head to head · open source
changedetection.io vs fredy
changedetection.io has 35,461 GitHub stars, 2,194 forks, 385 open issues and last shipped yesterday. fredy has 1,611 stars, 259 forks, 0 open issues and last shipped yesterday. changedetection.io leads on adoption by 2,101% (35,461 vs 1,611 stars). changedetection.io is written in Python under Apache-2.0; fredy is written in JavaScript under Apache-2.0. changedetection.io has attracted 6% as many forks as stars, fredy 16%. 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 | fredy | |
|---|---|---|
| GitHub stars | ★ 35K | ★ 1.6K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | JavaScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 2.2K | ⑂ 259 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick changedetection.io if
- You weight community size — 35K 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 fredy if
- You want the fredy feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches JavaScript
- You evaluated both and fredy fits your workflow better
About changedetection.io
Detect Website Changes Automatically — Monitor Web Page Changes in Real Time Monitor websites for updates — get notified via Discord, Email, Slack, Telegram, Webhook and many more. Detect web page content changes and get instant alerts. Ideal for monitoring price changes, content edits, conditional changes and more. [![Release Version][release shield]][release link] [![Docker Pulls][docker pulls]][docker link] [![License][license shield]](LICENSE.md) Get started with website page change monitoring straight away. Don't have time? Try our $8.99/month subscription, use our proxies and support! , half the price of…
read the full changedetection.io overview →
About fredy
Website Demo Quick Start Docs Fredy 🏡 Your Self Hosted Real Estate Finder for Europe Fredy watches 24 real estate portals across 🇩🇪 🇦🇹 🇨🇭 🇪🇸 🇮🇹 🇵🇹 for you (e.g. Immoscout, Kleinanzeigen etc), drops duplicates across platforms, and notifies you via Slack, Telegram, Email, ntfy, Discord and more the moment a new listing appears. Searches are managed from a Web UI, and you never see the same listing twice. On top of the listing itself, Fredy answers the three questions a portal will not: What would this cost me? Enter your income, living costs and savings once, and every listing is measured against…
read the full fredy overview →
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Frequently asked questions
Is changedetection.io or fredy more popular?
changedetection.io has 35,461 GitHub stars and fredy has 1,611. changedetection.io has the larger community by that measure.
Are changedetection.io and fredy free?
Both are open source. changedetection.io is licensed under Apache-2.0 and fredy under Apache-2.0. Neither carries a licence fee.
What is the difference between changedetection.io and fredy?
changedetection.io is written in Python and fredy in JavaScript. 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 fredy?
Choose changedetection.io if you want the larger community (35,461 stars) or its Apache-2.0 licence terms. Choose fredy if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.