Source: https://seerepo.com/compare/Stirling-Tools/Stirling-PDF/vs/trycua/cua
Markdown source: https://seerepo.com/compare/Stirling-Tools/Stirling-PDF/vs/trycua/cua.md
Description: Stirling-PDF and cua share 5 technologies: React, Vite, FastAPI, Postgres, and PostHog. Stirling-PDF is written in TypeScript and cua in Rust.

# Stirling-PDF vs cua

Stirling-PDF and cua share 5 technologies: React, Vite, FastAPI, Postgres, and PostHog. Stirling-PDF is written in TypeScript and cua in Rust.

- [Stirling-Tools/Stirling-PDF](https://seerepo.com/r/Stirling-Tools/Stirling-PDF): #1 PDF Application on GitHub that lets you edit PDFs on any device anywhere
- [trycua/cua](https://seerepo.com/r/trycua/cua): Scale computer-use 2.0 with open-source drivers, cross-OS sandboxes, and benchmarks for training, evaluation, and data generation.

## What they share and what sets them apart

- In common: React, Vite, FastAPI, Postgres, PostHog
- Only in Stirling-PDF: Spring, Supabase, Stripe, AWS S3
- Only in cua: Flask, axum, Sentry, Claude

## Side by side

| | Stirling-PDF | cua |
|---|---|---|
| Size | 1,123,883 lines written, 4,330 code files | 2,541,798 lines written, 3,520 code files |
| Who writes it | 2.1% of its commits signed by AI. With GitHub Copilot, Claude Code, and Codex | 27.8% of its commits signed by AI. With Claude Code, Codex, GitHub Copilot, CodeRabbit, Factory, and Cursor |
| Activity | Last push October 29, 2026, 5,704 commits, 95,347 stars | Last push November 2, 2026, 5,587 commits, 31,513 stars |
| Tests | 2,034 test files. 48.5% of its code files have a test that imports them | 1,988 test files. 26.8% 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, Stirling-PDF or cua?

cua, with 2,541,798 lines written in 3,520 code files; Stirling-PDF has 1,123,883 in 4,330.

The proof: [trycua/cua's code at commit e6a88bf](https://github.com/trycua/cua/tree/e6a88bf12766b6ab85e4ab51aac6e5007588e747)

### Which has more GitHub stars, Stirling-PDF or cua?

Stirling-PDF, with 95,347 stars; cua has 31,513.

The proof: [Stirling-Tools/Stirling-PDF on GitHub](https://github.com/Stirling-Tools/Stirling-PDF)

### Which has more tests, Stirling-PDF or cua?

Stirling-PDF, with 2,034 test files; cua has 1,988.

The proof: [Stirling-Tools/Stirling-PDF's code at commit 025f763](https://github.com/Stirling-Tools/Stirling-PDF/tree/025f763f015243327d0de9079403c0436a8504e2)

### Which was updated more recently, Stirling-PDF or cua?

cua: its last push was on November 2, 2026, and Stirling-PDF's on October 29, 2026.

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

### Which has more commits signed by AI, Stirling-PDF or cua?

cua: an AI signed 27.8% of its commits, with Claude Code, Codex, GitHub Copilot, CodeRabbit, Factory, and Cursor; in Stirling-PDF, 2.1%.

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

## Sources

- Stirling-Tools/Stirling-PDF: Read on October 29, 2026, at commit 025f763 (https://github.com/Stirling-Tools/Stirling-PDF/tree/025f763f015243327d0de9079403c0436a8504e2)
- trycua/cua: Read on November 2, 2026, at commit e6a88bf (https://github.com/trycua/cua/tree/e6a88bf12766b6ab85e4ab51aac6e5007588e747)

## 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.