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OpenRouter

closed / Overall score: 5.0(leading)

Commercial API gateway exposing models from many providers behind one OpenAI-compatible endpoint, with automatic failover, routing and unified billing across them. It runs as a hosted service and is a routing gateway rather than a chat interface.

Openness

1 high confidence

1.0

license: proprietary(hosted gateway)
source: closed(SDK present, core service closed)
self-host: none

A proprietary hosted routing gateway with no published source and no self-hosting: the closed counterpart to open gateways such as LiteLLM.

https://openrouter.ai/ recorded 2026-08-13
hosted unified API gateway across 400+ models/60+ providers; proprietary service (no self-host)
https://openrouter.ai/ recorded 2026-09-29
Homepage describes a hosted service: "Generate anything through a single, unified interface. All major models in one place." Searched the body for self-host, on-prem and license offers: none (the only open-source mention describes a third-party coding agent).
https://openrouter.ai/terms recorded 2026-09-29
Terms of service forbid "reverse engineering or otherwise attempting to discover the source code of any portion of the Service" and state that the Materials "are the property of OpenRouter or our third-party licensors". Searched the body for self-host, on-prem, open source and open-source: none.

Adoption

5 high confidence

5.0

Adoption is measured by OpenRouter's own reported user count, disclosed on its homepage, which clears the mass-market threshold. Because the vendor does not say whether that count is active or cumulative, it is read as a usage-volume signal rather than an active-user one.

https://openrouter.ai/ recorded 2026-06-04
vendor headline: 100T monthly tokens, 8M+ global users, 400+ models / 60+ providers
https://openrouter.ai/ recorded 2026-08-14
Homepage stat tiles: "200T+ Monthly Tokens", "10M+ Global Users", "80+ Providers", "500+ Models".
https://openrouter.ai/ recorded 2026-09-29
Homepage stat tiles: "10M+" Global Users, "500T+" Monthly Tokens, "80+" Providers and "500+" Models, beside "All major models in one place."
https://techcrunch.com/2026/05/26/openrouter-more-than-doubles-valuation-to-1-3b-in-a-year/ recorded 2026-06-04
corroborates ~100T tokens/mo and $1.3B valuation (May 2026)

Capability

5 high confidence

5.0

OpenRouter offers models from many providers behind one OpenAI-compatible API, with automatic routing and fallback, prepaid billing and provider and model rankings. It is a closed hosted service; LiteLLM is the comparable gateway that can be self-hosted.

https://openrouter.ai/ recorded 2026-08-13
400+ models, 60+ providers, routing/fallback, cost tracking, OpenAI-compat
https://openrouter.ai/ recorded 2026-09-29
Homepage lists "Fall back to other providers when one goes down." and "Protect your organization with fine grained data policies." alongside the stat tile "500+" Models and "80+" Providers, with a Rankings page in the navigation.
https://openrouter.ai/docs/quickstart recorded 2026-09-29
Quickstart says "It handles fallbacks automatically and picks the most cost-effective option for each request." and "You can also use the OpenAI SDK pointed at OpenRouter as a drop-in replacement."
https://openrouter.ai/pricing recorded 2026-09-29
Pricing page describes prepaid credits: "Buy credits" and usage "deducted from your credits".

Verified 2026-09-29