Open Source API Infrastructure Tools
A curated collection of the best open source infrastructure and tools for managing and securing APIs.
High-performance API gateway with built-in LLM support
Stars
17,097Last commit
1 day agoLicense
Apache-2.0
Apache APISIX is an open-source API gateway built on NGINX and etcd, offering dynamic routing, 100+ plugins, load balancing, authentication, and traffic management for APIs and LLM workloads.
Open Source Alternative to:
Universal API management for REST, GraphQL, gRPC & async
Stars
10,819Last commit
15 hours agoLicense
Unknown
Fast, scalable API management platform with open source gateway, analytics, dev portal and dashboard. Deploy anywhere with AI-ready governance and security.
Open Source Alternative to:
Effortless API mocking for seamless development
Stars
8,392Last commit
13 hours agoLicense
MIT
Create, run, and share mock REST APIs without coding. Boost productivity with an intuitive interface and powerful features.
Open Source Alternative to:
Secure, scalable API key management for developers
Stars
5,434Last commit
11 hours agoLicense
AGPL-3.0
Streamline API authentication with UnKey's powerful, developer-friendly platform for creating, revoking, and monitoring API keys.
Open Source Alternative to:
Blazing-fast API gateway with linear scalability
Stars
2,676Last commit
18 hours agoLicense
Apache-2.0
High-performance, stateless API gateway built for microservices. Handle 80K+ requests/second with transparent pricing and enterprise-grade reliability.
Open Source Alternative to:
The modern GraphQL runtime
Stars
1,443Last commit
13 days agoLicense
Apache-2.0
Swiftly design and ship best-practice GraphQL backends atop existing data sources and APIs.
Open Source Alternative to:
Unify APIs, databases, and services effortlessly
Stars
1,263Last commit
12 hours agoLicense
Apache-2.0
A powerful backend framework that simplifies API integration, enhances security, and boosts developer productivity for modern web applications.
Open Source Alternative to:
Open-source GraphQL federation platform
Stars
484Last commit
13 hours agoLicense
MIT
A fully open-source schema registry, analytics, and gateway for GraphQL federation and APIs
Open Source Alternative to:
Unified API, event, and AI agent management platform
Stars
449Last commit
11 hours agoLicense
Apache-2.0
Full-lifecycle API management platform that unifies synchronous and asynchronous ecosystems. Manage APIs, event streams, and AI agents with enterprise security and 4x faster gateway performance.
Open Source Alternative to:
Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Sent