head to head · open source
changedetection.io vs TumblThree
changedetection.io has 34,312 GitHub stars, 2,064 forks, 385 open issues and last shipped yesterday. TumblThree has 735 stars, 86 forks, 38 open issues and last shipped 13 days ago. changedetection.io leads on adoption by 4,568% (34,312 vs 735 stars). changedetection.io is written in Python under Apache-2.0; TumblThree is written in C# under MIT. changedetection.io has attracted 6% as many forks as stars, TumblThree 12%. changedetection.io was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| changedetection.io | TumblThree | |
|---|---|---|
| GitHub stars | ★ 34K | ★ 735 |
| License | Apache-2.0 | MIT |
| Written in | Python | C# |
| Last push | 2026-09-18 | 2026-09-06 |
| Forks | ⑂ 2.1K | ⑂ 86 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick changedetection.io if
- You weight community size — 34K 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 changedetection.io
changedetection.io is an open source website change detection and web page monitoring tool written in Python and released under the Apache 2.0 license. It watches URLs, detects when their content changes, and sends alerts through channels such as Discord, Email, Slack, Telegram, and Webhook. The project lives in the Data & Analytics / Data Extraction & Web Scraping ecosystem, carries more than 34,000 stars and 2,000 forks on GitHub, and has been developed for roughly six years. It is designed to be self hosted, and the same codebase also backs a hosted subscription service offered by the maintainers.…
read the full changedetection.io overview →
About TumblThree
TumblThree is a free and open source Windows desktop application, written in C with WPF, that downloads photo, video, audio and text posts from a given Tumblr or Twitter blog and keeps that content locally.
read the full TumblThree overview →
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Frequently asked questions
Is changedetection.io or TumblThree more popular?
changedetection.io has 34,312 GitHub stars and TumblThree has 735. changedetection.io has the larger community by that measure.
Are changedetection.io and TumblThree free?
Both are open source. changedetection.io is licensed under Apache-2.0 and TumblThree under MIT. Neither carries a licence fee.
What is the difference between changedetection.io and TumblThree?
changedetection.io 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, changedetection.io or TumblThree?
Choose changedetection.io if you want the larger community (34,312 stars) or its Apache-2.0 licence terms. Choose TumblThree if its feature set, stack or MIT licence fits better. Both are self-hostable.