head to head · open source
Uptime Kuma vs Foundatio
Uptime Kuma has 93,190 GitHub stars, 8,655 forks, 805 open issues and last shipped yesterday. Foundatio has 2,104 stars, 251 forks, 15 open issues and last shipped 5 days ago. Uptime Kuma leads on adoption by 4,329% (93,190 vs 2,104 stars). Uptime Kuma is written in JavaScript under MIT; Foundatio is written in C# under Apache-2.0. Uptime Kuma has attracted 9% as many forks as stars, Foundatio 12%. Uptime Kuma 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
| Uptime Kuma | Foundatio | |
|---|---|---|
| GitHub stars | ★ 93K | ★ 2.1K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | C# |
| Last push | 2026-11-02 | 2026-10-29 |
| Forks | ⑂ 8.7K | ⑂ 251 |
| 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 Foundatio if
- You want the Foundatio feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches C#
- You evaluated both and Foundatio 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 Foundatio
Pluggable foundation blocks for building loosely coupled distributed apps. ✨ Why Choose Foundatio? 🔌 Pluggable implementations Swap Redis, Azure, AWS, or in memory with no code changes 🧪 Developer friendly In memory implementations for fast local development and testing 💉 DI native Built for Microsoft.Extensions.DependencyInjection 🎯 Interface first Code against abstractions, not implementations ⚡ Production ready Battle tested in high scale applications 🔄 Consistent APIs Same patterns across caching, queues, storage, and more 🧱 Core Building Blocks 🚀 Quick Start 📦 Provider Implementations 📚 Learn More…
read the full Foundatio overview →
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Frequently asked questions
Is Uptime Kuma or Foundatio more popular?
Uptime Kuma has 93,190 GitHub stars and Foundatio has 2,104. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and Foundatio free?
Both are open source. Uptime Kuma is licensed under MIT and Foundatio under Apache-2.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and Foundatio?
Uptime Kuma is written in JavaScript and Foundatio in C#. 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 Foundatio?
Choose Uptime Kuma if you want the larger community (93,190 stars) or its MIT licence terms. Choose Foundatio if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.