Source: https://seerepo.com/compare/huggingface/peft/vs/vllm-project/vllm
Markdown source: https://seerepo.com/compare/huggingface/peft/vs/vllm-project/vllm.md
Description: peft and vllm share 9 technologies: Hugging Face, peft, torch, transformers, safetensors, datasets, torchvision, pillow, and psutil. Both are written in Python.

# peft vs vllm

peft and vllm share 9 technologies: Hugging Face, peft, torch, transformers, safetensors, datasets, torchvision, pillow, and psutil. Both are written in Python.

- [huggingface/peft](https://seerepo.com/r/huggingface/peft): 🤗 PEFT: State-of-the-art Parameter-Efficient Fine-Tuning.
- [vllm-project/vllm](https://seerepo.com/r/vllm-project/vllm): A high-throughput and memory-efficient inference and serving engine for LLMs

## What they share and what sets them apart

- In common: Hugging Face, peft, torch, transformers, safetensors, datasets, torchvision, pillow, psutil
- Only in peft: Gradio, bitsandbytes, accelerate, diffusers
- Only in vllm: FastAPI, axum, gitdb, pyzmq, Tokio, starlette, Ray, AIOHTTP, tower, mkdocs-material, indicatif, NVIDIA, OpenAI, quack-kernels, sentencepiece, einops, triton, torchaudio, MCP, tokenizers, tiktoken, markdown, markupsafe, pymdown-extensions, image, jinja2, Pydantic, msgspec, jsonschema, pydantic-core, opentelemetry-api, python-json-logger, tracing, prometheus-client, tracing-subscriber, OpenTelemetry, opentelemetry-sdk, prometheus-fastapi-instrumentator

## Side by side

| | peft | vllm |
|---|---|---|
| Size | 166,024 lines written, 272 code files | 2,375,117 lines written, 3,289 code files |
| Who writes it | 0.1% of its commits signed by AI. With Cursor and Claude Code | 12.8% of its commits signed by AI. With Claude Code, Codex, Gemini CLI, Cursor, GitHub Copilot, Devin, Mistral Vibe, CodeRabbit, Factory, and Qwen Code |
| Activity | Last push November 4, 2026, 1,934 commits, 21,873 stars | Last push November 4, 2026, 24,593 commits, 96,302 stars |
| Tests | 75 test files. 0.7% of its code files have a test that imports them | 2,419 test files. 60.2% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, peft or vllm?

vllm, with 2,375,117 lines written; peft has 166,024.

The proof: [vllm-project/vllm's code at commit 75f6761](https://github.com/vllm-project/vllm/tree/75f67614971a44050140e3422c1a65fe5004a72b)

### Which has more GitHub stars, peft or vllm?

vllm, with 96,302 stars; peft has 21,873.

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

### Which has more tests, peft or vllm?

vllm, with 2,419 test files; peft has 75.

The proof: [vllm-project/vllm's code at commit 75f6761](https://github.com/vllm-project/vllm/tree/75f67614971a44050140e3422c1a65fe5004a72b)

### Which was updated more recently, peft or vllm?

Both got their last push on November 4, 2026.

The proof: [huggingface/peft's commits on GitHub](https://github.com/huggingface/peft/commits)

### Which has more commits signed by AI, peft or vllm?

vllm: an AI signed 12.8% of its commits, with Claude Code, Codex, Gemini CLI, Cursor, GitHub Copilot, Devin, Mistral Vibe, CodeRabbit, Factory, and Qwen Code; in peft, 0.1%.

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

## Sources

- huggingface/peft: Read on November 5, 2026, at commit 574c7ca (https://github.com/huggingface/peft/tree/574c7cab277827d7383ae53a0e93e22cf816f476)
- vllm-project/vllm: Read on November 4, 2026, at commit 75f6761 (https://github.com/vllm-project/vllm/tree/75f67614971a44050140e3422c1a65fe5004a72b)

## 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.