Source: https://seerepo.com/r/huggingface/transformers/built
Markdown source: https://seerepo.com/r/huggingface/transformers/built.md
Description: transformers is a Python repo built with FastAPI. It deploys with psutil and uses Hugging Face. It has 1,811,568 written lines, with 1,742 test files.

# What is transformers built with?

transformers is a Python repo built with FastAPI. It deploys with psutil and uses Hugging Face. It has 1,811,568 written lines, with 1,742 test files.

Read on November 4, 2026, at commit fd3cf01.

Repository: https://github.com/huggingface/transformers

## Backend

### The base

- **[FastAPI](https://seerepo.com/uses/fastapi)**

### Services

- **Hugging Face**: 913 files · [src/transformers/audio_utils.py, line 30](https://github.com/huggingface/transformers/blob/fd3cf0140de03f7619ac95b5cfed05b711ff9e22/src/transformers/audio_utils.py#L30)

## Support

### Deploy

- **[psutil](https://seerepo.com/uses/psutil)**: 4 files

### Other

- **NumPy**: 447 files

## Other repos with a similar stack

- [vllm-project/vllm](https://seerepo.com/r/vllm-project/vllm/built): FastAPI, Hugging Face, psutil · [Compare](https://seerepo.com/compare/huggingface/transformers/vs/vllm-project/vllm)
- [Significant-Gravitas/AutoGPT](https://seerepo.com/r/Significant-Gravitas/AutoGPT/built): FastAPI, psutil
- [open-webui/open-webui](https://seerepo.com/r/open-webui/open-webui/built): FastAPI, psutil
- [langflow-ai/langflow](https://seerepo.com/r/langflow-ai/langflow/built): FastAPI, psutil
- [debpalash/VoiceStudio](https://seerepo.com/r/debpalash/VoiceStudio/built): FastAPI, psutil
- [plotly/dash](https://seerepo.com/r/plotly/dash/built): FastAPI, psutil

## Frequently asked questions

### What language is transformers written in?

transformers is written in Python, with 1,811,568 written lines.

### What framework does transformers use?

transformers is built with FastAPI.

### What services does transformers use?

transformers uses Hugging Face.

The proof: [src/transformers/audio_utils.py, line 30](https://github.com/huggingface/transformers/blob/fd3cf0140de03f7619ac95b5cfed05b711ff9e22/src/transformers/audio_utils.py#L30)

### Does transformers have tests?

Yes. transformers has 1,742 test files.

### Which repos have a stack like transformers's?

The ones that share most of its stack: vllm-project/vllm, Significant-Gravitas/AutoGPT, and open-webui/open-webui.

## 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.