One API vs OpenLLM
A side-by-side comparison of two self-hosted local llm runners options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | One API | OpenLLM |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 61 · Good | 81 · Excellent |
| Category | Local LLM Runners | Local LLM Runners |
| License | MIT | Apache-2.0 |
| Language | Go | Python |
| Setup difficulty | Medium | Medium |
| Min. RAM | 256 MB | 8,192 MB |
| Deployment | docker, binary | docker, kubernetes, bare-metal |
| GitHub stars | ★ 37,009 | ★ 12,547 |
| First released | 2023 | 2023 |
| Replaces | OpenAI API, OpenRouter | OpenAI API |
What are One API and OpenLLM?
One API
One API is an LLM API management and distribution system that exposes a single OpenAI-compatible endpoint while routing to many upstream providers. It adds key management, channel load balancing, usage tracking and multi-user billing.
- Unified OpenAI-compatible API
- Channel load balancing
- Token and quota management
- Multi-user support
OpenLLM
OpenLLM lets developers run open-source large language models as OpenAI-compatible API endpoints with a single command. It is built on BentoML and supports streaming, quantization, and easy deployment.
- One-command model serving
- OpenAI-compatible API
- Built-in chat UI
- Cloud deployment via BentoML
One API vs OpenLLM: key differences
One API is written in Go, while OpenLLM is built with Python. Licensing differs — MIT for One API versus Apache-2.0 for OpenLLM. One API is the lighter option, starting around 256 MB of RAM against 8,192 MB for OpenLLM. One API has the considerably larger community, at 37,009 GitHub stars versus 12,547.
Why pick each one
Choose One API if…
- Single OpenAI-compatible endpoint
- Built-in usage billing
- Easy Docker deployment
Watch out for
- Documentation mostly Chinese
- Scaling needs external database
Choose OpenLLM if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Kubernetes-ready with Helm charts available
- Mature project with 12.5k GitHub stars
Frequently asked questions
Is One API or OpenLLM better?
Neither is universally better. One API has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are One API and OpenLLM free and open-source?
Yes. One API is licensed under MIT and OpenLLM under Apache-2.0. Both can be self-hosted at no software cost.
Can I run One API and OpenLLM with Docker?
One API: yes. OpenLLM: yes.
Which is lighter on resources, One API or OpenLLM?
One API has the smaller minimum footprint at 256 MB of RAM, compared to about 8,192 MB for OpenLLM. Real-world usage depends on library size, user count, and enabled features.