ComposioDeveloper platform connecting AI agents to 140+ SaaS apps and APIs

4.6 (5)

Reviewed by Daniel Nikulshyn·Updated May 2026

Developer Tools AI Agents Integrations SDK API Authentication SaaS

Overview

Composio is a developer-focused platform that helps engineers build AI agents capable of taking real actions across external software. It provides a unified layer of pre-built integrations spanning popular SaaS tools, APIs, and developer services, so agents can read data, trigger workflows, and operate accounts without custom glue code for each provider. The platform handles authentication, tool definitions, and execution details, exposing them through SDKs that plug into common agent frameworks. Developers can equip their agents with curated tool sets, manage user-level credentials, and extend coverage with custom actions when a built-in integration isn't available. Composio targets teams shipping production agents that need reliable, secure access to services like CRMs, project trackers, email, code hosts, and data tools, reducing the engineering overhead of maintaining many separate API integrations.

Key features

140+ prebuilt app and API integrations
Managed authentication and OAuth flows
SDKs for Python and JavaScript
Compatibility with popular agent frameworks
Per-user credential and connection management
Custom action and tool support

Pricing

Model: Freemium
Category: Task automation
Rating: 4.6 / 5 (5)

Use cases

Build Multi-App AI Assistants

Developers can equip AI agents with prebuilt integrations to read data and trigger workflows across 140+ SaaS tools without writing custom API connectors for each provider.

Automate SaaS Workflows via Agents

Use agents to perform actions across CRM, productivity, and developer tools—like updating records or sending messages—through a unified tool layer with managed OAuth.

Multi-User Agent Applications

Manage per-user credentials and connections so production agent apps can securely operate on behalf of individual end users across their own SaaS accounts.

Extend Agents with Custom Tools

When a built-in integration is missing, developers can define custom actions alongside Composio's catalog using Python or JavaScript SDKs in their preferred agent framework.

Pros & Cons

Pros

Large catalog of prebuilt SaaS integrations
Handles OAuth and credential management
Works with major agent frameworks and LLMs
Reduces custom integration code
Supports custom tools and actions

Cons

Requires developer skills to implement
Reliability depends on third-party APIs
Pricing may scale with usage and users
Less useful for non-agent workflows

Reviews

4.6

Average from 5 ratings.

Sofia Lindqvist

May 19, 2026

Years in this space

I've evaluated a lot of these over the years. What stands out here is per-user credential and connection management — handled better than most — and works with major agent frameworks and LLMs. Reliability depends on third-party APIs is my one real gripe. Worth the time if this is your use case.

Robert Ainsworth

Oct 14, 2025

Skeptical, then convinced

I went in skeptical — most tools in this space overpromise. It actually delivers on per-user credential and connection management, and large catalog of prebuilt SaaS integrations caught me off guard. still, I'd recommend giving it a real trial.

Joanna Kowalski

Sep 20, 2025

Skeptical, then convinced

I went in skeptical — most tools in this space overpromise. It actually delivers on managed authentication and OAuth flows, and handles OAuth and credential management caught me off guard. still, I'd recommend giving it a real trial.

Leila Hassan

Sep 3, 2025

Years in this space

I've evaluated a lot of these over the years. What stands out here is custom action and tool support — handled better than most — and works with major agent frameworks and LLMs. Worth the time if this is your use case.

Jamal Carter

Jul 23, 2025

Skeptical, then convinced

I went in skeptical — most tools in this space overpromise. It actually delivers on managed authentication and OAuth flows, and reduces custom integration code caught me off guard. Reliability depends on third-party APIs is why this isn't a perfect score, still, I'd recommend giving it a real trial.

Q&A

Which agent frameworks and languages does Composio support?

Composio offers SDKs for Python and JavaScript and is compatible with popular agent frameworks and major LLMs, letting developers plug its 140+ integrations directly into existing agent stacks.

What if an integration I need isn't in the 140+ prebuilt catalog?

You can extend Composio with custom actions and tools, defining your own integrations alongside the prebuilt ones. This lets agents cover services beyond the built-in catalog while still using Composio's execution and auth layer.

How does Composio handle authentication and per-user credentials?

Composio provides managed authentication, including OAuth flows, and supports per-user credential and connection management, so agents can securely act on behalf of individual end users without custom auth code.