UnoRouter: the open source OpenRouter alternative
OpenRouter is closed source. UnoRouter does the same one key, 200+ model job with the entire stack public under OSI licenses, self hostable, and with a hosted free tier to test on.
Searching for an open source OpenRouter alternative usually means one of three things: you want to read the code that handles your prompts, you want to run the gateway yourself, or you want out of a black box. UnoRouter covers all three. Same one key, 200+ model setup, whole stack public.
Why open source matters in a gateway
A gateway sits between your app and every model you call, so it sees every prompt and every reply. With a closed gateway you trust a privacy page. With an open one you can check what gets logged, how keys are stored, and how requests are routed before anything sensitive leaves your machine.
What is actually open
Everything is public on GitHub under OSI licenses: the web frontend with the chat client, the gateway itself, the Discord bot, and the provider sync that keeps the catalog fresh. This is not a thin SDK wrapped around a closed core. The running product is the repo.
Against the usual picks
OpenRouter has the widest catalog, but every line of it is closed. LiteLLM is genuinely open and a solid self hosted proxy, but it is bring your own keys plumbing: you still manage provider accounts and there is no hosted catalog. UnoRouter sits between the two, open like LiteLLM, hosted with one key and 200+ models like OpenRouter.
Self host it or just use it
Clone the repos and run the stack yourself, or point any OpenAI compatible client at https://api.unorouter.com/v1 and use the hosted version. The hosted free tier covers most of the catalog, so you can test either path before committing to it.
The short version
If all you need is local routing over your own provider keys, LiteLLM is the leaner tool. If you want an OpenRouter style hosted gateway where you can read, audit, and fork the entire stack, UnoRouter is the one that ships its source.
Ready to try it? Create a free account or browse the models.
SpicyChat is a zero-setup RP site with fixed models. UnoRouter keeps the ease but adds lorebook depth, 200+ models you choose, and a key that also runs coding agents.
Agnai is an open-source, multi-engine RP frontend with memory books and scenarios, BYOK. UnoRouter has the same depth hosted, where the key is the account and also runs coding agents.
Open WebUI is a self-hosted, Ollama-first chat UI you run and key up. UnoRouter is 200+ hosted models on one key, no infra, plus a real character client, and the key codes too.