head to head · open source
changedetection.io vs DotnetSpider
changedetection.io has 34,295 GitHub stars, 2,063 forks, 385 open issues and last shipped yesterday. DotnetSpider has 4,139 stars, 1,052 forks, 6 open issues and last shipped 6 months ago. changedetection.io leads on adoption by 729% (34,295 vs 4,139 stars). changedetection.io is written in Python under Apache-2.0; DotnetSpider is written in C# under MIT. changedetection.io has attracted 6% as many forks as stars, DotnetSpider 25%. 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 | DotnetSpider | |
|---|---|---|
| GitHub stars | ★ 34K | ★ 4.1K |
| License | Apache-2.0 | MIT |
| Written in | Python | C# |
| Last push | 2026-09-17 | 2026-04-03 |
| Forks | ⑂ 2.1K | ⑂ 1.1K |
| 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 DotnetSpider if
- You want the DotnetSpider feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and DotnetSpider 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 DotnetSpider
DotnetSpider is an MIT licensed .NET Standard web crawling and scraping framework written in C , aimed at .NET developers who need to build high level crawlers that run either on a single machine or across a distributed cluster.
read the full DotnetSpider overview →
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Frequently asked questions
Is changedetection.io or DotnetSpider more popular?
changedetection.io has 34,295 GitHub stars and DotnetSpider has 4,139. changedetection.io has the larger community by that measure.
Are changedetection.io and DotnetSpider free?
Both are open source. changedetection.io is licensed under Apache-2.0 and DotnetSpider under MIT. Neither carries a licence fee.
What is the difference between changedetection.io and DotnetSpider?
changedetection.io is written in Python and DotnetSpider 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 DotnetSpider?
Choose changedetection.io if you want the larger community (34,295 stars) or its Apache-2.0 licence terms. Choose DotnetSpider if its feature set, stack or MIT licence fits better. Both are self-hostable.