Side by side
Calibre RUM vs OpenObserve
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
Free plan Web
OpenObserve brings pipeline processing, parsing, live viewing and archive export together for log work. Review the plan-specific retention terms, since Free specifies 15 days while the product also lists 30-day log and data retention.
Visit OpenObserveThe facts
| Calibre RUM | OpenObserve | |
|---|---|---|
| Free plan | A free trial | Yes |
| Open source | Not published | Not published |
| Runs on | API, Web | Web |
| Lowest paid plan | Starter: $75 a month | Free or on request |
| Plans published | 3 | 2 |
| Maker | Not published | Not published |
| Website | calibreapp.com | openobserve.ai |
| On synthetic monitoring | #28 of 46 | #18 of 46 |
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
OpenObserve: what it does well
- Free plan lists 200 GB/day ingestion
- Supports structured log parsing
- Includes live log tailing and archive export
- Enterprise offers custom capacity and retention
What to know first
- Free plan specifies 15 days of retention
- Enterprise pricing is on request
- Enterprise capacity and retention are custom
Alternatives to Calibre RUM Alternatives to OpenObserve The whole list