Openrouter Vs Litellm

OpenRouter's own comparison with LiteLLM frames the choice as a question of where the routing layer runs, meaning the service that forwards an application's requests to AI model providers. OpenRouter runs that layer for customers as a managed service. LiteLLM is a proxy a team deploys in its own infrastructure, which the article says keeps request data on the team's network until it reaches the provider, in exchange for operating the database, cache and containers itself. Because the article is written by OpenRouter, it is a vendor's account of the trade-off.

Self-hosting the gateway still sends requests onward to whichever external model provider is selected. The article notes that teams with strict data-residency rules should review OpenRouter's routing and Zero Data Retention controls, and that the two can be combined: LiteLLM's documentation describes calling OpenRouter models through LiteLLM. The decision therefore concerns who controls and operates the routing layer and the path request data takes, not whether providers are involved.