Uptime Monitoring Compared: UptimeRobot vs Better Stack vs Miterl
Choosing the Right Uptime Monitoring Tool for Your Agency
When your agency manages dozens of client websites, picking the right monitoring tool matters. The wrong choice means missed alerts, frustrated clients, and wasted budget. This article compares three widely-used tools in 2026: UptimeRobot, Better Stack, and Miterl.
Feature and Pricing Comparison
| Feature | UptimeRobot | Better Stack | Miterl |
|---|---|---|---|
| Free plan | 50 monitors / 5-min interval | Limited | Available |
| Shortest check interval | 60s (paid) | 30s | 60s |
| SSL certificate monitoring | Yes | Yes | Yes |
| Slack alerts | Yes | Yes | Yes |
| Chatwork alerts | No | No | Yes |
| LINE alerts | No | No | Yes |
| Japanese UI | No | No | Yes |
| Status pages | Yes (paid) | Yes | Yes |
UptimeRobot: The Long-Standing Default
UptimeRobot has been around for years and offers a generous free tier with up to 50 monitors. It is a solid starting point for small teams. However, it lacks support for popular messaging platforms in the Japanese market such as Chatwork and LINE, and the interface is English-only. For agencies serving clients who rely on these tools, this can be a dealbreaker.
Better Stack: Feature-Rich All-in-One Platform
Better Stack bundles incident management, log aggregation, and status pages into a single platform. It is powerful, but that power comes at a higher price point. For smaller agencies that primarily need uptime checks and alerts, the additional features may be overkill and the cost hard to justify.
Miterl: Built for Multi-Client Agency Workflows
Miterl is designed with agencies in mind. It supports Slack, Chatwork, and LINE notifications out of the box, and provides a Japanese-language interface alongside English. The multi-site management workflow is tailored for teams juggling many client domains.
# List all monitored sites in Miterl
curl -s https://api.miterl.com/v1/monitors \
-H "Authorization: Bearer YOUR_API_KEY" | jq '.data[] | {name, url, status}'
How to Decide: Three Key Criteria
If you are stuck choosing between tools, focus on these factors:
- Alert channel support -- Does the tool integrate with the chat apps your team and clients actually use? Slack alone is not always enough.
- Multi-site management -- Can you efficiently manage 20, 50, or 100 monitors without the UI becoming a bottleneck?
- Cost at scale -- Compare pricing based on the number of monitors you realistically need, not just the free tier limits.
For a detailed side-by-side breakdown, visit the comparison page. You can also test the monitoring experience firsthand in the Playground.
Looking for real-world examples of how agencies use monitoring? Check the use cases page. And if you have questions before getting started, the FAQ covers the most common ones.
The best monitoring tool is the one your team will actually use every day. Choose based on your workflow, not just feature lists.