Composio

Composio is an AI tool-calling and integration platform from Sampark Inc, a Y Combinator W24 company, that connects AI agents to over 1,000 external tools and services through its MCP Gateway and function-calling infrastructure. It solves the authentication, rate-limiting, and execution-reliability problems agents hit when taking actions in systems like GitHub, Salesforce, Slack, Gmail, Linear, and Notion. Instead of building and maintaining individual integrations, developers get managed, production-grade connections that handle OAuth flows, credential refresh, and error handling automatically. The MCP Gateway gives agents a single standardized endpoint for all tool calls, compatible with Claude, Cursor, Codex, Hermes, and other frameworks. Its GitHub repository has passed 29,000 stars, reflecting strong developer adoption. Integration coverage spans 1,000-plus tools across CRM (Salesforce, HubSpot), project management (Linear, Jira, Asana, Notion), communication (Slack, Gmail, Microsoft Teams), code platforms (GitHub, GitLab), storage (Google Drive, Dropbox), and scheduling (Google Calendar, Outlook). Composio maintains each integration, including OAuth token refresh, rate-limit handling, and schema versioning, so developers do not maintain their own integration layer. Composio is developer-facing and requires SDK, CLI, or MCP integration; there is no no-code interface for non-technical users, and it handles API actions rather than browser automation, with Browser Use as the complement for web interfaces that lack APIs. Pricing is in USD and usage-based across four tiers. Totally Free is $0 per month with 20,000 tool calls per month and community support. Ridiculously Cheap is $29 per month with 200,000 tool calls per month, email support, and $0.299 per 1,000 additional calls. Serious Business is $229 per month with 2,000,000 tool calls per month, Slack support for teams over 1,000 calls per month, and $0.249 per 1,000 additional calls. Enterprise is custom-quoted with a dedicated SLA, custom volume, and VPC or on-premises deployment. Composio has announced that this pricing will change in August 2026, so current rates and quotas should be re-checked. Composio is not the right fit for non-technical teams: it requires SDK, CLI, or MCP integration and has no visual interface for business users. No-code platforms like Zapier or Make are a better fit for connecting the same SaaS tools without code. Startups building browser-based automation rather than API tool-calling should evaluate Browser Use alongside Composio, since the two are complementary: Composio handles API actions while Browser Use drives web interfaces that lack APIs. Teams that only need a handful of simple integrations without agentic tool-calling may find a general automation tool sufficient. Current state Q3 2026: Composio has passed 29,000 GitHub stars and expanded from about 250 integrations to over 1,000 toolkits, with the MCP Gateway now adding tool search and context management alongside authentication and a sandboxed workbench. It serves agent frameworks including Claude, Codex, Cursor, and Hermes. Its trust center at trust.composio.dev now publishes SOC 2 Type II and ISO 27001, an upgrade from the earlier state where no public trust page existed. G2 presence is early at 7 reviews at 4.9 stars, so the primary evidence signal remains GitHub adoption. Not affiliated.