenAI.
• Serve tools over MCP through its MCP Gateway, so MCP-aware clients can discover and call them.
• Search tools by intent so the agent surfaces the right action instead of you wiring each one by hand.
• Run actions in sandboxed environments with per-session context for safer, isolated multi-step execution.
• Fire triggers on external events (50k trigger events/month on the free tier) to start agent workflows.

Where does Composio fall short?

• The open source part is the SDKs, not the platform. The Python/TypeScript SDKs and CLI are MIT-licensed, but the backend that stores credentials and executes tool calls is closed source and runs on Composio’s cloud. If you need the whole stack to be open and auditable, this is not a fully open source tool.
• Self-hosting is enterprise-only. There is no free self-host path — “bring your own cloud” is reserved for enterprise contracts, so on the free and Pro plans your auth tokens and tool traffic pass through Composio’s hosted infrastructure.
• Pre-built tools are a black box. You generally can’t inspect or modify the code behind a toolkit, and independent reviews describe its observability as surface-level, which can matter for production agents that need full request/response visibility.

Is Composio free?

Partly. The SDKs are free and MIT-licensed, and the hosted platform has a genuinely usable free tier: 100k tool calls/month (hard-capped, no credit card), 50k trigger events, unlimited connected accounts, 3 team members, and 1M LLM tokens. Beyond that, Pro is $29/month (includes $29 of usage credit, then ~$0.0003 per tool call), and Enterprise is custom-priced with SSO/SCIM and self-hosting.

What does Composio replace?

For teams wiring agents into apps, Composio replaces the work of building and maintaining OAuth and API integrations yourself. It also competes with the AI/MCP tool-calling features of hosted automation platforms — it’s a developer-first, agent-native alternative to Zapier, Make, and the enterprise iPaaS Workato, aimed at code-driven agents rather than no-code workflow builders. If you’d rather own the whole stack, self-hostable automation tools like n8n and Activepieces cover overlapping ground with a visual, fully open source approach.

FAQ

Is Composio open source? The SDKs and CLI are open source under the MIT license, and you can read and extend them. The hosted backend that stores credentials and executes tools is proprietary, so Composio is open source at the SDK layer but a managed cloud platform overall.

Can I self-host Composio for free? No. There is no free self-host option; running Composio’s platform on your own infrastructure (“bring your own cloud”) is an enterprise-only arrangement. On the free and Pro tiers you use Composio’s managed cloud.

Is Composio a good Zapier alternative? For developers building AI agents, yes — it targets authenticated tool calling from code with framework adapters and MCP support, rather than Zapier’s no-code editor. If you want a point-and-click builder for non-developers, a traditional automation tool fits better.

What do I need to run Composio? Just the SDK for your language (Python or TypeScript), a Composio API key, and an LLM/agent framework. The heavy lifting — auth storage and sandboxed execution — happens in Composio’s cloud, so you don’t run your own servers on the free or Pro plans.