head to head · open source
Crawl4AI vs TumblThree
Crawl4AI has 86,783 GitHub stars, 9,043 forks, 188 open issues and last shipped yesterday. TumblThree has 742 stars, 87 forks, 38 open issues and last shipped 16 days ago. Crawl4AI leads on adoption by 11,596% (86,783 vs 742 stars). Crawl4AI is written in Python under Apache-2.0; TumblThree is written in C# under MIT. Crawl4AI has attracted 10% as many forks as stars, TumblThree 12%. Crawl4AI was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (crawler), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Crawl4AI | TumblThree | |
|---|---|---|
| GitHub stars | ★ 87K | ★ 742 |
| License | Apache-2.0 | MIT |
| Written in | Python | C# |
| Last push | 2026-11-02 | 2026-10-18 |
| Forks | ⑂ 9.0K | ⑂ 87 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Crawl4AI if
- You weight community size — 87K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick TumblThree if
- You want the TumblThree feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and TumblThree fits your workflow better
About Crawl4AI
🚀🤖 Crawl4AI: Open source LLM Friendly Web Crawler & Scraper. 🚀 Crawl4AI Cloud API — Closed Beta (Launching Soon) Reliable, large scale web extraction, now built to be drastically more cost effective than any of the existing solutions. 👉 Apply here for early access We’ll be onboarding in phases and working closely with early users. Limited slots. Crawl4AI turns the web into clean, LLM ready Markdown for RAG, agents, and data pipelines. Fast, controllable, battle tested by a 50k+ star community. ✨ Check out latest update v0.9.3 ✨ New in v0.9.3 : Security release. Closes five coordinated disclosure advisories…
read the full Crawl4AI overview →
About TumblThree
TumblThree A Tumblr Blog Backup Application TumblThree is a free and open source Tumblr and Twitter blog backup application. It downloads photo, video, audio and text posts from a given Tumblr or Twitter blog. It is the code rewrite of TumblTwo, using the Win Application Framework (WAF) and C with WPF and the MVVM pattern. Features Source code at GitHub (written in C using WPF and MVVM) Multiple concurrent downloads of a single blog and/or different blogs A clipboard monitor that detects blogname.tumblr.com urls in the clipboard (copy and paste) and automatically adds the blog to the bloglist A settings panel…
read the full TumblThree overview →
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Frequently asked questions
Is Crawl4AI or TumblThree more popular?
Crawl4AI has 86,783 GitHub stars and TumblThree has 742. Crawl4AI has the larger community by that measure.
Are Crawl4AI and TumblThree free?
Both are open source. Crawl4AI is licensed under Apache-2.0 and TumblThree under MIT. Neither carries a licence fee.
What is the difference between Crawl4AI and TumblThree?
Crawl4AI is written in Python and TumblThree in C#. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Crawl4AI or TumblThree?
Choose Crawl4AI if you want the larger community (86,783 stars) or its Apache-2.0 licence terms. Choose TumblThree if its feature set, stack or MIT licence fits better. Both are self-hostable.