What is composio built with?

Q: Which repos have a stack like composio's?

The ones that share most of its stack: CopilotKit/CopilotKit, vectorize-io/hindsight, and firecrawl/firecrawl.

composio is a TypeScript repo built with Hono. It uses AI through ag2, openai-agents, composio, CrewAI, google-adk, and 14 more, validates its data with Zod, Pydantic, jsonschema, Ajv, zod-to-json-schema, and 2 more, is tested with Vitest, @effect/vitest, and fast-check, deploys with @hono/node-server, and uses Pusher. It has 384,701 written lines, with 669 test files.

Read on November 7, 2026, at commit e970677. Read it as markdown

The card says what it's built with. Its whole map opens it up: every part of the code and how it connects to the rest.

Frontend

Interface 1

clack3 files

Backend

AI 18

composio72 files
@earendil-works/pi-coding-agent4 files
eve4 files
LangChain4 files
CrewAI2 files
google-adk2 files
LangGraph2 files
llama-index2 files
@ai-sdk/provider-utils1 file
@mastra/core1 file
@openai/agents1 file
@typesafe-ai/sdk1 file

6 more

ai1 file
llamaindex1 file
typesafe-sdk1 file
ag2
openai-agents
autogen-core1 file

Services 2

OpenAI4 files · ts/packages/core/src/provider/OpenAIProvider.ts, line 10
Pusher3 files · ts/packages/cli/src/services/triggers-realtime.ts, line 53

Support

Validation 7

Zod48 files
Pydantic22 files
Ajv5 files
typebox3 files
@cfworker/json-schema2 files
zod-to-json-schema3 files
jsonschema1 file

Tools 12

TypeScript4 files
@changesets/read1 file
Cloudflare1 file
openapi-typescript1 file
Prettier1 file
tsdown1 file
build
Setuptools
tempy29 files
typing-extensions27 files
@manypkg/get-packages1 file
source-map-js1 file

Testing 3

Vitest253 files
@effect/vitest189 files
fast-check5 files

The base 1

Hono1 file

Deploy 1

@hono/node-server1 file

Other 18

Effect320 files
@composio/client93 files
SemVer8 files
json51 file
re2js1 file
undici1 file
urllib31 file
certifi
picocolors5 files
requests4 files
open3 files
mime2 files

6 more

dequal1 file
extract-zip1 file
fast-string-width1 file
safe-stable-stringify1 file
s
websocket-client

Other repos with a similar stack

Ordered by how much of its stack they share with composio, then by stars.

CopilotKitCopilotKit
38.5k
The Frontend Stack for Agents & Generative UI. React, Angular, Mobile, Slack, and more. Makers of the AG-UI Protocol
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firecrawlfirecrawl
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Frequently asked questions

What language is composio written in?

composio is written in TypeScript, with 384,701 written lines.

What framework does composio use?

composio is built with Hono.

Does composio use AI?

Yes. composio uses AI through ag2, openai-agents, composio, CrewAI, google-adk, LangGraph, llama-index, autogen-core, LangChain, typesafe-sdk, OpenAI, @earendil-works/pi-coding-agent, eve, @ai-sdk/provider-utils, llamaindex, @mastra/core, @openai/agents, @typesafe-ai/sdk, and ai.

What services does composio use?

composio uses Pusher.

The proof: ts/packages/cli/src/services/triggers-realtime.ts, line 53

Does composio have tests?

Yes. composio has 669 test files and is tested with Vitest, @effect/vitest, and fast-check.

Which repos have a stack like composio's?

The ones that share most of its stack:CopilotKit/CopilotKit vectorize-io/hindsight firecrawl/firecrawl