OpenRouter
Unified API gateway for 200+ LLMs across providers with usage-based billing on a single account.
OpenRouter is an unified API gateway for 200+ LLMs across providers with usage-based billing on a single account. Provides a single API endpoint to access over 200 LLMs from providers including OpenAI, Anthropic, Google, Meta, and Mistral.
About OpenRouter
OpenRouter is a hosted API gateway that gives you a single endpoint to reach over 200 LLMs from providers including OpenAI, Anthropic, Google, Meta, and Mistral, billed on one account.
Its edge is consolidation: usage-based billing is aggregated across every supported provider on one account, it supports bring-your-own-key so you can plug in existing provider keys, and its responses are OpenAI-compatible, making it a drop-in replacement for many existing integrations.
It fits teams that want to switch or compare models across vendors without wiring up each API separately or juggling multiple bills. It is less suitable if you need to self-host, since it is a managed hosted service, or if you expect the full catalog for free — the free tier only covers a subset of models — and it does add an intermediary routing layer between you and the upstream providers.
In its category it plays the aggregator role: instead of one vendor's models, it fronts many behind a single OpenAI-compatible interface.
Sources: openrouter.ai, this listing
What it does well
- Provides a single API endpoint to access over 200 LLMs from providers including OpenAI, Anthropic, Google, Meta, and Mistral.
- Aggregates usage-based billing across all supported providers on one account.
- Supports BYOK (bring your own key), allowing users to plug in existing provider API keys.
- Exposes OpenAI-compatible API responses, making it a drop-in replacement for many existing integrations.
Where it falls short
- Adds an intermediary routing layer between the user and the upstream model providers.
- Free tier is limited to a subset of models rather than full catalog access.
- Not self-hostable since it is a managed hosted gateway service.
Tagged
- Bring Your Own Key
- Supports Claude
- Supports GPT
- Supports Gemini
- Web-based
- Enterprise Plan
- Free
- Freemium
Compared with similar things
Picked by shared tags inside the AI Web Apps.
- 01Freemium →n8n
Open-source workflow automation with native LLM nodes — self-host on your own infrastructure.
- 02Freemium →LangSmith
Observability and evaluation for LLM apps — traces, datasets, A/B testing, and feedback collection.
- 03Freemium →Monica
All-in-one AI assistant browser extension — chat, summarise, rewrite, translate, and answer on any site.
- 04Freemium →LangChain
Most-used framework for building LLM applications with retrieval, agents, and chains.
- 05Freemium →Sider
ChatGPT + Claude sidebar for any browser tab — chat about the page, summarise, translate, draw.
- 06Freemium →HARPA AI
Hybrid agent + chat extension with website monitoring, summarisation, and natural-language automation.
Related reading
- How to Validate Your AI App Idea Before You Build It
The expensive mistake in the vibe-coding era isn't building the app — it's building the wrong one. You validate an AI app idea by talking to about eight people in your target market before you build, and listening for the single capability they all wish existed. That's your wedge. Higgsfield's founder did exactly that on the way to a ~$200M run-rate.
Read guide → - How to Launch Your AI App on Product Hunt
Launch on Product Hunt by preparing for a few weeks: build genuine account activity, line up your assets and a supporter list, and ship at 12:01 AM Pacific (the daily reset) on a weekday. Reply to every comment all day, never ask for upvotes (say 'check it out'), and keep working the week after — that's where most of the lasting value is.
Read guide → - How to Get Your AI App Cited by ChatGPT and Perplexity
To get cited by ChatGPT and Perplexity, be the clearest answer in several places at once. Publish answer-first pages with extractable facts, get listed on directories and review sites the engines crawl, and build consistent mentions across Reddit, YouTube, and your own site. Perplexity tends to favour recent content; ChatGPT appears to weight agreement across sources.
Read guide →
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</a>Frequently asked questions
- What is OpenRouter?
- OpenRouter is an unified API gateway for 200+ LLMs across providers with usage-based billing on a single account.
- Is OpenRouter free?
- OpenRouter offers a free tier and paid plans with higher limits or premium features.
- What platforms does OpenRouter support?
- OpenRouter runs on web.
- What category does OpenRouter belong to?
- OpenRouter is in the AI Web Apps category — Web apps with AI baked in — built for everything from journaling to research. Submitter-shipped products live here.
- What are the downsides of OpenRouter?
- Adds an intermediary routing layer between the user and the upstream model providers. Free tier is limited to a subset of models rather than full catalog access. Not self-hostable since it is a managed hosted gateway service.