freellmpool › guide
All three put many LLM providers behind one interface, but they solve different problems. freellmpool pools providers' free tiers and is keyless to start; LiteLLM is a mature bring-your-own-keys SDK and proxy; OpenRouter is a hosted, pay-per-token aggregator with the widest model selection. Pick freellmpool to run on free tiers, LiteLLM to standardize calls across your own provider accounts, and OpenRouter when you want one paid bill for many frontier models.
| freellmpool | LiteLLM | OpenRouter | |
|---|---|---|---|
| Core idea | Pool providers' free tiers | Standardize calls to your provider keys | Hosted paid aggregator |
| Cost | Free | OSS; you pay providers | Pay per token (a few free models) |
| Keyless start | Yes (2 providers) | No | No |
| Install | pip install | pip install | API key |
| Interfaces | CLI, library, proxy, MCP | Library, proxy | API |
| Failover | Yes | Yes (router) | Yes |
| License | MIT (open source) | MIT (open source) | Proprietary service |
freellmpool's niche is squeezing the hosted free tiers: it routes each request to a provider you have capacity on, fails over on a 429, and tracks per-day usage. It's the only one of the three that is keyless out of the box and ships a first-class CLI and an MCP server. Best when you want free inference for drafting, classification, everyday coding, or running coding agents (Claude Code/Codex/Aider) for free. Trade-off: free-tier models are smaller than frontier models.
LiteLLM is the most mature of the three as a developer SDK and self-hosted proxy. If you already have provider accounts and want a battle-tested way to call 100+ models with one interface, plus budgets, logging, and team features, LiteLLM is the standard choice. It does not pool anyone's free tier for you.
OpenRouter is a hosted aggregator: one account and bill for a huge catalog of models, with routing and fallbacks. Best when you want breadth of frontier models without managing many provider accounts, and you're fine paying per token. It has a few rate-limited free models but isn't a free-first tool.
Yes. OpenRouter is one of the providers freellmpool can pool, so OpenRouter's free models become part of freellmpool's failover set. And freellmpool's proxy is OpenAI-compatible, so anything that points at an OpenAI base URL — including LiteLLM-based apps — can point at freellmpool instead.
pip install freellmpool
freellmpool ask "Explain the CAP theorem in one sentence." # free, no keyRelated: best free LLM API gateway · free alternative to OpenRouter.
Neither is strictly better — they target different needs. freellmpool pools providers' free tiers and is keyless to start, ideal for free inference and a CLI workflow. LiteLLM is a mature SDK/proxy for calling many models with your own keys at scale. Use freellmpool for free-tier usage, LiteLLM for bring-your-own-key production routing.
OpenRouter is a hosted, pay-per-token aggregator; freellmpool is a local, open-source tool that pools the providers' own free tiers and works with no API key to start. freellmpool can even include OpenRouter's free models in its pool.