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LiteLLM

Free softwareOpen sourceLocal

Route model requests and track usage through one API.

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What you can use it for

Route model requests and track usage through one API.

  • Run a unified LLM API gateway on your own infrastructure instead of paying for a managed gateway workflow. LLM Gateway also offers free BYOK; this does not make already-free BYOK a paid feature. Provider tokens and hosting are separate costs. Firsthand evidence covers a self-hosted bridge and usage monitoring.
Workflow coverage and comparison notes

For the gateway and routing slice of OpenRouter: run a unified API on your own infrastructure with your own provider keys or local models. It does not include OpenRouter's hosted model catalogue or its free-model quota. Provider tokens, hosting and maintenance are separate costs. Firsthand evidence covers a self-hosted bridge and usage monitoring.

Before you switch

MIT core; enterprise-directory features have separate commercial terms. Requires deployment, upgrades and provider credentials. Unlike OpenRouter, it has no hosted model catalogue or free-model quota. Model calls and hosting are separate costs, and provider compatibility varies.

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Each comparison covers the workflow described above, rather than every paid feature.

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