Source: https://seerepo.com/compare/Aider-AI/aider/vs/py-pdf/pypdf
Markdown source: https://seerepo.com/compare/Aider-AI/aider/vs/py-pdf/pypdf.md
Description: aider and pypdf share 7 technologies: fonttools, cryptography, jinja2, markdown-it-py, markupsafe, mdurl, and pillow. Both are written in Python.

# aider vs pypdf

aider and pypdf share 7 technologies: fonttools, cryptography, jinja2, markdown-it-py, markupsafe, mdurl, and pillow. Both are written in Python.

- [Aider-AI/aider](https://seerepo.com/r/Aider-AI/aider): aider is AI pair programming in your terminal
- [py-pdf/pypdf](https://seerepo.com/r/py-pdf/pypdf): A pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files

## What they share and what sets them apart

- In common: fonttools, cryptography, jinja2, markdown-it-py, markupsafe, mdurl, pillow
- Only in aider: aiosqlite, gitdb, google-cloud-core, pyarrow, SQLite, diskcache, Mixpanel, PostHog, AIOHTTP, anyio, asgiref, FastAPI, starlette, tornado, Streamlit, cycler, just-the-docs, soupsieve, altair, contourpy, matplotlib, pydeck, Rich, prompt-toolkit, SQLAlchemy, Google, llama-index-instrumentation, llama-index-workflows, nltk, OpenAI, safetensors, scikit-learn, sentence-transformers, tiktoken, tokenizers, torch, transformers, litellm, llama-index-core, llama-index-embeddings-huggingface, filetype, imgcat, tinytag, beautifulsoup4, pypandoc, annotated-types, jsonschema-specifications, marshmallow, Pydantic, referencing, jsonschema, psutil
- Only in pypdf: alabaster, sphinx-rtd-theme, defusedxml, docutils, fpdf2, imagesize, mdit-py-plugins, myst-parser, sphinxcontrib-jquery, execnet

## Side by side

| | aider | pypdf |
|---|---|---|
| Size | 41,407 lines written, 93 code files | 85,910 lines written, 61 code files |
| Who writes it | 89.5% of its commits signed by AI. With Aider, Gemini CLI, Codex, and Claude Code | 1.5% of its commits signed by AI. With Claude Code, GitHub Copilot, Codex, and Cursor |
| Activity | Last push May 22, 2026, 12,461 commits, 50,099 stars | Last push November 13, 2026, 2,649 commits, 10,299 stars |
| Tests | 57 test files. 36.6% of its code files have a test that imports them | 47 test files. 55.7% 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, aider or pypdf?

pypdf, with 85,910 lines written; aider has 41,407.

The proof: [py-pdf/pypdf's code at commit 5f2fa46](https://github.com/py-pdf/pypdf/tree/5f2fa4697ea5cb14f35d769edd80e4d0f15af46e)

### Which has more GitHub stars, aider or pypdf?

aider, with 50,099 stars; pypdf has 10,299.

The proof: [Aider-AI/aider on GitHub](https://github.com/Aider-AI/aider)

### Which has more tests, aider or pypdf?

aider, with 57 test files; pypdf has 47.

The proof: [Aider-AI/aider's code at commit 5dc9490](https://github.com/Aider-AI/aider/tree/5dc9490bb35f9729ef2c95d00a19ccd30c26339c)

### Which was updated more recently, aider or pypdf?

pypdf: its last push was on November 13, 2026, and aider's on May 22, 2026.

The proof: [py-pdf/pypdf's commits on GitHub](https://github.com/py-pdf/pypdf/commits)

### Which has more commits signed by AI, aider or pypdf?

aider: an AI signed 89.5% of its commits, with Aider, Gemini CLI, Codex, and Claude Code; in pypdf, 1.5%.

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

## Sources

- Aider-AI/aider: Read on November 13, 2026, at commit 5dc9490 (https://github.com/Aider-AI/aider/tree/5dc9490bb35f9729ef2c95d00a19ccd30c26339c)
- py-pdf/pypdf: Read on November 13, 2026, at commit 5f2fa46 (https://github.com/py-pdf/pypdf/tree/5f2fa4697ea5cb14f35d769edd80e4d0f15af46e)

## 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.