DebugBear and Vitals Clock: depth versus a daily watch
No card, no trial expiry.
DebugBear is a specialist web performance platform. Its site lists Core Web Vitals monitoring, scheduled synthetic tests, real user monitoring, uptime monitoring and Lighthouse score tracking, along with detailed tools for diagnosing slow pages. Vitals Clock does a smaller job: daily checks against public Google data, kept over time, with alerts when something gets worse.
Where DebugBear goes further
- Its own synthetic testing, with control over test location, device and network, and detailed request waterfalls.
- Real user monitoring from a script on your site, which covers pages without enough traffic for the Chrome UX Report and lets you slice data your own way.
- Debugging depth, such as tools focused on INP and request-level analysis.
If your team does performance work every week and wants to see why a page is slow down to the request, those features matter.
Where Vitals Clock fits
- You want to know when a page gets slower, with a before and after, and you are happy using PageSpeed Insights and the Chrome UX Report as the data source.
- You do not want to add a monitoring script to your site.
- You want a free plan and low entry pricing.
Side by side
| Vitals Clock | DebugBear | |
|---|---|---|
| Lab testing | PageSpeed Insights API, median of 3 | Own synthetic test infrastructure |
| Field data | Chrome UX Report | Chrome UX Report and its own RUM |
| Script on your site | Not needed | Needed for RUM only |
| Regression alerts | Yes | Yes |
| Free plan | 3 URLs | Check their site |
| Starting price | $19 a month | Check their pricing page |
DebugBear's pricing page needs JavaScript and on 16 Oct 2026 it did not give us figures we could read reliably. No DebugBear prices are quoted here for that reason.
FAQ
Can I start with Vitals Clock and move to DebugBear later?
Yes. Many teams begin with daily alerts and add a deeper tool once performance becomes a regular project.