head to head · open source
Uptime Kuma vs Zabbix
Uptime Kuma has 93,190 GitHub stars, 8,655 forks, 805 open issues and last shipped yesterday. Zabbix has 6,529 stars, 1,275 forks, 108 open issues and last shipped yesterday. Uptime Kuma leads on adoption by 1,327% (93,190 vs 6,529 stars). Uptime Kuma is written in JavaScript under MIT; Zabbix is written in Go Template under AGPL-3.0. Uptime Kuma has attracted 9% as many forks as stars, Zabbix 20%. Zabbix 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.
← all 20902 open source comparisons
Side by side
| Uptime Kuma | Zabbix | |
|---|---|---|
| GitHub stars | ★ 93K | ★ 6.5K |
| License | MIT | AGPL-3.0 |
| Written in | JavaScript | Go Template |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 8.7K | ⑂ 1.3K |
| 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 Zabbix if
- You want the Zabbix feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Go Template
- You evaluated both and Zabbix 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 Zabbix
An enterprise class, open source distributed monitoring solution that’s designed to monitor the performance and availability of network devices, servers, services, and other IT resources. Zabbix is a flexible solution that can monitor anything from a simple, standalone application to a large scale environment, with features including: Resource discovery: Discover network entities, server resources, and onboard/offboard devices. Use out of the box integrations (templates) to monitor anything form a low level device to a SAAS service. Metric acquisition: Use an agent or agent less approach for metric acquisition…
read the full Zabbix overview →
More in Infrastructure & Operations
Related comparisons
More Monitoring & Observability projects
Compare either of these against the rest of the Monitoring & Observability field.
Frequently asked questions
Is Uptime Kuma or Zabbix more popular?
Uptime Kuma has 93,190 GitHub stars and Zabbix has 6,529. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and Zabbix free?
Both are open source. Uptime Kuma is licensed under MIT and Zabbix under AGPL-3.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and Zabbix?
Uptime Kuma is written in JavaScript and Zabbix in Go Template. 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 Zabbix?
Choose Uptime Kuma if you want the larger community (93,190 stars) or its MIT licence terms. Choose Zabbix if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.