head to head · open source
vllm vs unbody
vllm has 92,055 GitHub stars, 22,349 forks, 7,953 open issues and last shipped yesterday. unbody has 524 stars, 47 forks, 3 open issues and last shipped 5 months ago. vllm leads on adoption by 17,468% (92,055 vs 524 stars). vllm is written in Python under Apache-2.0; unbody is written in TypeScript under Apache-2.0. vllm has attracted 24% as many forks as stars, unbody 9%. vllm was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| vllm | unbody | |
|---|---|---|
| GitHub stars | ★ 92K | ★ 524 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-09-18 | 2026-04-14 |
| Forks | ⑂ 22K | ⑂ 47 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick vllm if
- You weight community size — 92K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick unbody if
- You want the unbody feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and unbody fits your workflow better
About vllm
vLLM is a high throughput, memory efficient Python library for LLM inference and serving, built for ML engineers and platform teams who need to run open weight models on their own hardware at production scale.
About unbody
Unbody is an Apache 2.0, TypeScript, modular open source backend for building AI native software that is designed for knowledge rather than static data, and it is aimed at developers and teams that want to self host the ingestion, indexing and retrieval layer behind chat, search and agentic applications.
read the full unbody overview →
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Frequently asked questions
Is vllm or unbody more popular?
vllm has 92,055 GitHub stars and unbody has 524. vllm has the larger community by that measure.
Are vllm and unbody free?
Both are open source. vllm is licensed under Apache-2.0 and unbody under Apache-2.0. Neither carries a licence fee.
What is the difference between vllm and unbody?
vllm is written in Python and unbody in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, vllm or unbody?
Choose vllm if you want the larger community (92,055 stars) or its Apache-2.0 licence terms. Choose unbody if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.