Side by side
Calibre RUM vs SpeedCurve
Both stand on synthetic monitoring. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free trial APIWeb
Calibre RUM offers page-level real-user performance signals and several report filters, with plans priced by sessions. Check session and synthetic-test allocations when choosing a plan.
Visit Calibre RUM Paid APIWeb
SpeedCurve provides controlled lab tests, field performance data, budgets, alerts, and developer integrations. Pricing starts at $90/month, with additional retention and support in Growth and custom Enterprise terms.
Visit SpeedCurveThe facts
| Calibre RUM | SpeedCurve | |
|---|---|---|
| Free plan | A free trial | No |
| Open source | Not published | Not published |
| Runs on | API, Web | API, Web |
| Lowest paid plan | Starter: $75 a month | Starter: $90 a month |
| Plans published | 3 | 3 |
| Maker | Not published | Not published |
| Website | calibreapp.com | speedcurve.com |
| On synthetic monitoring | #24 of 43 | #34 of 43 |
Calibre RUM: what it does well
- Ranks pages by traffic volume
- Connects performance signals to page elements
- Filters reports by device, browser and country
- RUM script uses no cookies or personal data
- Offers web and API access
What to know first
- No free plan
- Starter includes 5K real user sessions
- Synthetic monitoring stops when monthly test allocation is exhausted
SpeedCurve: what it does well
- Combines synthetic monitoring with real user monitoring
- Tracks Core Web Vitals and custom metrics
- Email or webhook budget alerts
- REST API supports test-result workflows
- GitHub pull-request performance reports
What to know first
- No free plan
- Starter begins at $90/month
- GitHub allows one linked SpeedCurve team
Alternatives to Calibre RUM Alternatives to SpeedCurve The whole list