head to head · open source
Uptime Kuma vs alerta
Uptime Kuma has 93,190 GitHub stars, 8,655 forks, 805 open issues and last shipped yesterday. alerta has 2,533 stars, 377 forks, 34 open issues and last shipped 17 days ago. Uptime Kuma leads on adoption by 3,579% (93,190 vs 2,533 stars). Uptime Kuma is written in JavaScript under MIT; alerta is written in Python under Apache-2.0. Uptime Kuma has attracted 9% as many forks as stars, alerta 15%. Uptime Kuma was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (monitoring), 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
| Uptime Kuma | alerta | |
|---|---|---|
| GitHub stars | ★ 93K | ★ 2.5K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Python |
| Last push | 2026-11-02 | 2026-10-17 |
| Forks | ⑂ 8.7K | ⑂ 377 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Uptime Kuma if
- You weight community size — 93K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick alerta if
- You want the alerta feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and alerta fits your workflow better
About Uptime Kuma
Uptime Kuma Uptime Kuma is an easy to use self hosted monitoring tool. 🥔 Live Demo Try it! Demo Server (Location: Frankfurt Germany): It is a temporary live demo, all data will be deleted after 10 minutes. Sponsored by Uptime Kuma Sponsors. ⭐ Features Monitoring uptime for HTTP(s) / TCP / HTTP(s) Keyword / HTTP(s) Json Query / Websocket / Ping / DNS Record / Push / Steam Game Server / Docker Containers Fancy, Reactive, Fast UI/UX Notifications via Telegram, Discord, Gotify, Slack, Pushover, Email (SMTP), and 90+ notification services, click here for the full list 20 second intervals Multi Languages Multiple…
read the full Uptime Kuma overview →
About alerta
Alerta Release 9.1 ================== The Alerta monitoring tool was developed with the following aims in mind: distributed and de coupled so that it is SCALABLE minimal CONFIGURATION that easily accepts alerts from any source quick at a glance VISUALISATION with drill down to detail Requirements Release 9 only supports Python 3.9 or higher. The only mandatory dependency is MongoDB or PostgreSQL. Everything else is optional. Postgres version 13 or better MongoDB version 6.0 or better Installation To install MongoDB on Debian/Ubuntu run: $ sudo apt get install y mongodb org $ mongod To install MongoDB on…
read the full alerta overview →
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Frequently asked questions
Is Uptime Kuma or alerta more popular?
Uptime Kuma has 93,190 GitHub stars and alerta has 2,533. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and alerta free?
Both are open source. Uptime Kuma is licensed under MIT and alerta under Apache-2.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and alerta?
Uptime Kuma is written in JavaScript and alerta in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Uptime Kuma or alerta?
Choose Uptime Kuma if you want the larger community (93,190 stars) or its MIT licence terms. Choose alerta if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.