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Best tools·AI Gateways & Routers·API-First

Best AI Gateways & Routers for API-First

6 AI Gateways & Routers tools ranked by GitHub activity, community traction, and use‑case match — as of 2026-05-26.

Ranked by signal score (GitHub stars × 0.5 + PH votes × 0.3 + use-case tag match × 0.2). Data as of 2026-05-26. How we rank →

6 tools

  1. 01

    BerriAI

    litellm

    Python SDK, Proxy Server (AI Gateway) to call 100+ LLM APIs in OpenAI (or native) format, with cost tracking, guardrails, loadbalancing and logging. [Bedrock, Azure, OpenAI, VertexAI, Cohere, Anthropic, Sagemaker, HuggingFace, VLLM, NVIDIA NIM]

    47,739
    AI Gateways & RoutersWebsite →
  2. 02

    Helicone

    Helicone

    Open-source LLM observability with built-in caching, gateway, and rate limiting.

    5,677Open-source
    AI ObservabilityWebsite →
  3. 03

    adaline

    gateway

    The only fully local production-grade Super SDK that provides a simple, unified, and powerful interface for calling more than 200+ LLMs.

    594Open-source
    AI Gateways & RoutersWebsite →
  4. 04

    OpenRouter

    OpenRouter

    Unified OpenAI-compatible API for 200+ LLMs with provider routing and failover.

    AI Gateways & RoutersWebsite →
  5. 05

    Vercel

    Vercel AI Gateway

    OpenAI-compatible gateway with provider routing, observability, and cost tracking.

    AI Gateways & RoutersWebsite →
  6. 06

    Portkey

    Portkey

    AI gateway with prompt versioning, caching, governance, and 50+ provider integrations.

    AI Gateways & RoutersWebsite →

How we chose

Signal score weights: GitHub stars (50%), ProductHunt votes (30%), use-case tag match (20%). Minimum 4 qualifying tools per page. Only tools in published state with ≥80% data completeness included.

Full methodology →

Related

Questions

What is the best AI Gateways & Routers tool for API-First?
Based on signal score, litellm leads this list with 47,739 GitHub stars. It is categorized under AI Gateways & Routers.
How do these AI Gateways & Routers tools compare on price?
Helicone: Open-source. gateway: Open-source.
Which of these tools works best with API-First?
Tools with the highest use-case tag match for API-First in this list: litellm, Helicone, gateway. Use-case match is one of three signals in our ranking; see the methodology link above for how it's weighted.
Are there open-source options in this list?
Helicone (Apache-2.0), gateway (MIT).
How often is this list updated?
GitHub stats refresh weekly. ProductHunt votes refresh weekly. Pricing data refreshes daily. This page last verified 2026-05-26.