Open source gateway projects
Every project in the registry tagged gateway, ranked by real GitHub adoption.
LLM gateway for auth, load balancing, and spend tracking
Zero trust network access that's better than VPN
Complete production stack for AI teams
.NET API Gateway
Ultra-fast AI gateway with enterprise-grade reliability
A Cloud Native traffic orchestration system. (CNCF Project)
Secure, scalable API key management for developers
An AI Gateway, registry, and proxy that sits in front of any MCP, A2A, or REST/gRPC APIs, exposing a unified endpoint with centralized discovery, guardrails and
MQTT gateway for ESP8266 or ESP32 with bidirectional 433mhz/315mhz/868mhz, Infrared communications, BLE, Bluetooth, beacons detection, mi flora, mi jia, LYWSD02
Unify APIs, databases, and services effortlessly
DavMail POP/IMAP/SMTP/CalDAV/CardDAV/LDAP Exchange and Office 365 Gateway - Synced with main subversion repository at
Unified API, event, and AI agent management platform
Related tags
Frequently asked questions
How many open source gateway projects are there?
This registry tracks 12 projects tagged gateway, with 134,041 GitHub stars between them. The most-adopted is LiteLLM at 59,003 stars.
Are these gateway projects free to use?
Yes — 9 of the 12 carry an explicit open-source licence across 4 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which gateway project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these gateway projects still maintained?
11 of the 12 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.