book-to-skill vs crawl4ai
crawl4ai is much bigger: 86.2k stars against 36.0k. Over the days we have tracked them book-to-skill moved +16.8% and crawl4ai +2.4%, so book-to-skill is growing faster right now.
crawl4ai leads on customization. book-to-skill does not take any axis by a clear margin.
Stars and commit dates come from our own daily tracking. The six axes are read off each project's documentation by our review pipeline, so they describe what a project says about itself, not what we measured in its code.
Where they stand today
Converts books and document collections into cross-agent, on-demand 'skills' with per-chapter files so agents answer from real content without dumping entire books into context.
- Stars
- 36.0k
- Tracked growth
- +16.8%
- Maturity
- ●●●●●
- Last commit
- 6d ago
- Language
- Python
- License
- MIT
- Cost to run
- Free, local processing; external model API costs apply
Open-source crawler that turns any website into LLM-ready Markdown with full browser control and optional hosted cloud + agent MCP integration.
- Stars
- 86.2k
- Tracked growth
- +2.4%
- Maturity
- ●●●●●
- Last commit
- 2d ago
- Language
- Python
- License
- Apache-2.0
- Cost to run
- Free to self-host; Crawl4AI Cloud is pay-as-you-go (first $10 free promotion)
Six axes, head to head
Each axis runs 0 to 5. The label under a score is what that project's own docs claim, not a category average.
| Axis | book-to-skill | crawl4ai |
|---|---|---|
Context depth How much of your codebase it sees before it answers: the open diff, the diff plus related files, or the whole repository. | ●●●●● Whole-skill access | ●●●●● Whole-site crawl |
Noise control How it keeps output volume down — severity thresholds, deduplication, incremental runs over new commits only. | ●●●●● Validation & rules | ●●●●● Filters (BM25/LLM) |
Customization How far it bends to your team: custom rules, prompts, style guides, per-path config. | ●●●●● Config file + options | ●●●●● Extensive configs |
Privacy Whether your code stays on your own infrastructure: fully local, self-hostable, or cloud API only. | ●●●●● Local processing | ●●●●● Fully local possible |
Model freedom Whether you can point it at any provider, or it is wired to one. | ●●●●● BYO model | ●●●●● Bring-your-own models |
Setup ease What it takes to get a first useful run out of it. | ●●●●● One-command install | ●●●●● One-command setup |
Which one to pick
Pick book-to-skill if…
Privacy-first — processes documents locally into compact, on-demand agent skills to avoid hallucination and reduce token/token-costs when querying.
Pick crawl4ai if…
Privacy-first — self-host the browser and server to keep pages local while getting clean, LLM-friendly Markdown and structured extraction.
- Customization: Extensive configs (5/5 against 3/5)
What people want from each one
virgiliojr94/book-to-skill
Questions people ask
Is book-to-skill better than crawl4ai?
crawl4ai leads on customization. book-to-skill does not take any axis by a clear margin. book-to-skill is worth picking when privacy-first — processes documents locally into compact, on-demand agent skills to avoid hallucination and reduce token/token-costs when querying.
Which of book-to-skill and crawl4ai keeps my code private?
book-to-skill: Local processing (5/5). crawl4ai: Fully local possible (5/5).
What does each one cost to run?
book-to-skill: Free, local processing; external model API costs apply. crawl4ai: Free to self-host; Crawl4AI Cloud is pay-as-you-go (first $10 free promotion).
Full profiles: virgiliojr94/book-to-skill and unclecode/crawl4ai. Everything else in RAG & retrieval.