LiteLLM vs OpenRouter
Both give you one interface to many models, but at different layers: LiteLLM is an open-source library/proxy you run; OpenRouter is a hosted API and marketplace. The choice hinges on control versus convenience.
At a glance
LiteLLM
- Model
- Open-source library + self-hosted proxy
- Control
- Full — you own routing, keys, data path
- Cost handling
- Bring your own provider keys
OpenRouter
- Model
- Hosted gateway / API
- Control
- Convenience — they manage routing and billing
- Cost handling
- Unified billing, marketplace pricing
Full comparison
| LiteLLM | OpenRouter | |
|---|---|---|
| Model | Open-source library + self-hosted proxy | Hosted gateway / API |
| Control | Full — you own routing, keys, data path | Convenience — they manage routing and billing |
| Cost handling | Bring your own provider keys | Unified billing, marketplace pricing |
| Observability | Self-hosted logging + integrations | Built-in dashboards |
| Data residency | Stays in your infra | Passes through their service |
Which should you choose?
Choose LiteLLM (or a similar self-hosted router) when data residency, cost control, and custom routing matter — most production cost work lands here. Choose OpenRouter when you want the fastest path to many models and don’t mind the hosted hop.
Frequently asked questions
What's the difference between LiteLLM and OpenRouter?
Both give you one interface to many models, but at different layers: LiteLLM is an open-source library/proxy you run; OpenRouter is a hosted API and marketplace. The choice hinges on control versus convenience.
Which should I choose, LiteLLM or OpenRouter?
Choose LiteLLM (or a similar self-hosted router) when data residency, cost control, and custom routing matter — most production cost work lands here. Choose OpenRouter when you want the fastest path to many models and don’t mind the hosted hop.