Calibre RUM

6.5easy start · #23 of 41
in Synthetic Monitoring

Free to practise onnot on record
Free trialyes
Well documentedyes
Runs where you worknot on record

Runs on api, Web. Paid plans from $75/mo.

Calibre RUM is ranked #23 of 41 in synthetic monitoring on The Geeks Club. It runs on API, Web. There is no free plan. A free trial is offered. Paid plans start at $75/mo.

Calibre RUM plans and pricing

All plans

Starter $75/mo $75 / month 5K real user sessions · 5,000 synthetic tests/month · 3 seats · unlimited sites and URLs · 1 team calibreapp.com · 4 Oct 2026

Team $150/mo $150 / month 10K real user sessions · 15,000 synthetic tests/month · 10 seats · unlimited sites and teams calibreapp.com · 4 Oct 2026

Company $1,500/mo $1,500 / month (paid yearly) 1,000,000 real user sessions · 50,000 synthetic tests/month · 50 seats · unlimited sites and teams · invoice payment available calibreapp.com · 4 Oct 2026

Compared 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

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The record

Product: Calibre RUM collects Core Web Vitals and other user experience signals from real browser sessions to help teams find slow pages and UX issues.
Privacy: The RUM script uses no cookies, collects no personal data, and is described as having minimal performance overhead.
Page analysis: RUM ranks pages by traffic volume and lets users group pages by URL sections such as blog, category, and product pages.
Element attribution: RUM identifies elements associated with slow LCP rendering, INP interaction delays, and CLS layout shifts.
Segmentation: Reports can be filtered by page, device, browser, country, deployment, or URL group.
Integrations: Calibre lists integrations including GitHub, Slack, Zapier, Netlify, Render, webhooks, a Node.js API, and a command-line interface.
Security: Calibre says data in transit uses TLS and data at rest is encrypted with AES-256, with encryption keys managed through AWS KMS and automatically rotated.
Compliance: Calibre states that it complies with EU GDPR, UK GDPR, and the Australian Privacy Principles, and acts as a service provider under CCPA for customer data processing.
Data location: Calibre says RUM data is processed at AWS edge locations and then transferred to its centralised database in the United States.
Support: The pricing page says every plan includes email support and describes high-priority support as included with the Company plan.
Usage limits: When a plan's monthly synthetic test allocation is exhausted, Calibre says monitoring stops until the next billing cycle unless capacity is increased.
Audience: Calibre describes its platform as serving SEOs, agencies, product teams, and developers.
Company: Calibre says it has been bootstrapped and profitable since its founding in 2017.
Founded: 2017
Price from: $75/mo

Where it ranks on The Geeks Club

Best Synthetic Monitoring in 2026#23 of 41
Best Real User Monitoring in 2026#16 of 27

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Sources

calibreapp.com/product/rum· checked 4 Oct 2026
calibreapp.com· checked 4 Oct 2026
calibreapp.com/security· checked 4 Oct 2026
calibreapp.com/pricing· checked 4 Oct 2026
calibreapp.com/about· checked 4 Oct 2026