iPaaS & API Integration Software & Alternatives

Composio

Integration platform for AI agents & LLMs with support for 250+ apps and custom tools.

28.7K stars open source

AI Agents iPaaS & API Integration

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Airbyte

Open-source data movement for ELT pipelines and AI agents — from APIs, databases & files to warehouses, lakes, and AI applications. Both self-hosted and Cloud.

21.4K stars open source

Data Pipelines & ETL iPaaS & API Integration

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9router

Unlimited FREE AI coding. Connect Claude Code, Codex, Cursor, Cline, Copilot, Antigravity to FREE Claude/GPT/Gemini via 40+ providers. Auto-fallback, RTK -40% tokens, never hit lim... Read More

17K stars open source

LLM Tools & Chat UIs iPaaS & API Integration

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Rabbitmq Server

Open source RabbitMQ: core server and tier 1 (built-in) plugins

13.7K stars open source

IoT Platforms iPaaS & API Integration

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Pipedream

Connect APIs, remarkably fast. Free for developers.

11.4K stars open source

Automation iPaaS & API Integration Low-Code & No-Code Dev

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Mosquitto

Eclipse Mosquitto - An open source MQTT broker

11K stars open source

IoT Platforms iPaaS & API Integration

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Nango

Build product integrations with AI.

10.3K stars open source

API Tools iPaaS & API Integration

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Evolution Api

Evolution API is an open-source WhatsApp integration API

8.6K stars open source

iPaaS & API Integration Live Chat & Chatbots

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Klavis

Klavis AI: MCP integration platforms that let AI agents use tools reliably at any scale

5.7K stars open source

AI Agents iPaaS & API Integration

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Aci

ACI.dev is the open source tool-calling platform that hooks up 600+ tools into any agentic IDE or custom AI agent through direct function calling or a unified MCP server. The birth... Read More

4.8K stars open source

AI Agents API Tools iPaaS & API Integration

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Integuru

The first AI agent that builds permissionless integrations through reverse engineering platforms' internal APIs.

4.6K stars open source

AI Agents RPA iPaaS & API Integration

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Emitter

High performance, distributed and low latency publish-subscribe platform.

4K stars open source

IoT Platforms iPaaS & API Integration

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Graphql Mesh

🕸️ GraphQL Federation Framework for any API services such as REST, OpenAPI, Swagger, SOAP, gRPC and more...

3.5K stars open source

API Tools iPaaS & API Integration

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Metorial

Connect any AI model to 1200+ integrations (MCP, CLI, API)

3.3K stars open source

AI Agents iPaaS & API Integration

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Svix

Open-source webhooks as a service that makes it super easy for API providers to send webhooks.

3.2K stars open source

API Tools iPaaS & API Integration

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Activemq

Apache ActiveMQ

2.4K stars open source

iPaaS & API Integration Communication

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Crossbar

Crossbar.io - WAMP application router

2.1K stars open source

iPaaS & API Integration Communication

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Aedes

Barebone MQTT broker that can run on any stream server, the node way

2K stars open source

IoT Platforms iPaaS & API Integration

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Messaging Apis

Messaging APIs for multi-platform

1.9K stars open source

API Tools iPaaS & API Integration

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Eventmesh

EventMesh is a new generation serverless event middleware for building distributed event-driven applications.

1.7K stars open source

iPaaS & API Integration FaaS & Serverless

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Hmq

High performance mqtt broker

1.4K stars open source

IoT Platforms iPaaS & API Integration

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N2o

⭕ N2O: Distributed WebSocket Application Server ISO 20922

1.3K stars open source

IoT Platforms iPaaS & API Integration Web Servers

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Hook.io

Open-Source Microservice Hosting Platform

1.3K stars open source

iPaaS & API Integration FaaS & Serverless

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Dbos Transact Ts

Database-Backed Durable TypeScript Workflows

1.2K stars open source

Workflow Automation iPaaS & API Integration

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