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Gives AI agents authenticated, rate-limited access to over 1,000 external tools and apps through one API.
Composio is developer infrastructure that lets AI agents call real external tools and apps — Gmail, GitHub, Slack, and over a thousand others — without each project having to build its own auth and API wrappers. It handles delegated authentication, executes tool calls in sandboxed environments, supports parallel execution, and plugs into MCP clients like Claude Code and Cursor as well as direct SDK use. The free tier includes 100,000 tool calls and unlimited connections a month; the Pro plan is $29 a month with pay-as-you-go overage after that, priced per tool call. The company is based in San Francisco, was founded in 2023, and has raised a Series A led by Lightspeed Venture Partners.
Free tier includes 100,000 tool calls and unlimited connections a month; Pro is $29/month plus pay-as-you-go overage at $0.0003 per additional tool call; Enterprise is custom-quoted.
Use tool ↗Composio solves a specific, real developer problem — letting an AI agent actually call Gmail, GitHub, Slack, and a thousand-plus other tools with proper auth handling — rather than building that plumbing per project. It's usage-priced per tool call past the free tier, and it's a funded, San Francisco-based company (Series A led by Lightspeed) rather than a thin indie site.
Watch out: Some premium integrations are priced well above the standard $0.0003-per-call rate — check per-tool pricing before assuming the whole platform costs the base rate.
Side-by-side fact sheets against the competitors our research names — pricing, platforms, API and both verdicts on one page.
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