head to head · open source
Uptime Kuma vs sitespeed.io
Uptime Kuma has 93,190 GitHub stars, 8,655 forks, 805 open issues and last shipped yesterday. sitespeed.io has 5,047 stars, 631 forks, 159 open issues and last shipped yesterday. Uptime Kuma leads on adoption by 1,746% (93,190 vs 5,047 stars). Uptime Kuma is written in JavaScript under MIT; sitespeed.io is written in JavaScript under MIT. Uptime Kuma has attracted 9% as many forks as stars, sitespeed.io 13%. 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 | sitespeed.io | |
|---|---|---|
| GitHub stars | ★ 93K | ★ 5.0K |
| License | MIT | MIT |
| Written in | JavaScript | JavaScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 8.7K | ⑂ 631 |
| 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 sitespeed.io if
- You want the sitespeed.io feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and sitespeed.io 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 sitespeed.io
sitespeed.io [![Downloads][downloads image]][downloads url] [![Docker][docker image]][docker url] [![Stars][stars image]][stars url] [![npm][npm image]][npm url] [![Changelog 212][changelog image]][changelog url] Website Documentation Changelog Bluesky Mastodon Table of Contents What is sitespeed.io? Documentation Installation Docker NodeJS Usage Basic usage Advanced configuration Mobile testing Examples Contributing Reporting issues Community License What is sitespeed.io? sitespeed.io is an Open Source web performance tool. Run it once to debug a slow page and you get an HTML report with Core Web Vitals, a…
read the full sitespeed.io overview →
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Frequently asked questions
Is Uptime Kuma or sitespeed.io more popular?
Uptime Kuma has 93,190 GitHub stars and sitespeed.io has 5,047. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and sitespeed.io free?
Both are open source. Uptime Kuma is licensed under MIT and sitespeed.io under MIT. Neither carries a licence fee.
What is the difference between Uptime Kuma and sitespeed.io?
Uptime Kuma is written in JavaScript and sitespeed.io 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, Uptime Kuma or sitespeed.io?
Choose Uptime Kuma if you want the larger community (93,190 stars) or its MIT licence terms. Choose sitespeed.io if its feature set, stack or MIT licence fits better. Both are self-hostable.