Source: https://seerepo.com/uses/ray
Markdown source: https://seerepo.com/uses/ray.md
Description: 10 public repos that SeeRepo read use Ray. It's used most with FastAPI, AIOHTTP, and uvicorn.

# Open source repos that use Ray

10 public repos that SeeRepo read use Ray. It's used most with FastAPI, AIOHTTP, and uvicorn.

## Used most with

- FastAPI: 7 repos
- AIOHTTP: 6 repos
- uvicorn: 4 repos
- Hugging Face: 3 repos
- torch: 3 repos
- transformers: 3 repos
- matplotlib: 3 repos
- Redis: 2 repos

## The repos, by stars

1. [vllm-project/vllm](https://seerepo.com/r/vllm-project/vllm): Python · 96,790 stars · 14% signed by AI — A high-throughput and memory-efficient inference and serving engine for LLMs
2. [run-llama/llama_index](https://seerepo.com/r/run-llama/llama_index): Python · 52,885 stars · 0.2% signed by AI — LlamaIndex is the document processing platform for AI
3. [ray-project/ray](https://seerepo.com/r/ray-project/ray): Python · 44,282 stars · 3.7% signed by AI — Ray is an AI compute engine. Ray consists of a core distributed runtime and a set of AI Libraries for accelerating ML workloads.
4. [hpcaitech/ColossalAI](https://seerepo.com/r/hpcaitech/ColossalAI): Python · 41,424 stars · 0.3% signed by AI — Making large AI models cheaper, faster and more accessible
5. [PrefectHQ/prefect](https://seerepo.com/r/PrefectHQ/prefect): Python · 24,112 stars · 9.7% signed by AI — Prefect is a workflow orchestration framework for building resilient data pipelines in Python.
6. [modelscope/ms-swift](https://seerepo.com/r/modelscope/ms-swift): Python · 16,058 stars · 0.3% signed by AI — Use PEFT or Full-parameter to CPT/SFT/DPO/GRPO 600+ LLMs (Qwen3.8, DeepSeek-V4, GLM-5.1, InternLM3, Llama4, ...) and 300+ MLLMs (Qwen3-VL, Qwen3-Omni, InternVL3.5, Ovis2.5, GLM5.3, Gemma4, Llava, Phi4, ...) (AAAI 2025).
7. [LMCache/LMCache](https://seerepo.com/r/LMCache/LMCache): Python · 12,336 stars · 4% signed by AI — LMCache: Supercharge Your LLM with the Fastest KV Cache Layer
8. [skypilot-org/skypilot](https://seerepo.com/r/skypilot-org/skypilot): Python · 10,826 stars · 16.4% signed by AI — The AI Compute Platform for frontier teams. SkyPilot turns fragmented AI compute into one AI supercomputer, so frontier AI teams build custom intelligence faster.
9. [hydra-ecosystem/hydra](https://seerepo.com/r/hydra-ecosystem/hydra): Python · 10,744 stars · 0.4% signed by AI — Hydra is a framework for elegantly configuring complex applications
10. [OpenRLHF/OpenRLHF](https://seerepo.com/r/OpenRLHF/OpenRLHF): Python · 10,152 stars · 1.8% signed by AI — An Easy-to-use, Scalable and High-performance Agentic RL Framework based on Ray (PPO & DAPO & REINFORCE++ & VLM & TIS & vLLM & Ray & Async RL)

## Frequently asked questions

### What is the most popular open source repo that uses Ray?

vllm-project/vllm, with 96,790 stars on GitHub.

The proof: [vllm-project/vllm on GitHub](https://github.com/vllm-project/vllm)

### What other technologies is Ray used with?

With FastAPI (7), AIOHTTP (6), uvicorn (4), Hugging Face (3), and torch (3), out of the 10 repos that use it.

### What languages are the repos that use Ray written in?

Python (10).

### How many repos that use Ray have commits signed by AI?

10 of the 10; the most, skypilot-org/skypilot, with 16.4% of its commits.

The proof: [the commits each tool signed in skypilot-org/skypilot](https://seerepo.com/r/skypilot-org/skypilot/ai)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.