Otari by Mozilla AI: open-source AI gateway for any model

Open-source AI gateway by Mozilla AI
Put open-weight and frontier models behind one API key. See what drives spend, cap it before it runs over, and send each request to the right model.
Send your first request in minutes. Mozilla AI runs it for you.
Run the open-source gateway on your own infrastructure, free.
Hosted or self-hosted, with Mozilla AI by your side: deployment, support and the features your team needs.
Create a free account. Sign up with GitHub, Google or email, and create an API key.
Point your agent at Otari. Set the base URL, your API key and a model. Every request shows up in Activity.
Open-weight and frontier models through one OpenAI- and Anthropic-compatible API.
Web search, web fetch and code execution for any model, open-weight included.
A key for every person, team or agent, and spend caps that stop requests at the limit.
Every request with its tokens, cost and errors. Filter to find where an agent failed.
Cost, tokens and requests by model, person or API key, down to the hour.
Automatic fallback between providers.
Providers, coding agents and SDKs that work with Otari today. Any tool that speaks the OpenAI or Anthropic API works too.
Open source. You run it and pay for your own infrastructure.
Top up, then pay as you go. No fee on your own provider keys.
Early access pricing
The best open-weight models, with tools and guardrails built in. Early access prices, no service fee.
Otari is built by Mozilla AI, part of the Mozilla family. We help companies run AI on any model, open-weight or frontier, and keep its cost in view.
Your first request is five minutes away. Start free on otari.ai, or self-host the open-source gateway.