Calibre RUM collects Core Web Vitals and other user-experience signals from real browser sessions to help teams locate slow pages and UX issues. It ranks pages by traffic and supports grouping by URL sections such as blog, category and product pages. The service can associate slow LCP rendering, INP interaction delays and CLS layout shifts with page elements. Reports can be filtered by page, device, browser, country, deployment or URL group. Calibre lists web and API access, plus integrations including GitHub, Slack, Zapier, Netlify, Render, webhooks, a Node.js API and a command-line interface. Its RUM script uses no cookies, collects no personal data and is described as having minimal performance overhead. Calibre says data is encrypted in transit with TLS and at rest with AES-256; RUM data passes through AWS edge locations before transfer to a central database in the United States. Plans are priced by sessions: Starter is 75.00 USD per month, Team is 150.00 USD per month, and Company is 1500.00 USD per month paid yearly. There is no free plan, but a 15-day trial is available.
Who it is for
Calibre describes its platform as serving SEOs, agencies, product teams and developers. It may suit teams that need to examine real-session web vitals by page, device, browser, country or deployment.
What is good
- 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
Verdict
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.
Get started with Calibre RUM
- Open the Calibre website
- Start the 15-day trial
- Choose a paid plan from Starter, Team, or Company
- Add the RUM script to monitored sites
- Connect optional integrations or API access
- Invite team seats included with your plan
Limits to know first
Starter includes 5,000 real user sessions, 5,000 synthetic tests per month, and three seats. Team includes 10,000 sessions and 15,000 synthetic tests monthly; Company includes 1,000,000 sessions and 50,000 synthetic tests monthly. When synthetic capacity runs out, monitoring stops until the next billing cycle unless capacity is increased.
Questions about Calibre RUM
How much does Calibre RUM cost?
Starter is $75 per month, Team is $150 per month, and Company is $1,500 per month paid yearly.
Is there a free plan or trial?
There is no free plan. A 15-day trial is available.
Which platforms does Calibre RUM support?
It is available through web and API platforms.
Does it monitor mobile apps?
Mobile app monitoring is not supported.
Which integrations are available?
Listed options include GitHub, Slack, Zapier, Netlify, Render, webhooks, a Node.js API, and a command-line interface.
How long is data retained?
Data retention is listed as 90 or more days.
Calibre RUM plans and pricing
All plansCompared on synthetic monitoring
- Free plan
- No
- Paid from
- $75/mo
- Core Web Vitals
- Yes
- Mobile app monitoring
- No
- Interaction tracking
- Yes
- Geographic breakdown
- Yes
- Data retention
- 90+ days
- Pricing metric
- sessions
