head to head · open source
Uptime Kuma vs opencost
Uptime Kuma has 93,190 GitHub stars, 8,655 forks, 805 open issues and last shipped yesterday. opencost has 6,802 stars, 916 forks, 306 open issues and last shipped 5 days ago. Uptime Kuma leads on adoption by 1,270% (93,190 vs 6,802 stars). Uptime Kuma is written in JavaScript under MIT; opencost is written in Go under Apache-2.0. Uptime Kuma has attracted 9% as many forks as stars, opencost 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 | opencost | |
|---|---|---|
| GitHub stars | ★ 93K | ★ 6.8K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Go |
| Last push | 2026-11-02 | 2026-10-29 |
| Forks | ⑂ 8.7K | ⑂ 916 |
| 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 opencost if
- You want the opencost feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and opencost 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 opencost
OpenCost — your favorite open source cost monitoring tool for Kubernetes and cloud spend OpenCost give teams visibility into current and historical Kubernetes and cloud spend and resource allocation. These models provide cost transparency in Kubernetes environments that support multiple applications, teams, departments, etc. It also provides visibility into the cloud costs across multiple providers. OpenCost was originally developed and open sourced by Kubecost. This project combines a specification as well as a Golang implementation of these detailed requirements. The web UI is available in the…
read the full opencost overview →
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Frequently asked questions
Is Uptime Kuma or opencost more popular?
Uptime Kuma has 93,190 GitHub stars and opencost has 6,802. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and opencost free?
Both are open source. Uptime Kuma is licensed under MIT and opencost under Apache-2.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and opencost?
Uptime Kuma is written in JavaScript and opencost in Go. 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 opencost?
Choose Uptime Kuma if you want the larger community (93,190 stars) or its MIT licence terms. Choose opencost if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.