head to head · open source
changedetection.io vs fredy
changedetection.io has 34,312 GitHub stars, 2,064 forks, 385 open issues and last shipped today. fredy has 1,516 stars, 232 forks, 0 open issues and last shipped yesterday. changedetection.io leads on adoption by 2,163% (34,312 vs 1,516 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 15%. 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 | ★ 34K | ★ 1.5K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | JavaScript |
| Last push | 2026-09-18 | 2026-09-17 |
| Forks | ⑂ 2.1K | ⑂ 232 |
| 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 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
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 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 them…
read the full fredy overview →
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Frequently asked questions
Is changedetection.io or fredy more popular?
changedetection.io has 34,312 GitHub stars and fredy has 1,516. 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 (34,312 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.