LiteLLM vs OpenRouter
The deciding row is not features — it is where your prompts physically go. LiteLLM runs in your VPC; OpenRouter is a hosted relay.
LiteLLM and OpenRouter are compared constantly, and the comparison usually goes wrong because they are different shapes of product. OpenRouter is a hosted aggregator: one endpoint, many models, nothing to deploy. LiteLLM is a library and proxy you run yourself. Both give you one API across many providers. Only one of them keeps the data path inside your own network — and for regulated buyers that is the entire decision.
Three gateways, five criteria
Each of the first two columns is a one-line read of the corresponding comparison page. The GateLLM column is our own position, not a third-party assessment — weigh it accordingly.
| Criterion | LiteLLM | OpenRouter | GateLLM |
|---|---|---|---|
| Deployment | Self-hosted OSS | SaaS only | Fully self-hosted (Docker / Helm), no vendor control plane |
| Billing anchor | Free OSS; Enterprise usage-priced | Token pass-through + credit/BYOK fees | Per-instance license; no token markup, no per-seat fee |
| Protocol entrypoints | OpenAI-centric | OpenAI-compatible | Four ingress x four egress (OpenAI / Anthropic / Gemini / DashScope) |
| Governance | SSO (5-user cap) / RBAC in Enterprise | Per-key controls, no org RBAC | SSO / SCIM / RBAC + per-key-group ACL and budget caps |
| Vendor independence | Independent (BerriAI) | Independent (Series B) | Independent (Fluxon LLC) |
When LiteLLM, when OpenRouter, when neither
Choose LiteLLM if the routing logic has to live in your own infrastructure and you are willing to operate it. You get provider fallback, cost tracking and an OpenAI-compatible surface with no third party in the request path.
Choose OpenRouter if you want zero deployment and the fastest path to many models — prototypes, internal tools, or workloads whose prompts are not sensitive. It is genuinely less work than running anything yourself.
Neither, if one provider and one team is your actual situation. OpenRouter adds a hop you do not need; LiteLLM adds a service you do not need. A gateway starts paying for itself at multi-provider failover, per-team cost attribution, or a data-residency requirement.