Comparison
Sentinel vs Uptime Kuma
Great Open Source, But What's Your Time Worth?
Uptime Kuma is a genuinely excellent open-source monitor, and if you love self-hosting it's hard to beat for free. The real question isn't features; it's the cost of the server, the upkeep, and the hours you spend running it, especially once you need monitoring from more than one location. Sentinel is the fully managed alternative for when that adds up.
Feature-by-Feature Comparison
Self-hosted and free versus fully managed, and where each one actually costs you.
| Feature | Sentinel | Uptime Kuma |
|---|---|---|
| Hosting & Maintenance | Fully managed, nothing to run | You host, patch, and back it up |
| Monitoring Locations | 4 global regions with consensus | 1 (wherever you install it) |
| Setup Time | Sign up, add a URL | Provision a server, Docker, TLS, config |
| Reliability | Redundant infrastructure | Single point of failure (one box) |
| Check Types | HTTP, SSL, DNS, domain, keyword, API, ping, port, heartbeat/cron | HTTP, TCP, DNS, ping, keyword, push |
| REST API | Full REST API | Limited / community |
| AI Access (MCP) | Built-in MCP server for Claude, ChatGPT & more | Not available |
| Status Pages | Branded, custom domain | Built-in, basic |
| Client Reports | Automated PDF reports (Business) | Not available |
| Alerting | Email, SMS, Slack, Discord, webhooks | Many community integrations |
| Total Cost | Flat subscription, everything included | Free software + server + your time |
Why Teams Move From Self-Hosted to Sentinel
Three reasons teams outgrow a self-hosted monitor.
Your Time Is the Real Price
Uptime Kuma's software is free, but the system around it is not. You provision a server, wire up Docker, TLS and notifications, then keep it patched, backed up, and online, forever. For a billable professional, those hours are the most expensive thing in the equation. Sentinel has nothing to install or maintain: that work is ours, so your time goes to client work instead of babysitting a monitor.
Global Monitoring Without Global Servers
A self-hosted monitor checks from one location (wherever you installed it), so a network blip between that box and your site can read as a false outage. To monitor from multiple regions with Uptime Kuma you'd have to run and maintain a separate server in each region and stitch the results together. Sentinel checks from four regions with consensus out of the box, no extra infrastructure to run.
Talk to Your Monitoring
Uptime Kuma is something you log into. Sentinel ships a built-in MCP server, so you can connect Claude, ChatGPT, or any AI assistant and simply ask "what needs my attention this morning?" or "any SSL certificates expiring soon?", and get an answer without opening a dashboard. It's a different, faster way to interact with your infrastructure that a self-hosted tool can't offer.
When Uptime Kuma Is the Right Choice
We mean it: Uptime Kuma is excellent, and for plenty of people it's the better pick. Choose it when:
You enjoy self-hosting
If running your own infrastructure is something you like doing and have time for, Uptime Kuma is a polished, capable monitor that costs nothing to license.
Data must stay on your infrastructure
Strict data-residency or air-gapped requirements that rule out any third party are a genuine reason to self-host, and Uptime Kuma handles it well.
It's for personal or internal projects
For side projects and internal services where a single region is fine and a brief blind spot during maintenance is acceptable, the free option is plenty.
…otherwise, consider managed
If monitoring is mission-critical, you need global checks, or you bill for your time, the maintenance and single-point-of-failure tradeoffs are where teams move to a hosted tool like Sentinel.
FAQ
Sentinel vs Uptime Kuma questions
Is Uptime Kuma free?
The Uptime Kuma software is free and open source. Running it is not free in practice: you pay for the server it runs on and, more significantly, the time to set it up, keep it patched and backed up, and keep it online. The honest comparison is your time and infrastructure versus a hosted subscription.
Can Uptime Kuma monitor from multiple regions?
Not on its own. Uptime Kuma checks from the single location where it's installed. To get true multi-region monitoring you'd have to run and maintain a separate Uptime Kuma server in each region and combine the results yourself. Sentinel checks from four global regions with consensus by default.
When is Uptime Kuma the better choice?
If you're monitoring personal or internal projects, you enjoy running your own infrastructure, or you have strict data-residency requirements that rule out a third party, and you have the time to own the upkeep, Uptime Kuma is an excellent, genuinely free option.
Do I have to migrate off Uptime Kuma to try Sentinel?
No. Sentinel's free plan needs no credit card and includes ten monitors, so you can run it alongside your existing Uptime Kuma setup and compare them on your own sites before deciding anything.
Monitoring Without the Maintenance
Get global, multi-region monitoring with SSL, DNS, status pages, a REST API, and AI access, with no server to run. The free plan needs no credit card, so run it next to your self-hosted setup.