Source: https://seerepo.com/compare/rohitg00/ai-engineering-from-scratch/vs/VectifyAI/PageIndex
Markdown source: https://seerepo.com/compare/rohitg00/ai-engineering-from-scratch/vs/VectifyAI/PageIndex.md
Description: ai-engineering-from-scratch and PageIndex share 4 technologies: Anthropic, OpenAI, MCP, and pillow. Both are written in Python.

# ai-engineering-from-scratch vs PageIndex

ai-engineering-from-scratch and PageIndex share 4 technologies: Anthropic, OpenAI, MCP, and pillow. Both are written in Python.

- [rohitg00/ai-engineering-from-scratch](https://seerepo.com/r/rohitg00/ai-engineering-from-scratch): Learn AI Engineering! Learn it. Build it. Ship it for others.
- [VectifyAI/PageIndex](https://seerepo.com/r/VectifyAI/PageIndex): 📑 PageIndex: Document Index for Vectorless, Reasoning-based RAG

## What they share and what sets them apart

- In common: Anthropic, OpenAI, MCP, pillow
- Only in ai-engineering-from-scratch: Hono, matplotlib, accelerate, librosa, tokenizers, torchaudio, transformers, torch, scikit-learn, torchvision, tiktoken, datasets, google-adk, LangChain, shiki, Zod, @hono/node-server, @mastra/core
- Only in PageIndex: Claude, openai-agents, litellm, pypdf2, pypdfium2

## Side by side

| | ai-engineering-from-scratch | PageIndex |
|---|---|---|
| Size | 506,014 lines written, 2,340 code files | 53,287 lines written, 99 code files |
| Who writes it | 0.8% of its commits signed by AI. With Claude Code and Devin | 5.4% of its commits signed by AI. With Claude Code and GitHub Copilot |
| Activity | Last push November 4, 2026, 2,431 commits, 76,859 stars | Last push November 6, 2026, 503 commits, 40,110 stars |
| Tests | 781 test files. 17.3% of its code files have a test that imports them | 14 test files. 29.3% 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, ai-engineering-from-scratch or PageIndex?

ai-engineering-from-scratch, with 506,014 lines written; PageIndex has 53,287.

The proof: [rohitg00/ai-engineering-from-scratch's code at commit 8fec9cc](https://github.com/rohitg00/ai-engineering-from-scratch/tree/8fec9cc19ee7c73b92582899b5455333d30d718e)

### Which has more GitHub stars, ai-engineering-from-scratch or PageIndex?

ai-engineering-from-scratch, with 76,859 stars; PageIndex has 40,110.

The proof: [rohitg00/ai-engineering-from-scratch on GitHub](https://github.com/rohitg00/ai-engineering-from-scratch)

### Which has more tests, ai-engineering-from-scratch or PageIndex?

ai-engineering-from-scratch, with 781 test files; PageIndex has 14.

The proof: [rohitg00/ai-engineering-from-scratch's code at commit 8fec9cc](https://github.com/rohitg00/ai-engineering-from-scratch/tree/8fec9cc19ee7c73b92582899b5455333d30d718e)

### Which was updated more recently, ai-engineering-from-scratch or PageIndex?

PageIndex: its last push was on November 6, 2026, and ai-engineering-from-scratch's on November 4, 2026.

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

### Which has more commits signed by AI, ai-engineering-from-scratch or PageIndex?

PageIndex: an AI signed 5.4% of its commits, with Claude Code and GitHub Copilot; in ai-engineering-from-scratch, 0.8%.

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

## Sources

- rohitg00/ai-engineering-from-scratch: Read on November 4, 2026, at commit 8fec9cc (https://github.com/rohitg00/ai-engineering-from-scratch/tree/8fec9cc19ee7c73b92582899b5455333d30d718e)
- VectifyAI/PageIndex: Read on November 6, 2026, at commit 2ac8694 (https://github.com/VectifyAI/PageIndex/tree/2ac8694bf8fe89a3840dda9bdb88db5119b77fc4)

## 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.