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Top Open Source AI Gateways Tools in 2026

A curated collection of the 7 best free and open-source AI Gateways tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.

  • LiteLLM

    Acts as a unified proxy across 100+ LLMs, normalizing them to the OpenAI format while handling virtual keys, budgets, rate limits, fallbacks, and cost tracking.

    Stars
    57,381
    Last commit
    10d ago
    License
    Open Source

  • Gravitee

    AI Agent Management platform for enterprise scale

    Stars
    445
    Last commit
    10d ago
    License
    Apache-2.0

  • Bifrost

    Enterprise-grade AI gateway for LLM routing & governance

    Stars
    7,598
    Last commit
    10d ago
    License
    Apache-2.0

  • Portkey AI Gateway

    Unified AI gateway for 1,600+ LLMs and observability

    Stars
    12,839
    Last commit
    3mo ago
    License
    MIT

  • LLM Gateway

    Unified API for 40+ LLM providers

    Stars
    1,577
    Last commit
    11d ago
    License
    Open Source

  • Envoy AI Gateway

    Open source AI gateway for GenAI traffic management

    Stars
    1,965
    Last commit
    11d ago
    License
    Apache-2.0

  • Kong AI Gateway

    Secure AI gateway for LLM and MCP connectivity

    Stars
    —
    Last commit
    Recently
    License
    Open Source
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Showing 7 of 7 open-source tools