Calibre vs PageVitals (2026): which should you pick?

Pick Calibre if

• Fits if you watch lots of sites, since Starter allows unlimited sites
• Works for developers who want speed checks on each GitHub pull request

Look elsewhere if

• Watch out: monitoring stops when the monthly test allowance runs out, unless you buy packs at $60 per 5,000
• Tight if you get real traffic, as Starter's real user tracking pauses at 5,000 sessions a month
• Pricey if your team grows, at $15 a month for each seat past those included
• Watch out: cancelling deletes all of an account's data immediately and permanently
• Pricey if you pay yearly expecting a discount, as $900 is the same as 12 monthly payments

Pick PageVitals if

• Fits if you run a couple of small sites and want lab, RUM and CrUX data on one plan
• Works for agencies tracking Core Web Vitals for several client websites

Look elsewhere if

• Skip it if you want a free plan, as there's only a 14-day trial and the pricing page says no refunds
• Pricey if you need the API, webhooks, CI/CD or tests behind a login, which start at Growth, $39 a month billed yearly
• Watch out: when the month's tests run out, testing stops until the next cycle, and unused tests don't roll over
• Tight if you test a lot, as 5,000 extra synthetic tests are a $50 a month add-on

Calibre

• There is no free plan, and monitoring stops when the monthly test allowance runs out unless you add test packs at $60 per 5,000.
• Starter's real user tracking pauses at 5,000 sessions a month; Team includes 10,000 and then charges $75 per 100,000.
• Seats beyond those included cost $15 a month each, and paying yearly costs the same as 12 monthly payments.
• Cancelling deletes all of an account's data immediately and permanently.

PageVitals

• There is no free plan, and the pricing page says it gives no refunds; the 14-day trial is offered instead.
• The REST API, webhooks, CI/CD integration and tests behind a login start at Growth, $39 a month billed annually.
• When the monthly test allowance runs out, testing stops until the next billing cycle; unused tests do not roll over.
• Extra tests are add-ons: 5,000 synthetic tests for $50 a month, 100,000 field tests for $10 a month.

Calibre

Real user monitoring

Collects Core Web Vitals from real browser sessions, with adjustable sampling and attribution of the page elements behind slow interactions.

Chrome UX Report monitoring

Tracks Google's CrUX field data for every monitored site and shows which pages pass the Core Web Vitals assessment.

Synthetic page speed tests

Scheduled and on-demand lab tests for each URL and test profile, with synthetic snapshots kept for the life of the account.

Third-party impact

Breaks down how external scripts and other third-party resources affect each page's load and responsiveness.

Developer tooling

A command-line client, Node.js API, webhooks, GitHub pull request checks and CI/CD hooks to test before and after deploys.

Sites ranked by speed

An overview that ranks every monitored site by performance, with alerts sent to Slack and deploy markers from Netlify.

PageVitals

Scheduled Lighthouse tests

Synthetic tests on desktop and mobile from 11 regions, with Lighthouse and network waterfall reports. One page tested daily uses about 60 tests a month.

Real-user monitoring

A script collects LCP, INP, CLS and TTFB from real visits, filterable by device, location and network. Installs through GTM, WordPress, Shopify, Wix or Magento.

CrUX reports

Chrome UX Report data for the whole site and for single pages, with 6 months of weekly history and competitor comparison.

Multi-step tests

Scripted tests that follow a user flow across several steps, from 5 on Starter to 100 on Pro.

Performance budgets and alerts

Budgets on 25+ lab and field metrics, with defaults based on Google's recommendations, and alerts by email, Slack, Teams or webhook.

Developer workflow

A GitHub Action, CLI, JavaScript SDK, REST API and a Zapier connection. The API and CI/CD integration start at the Growth plan.

Calibre

• Starter$75

  per month, billed monthly or $900 a year

  5,000 real user sessions and 5,000 synthetic tests a month, CrUX data, 3 seats, unlimited sites, 1 team and 90 days of RUM data.

• Team$150

  per month, billed monthly or $1,800 a year

  10,000 real user sessions, 15,000 synthetic tests, 10 seats, unlimited teams, SAML single sign-on and 1 year of RUM data.

• Company$1,500

  per month, paid yearly

  1 million real user sessions, 50,000 tests, 50 seats, a security audit log, invoice payment, priority support and 2 years of RUM data.

PageVitals

• Starter$12

  per month, billed annually ($15 billed monthly)

  2 websites, 1,000 synthetic tests and 50,000 RUM pageviews a month, 5 multi-step tests and 6 months of data.

• Growth$39

  per month, billed annually ($49 billed monthly)

  Up to 10 websites, 5,000 synthetic tests and 250,000 RUM pageviews, plus the REST API, webhooks, CI/CD and tests behind a login.

• Pro$79

  per month, billed annually ($99 billed monthly)

  Up to 25 websites, 10,000 synthetic tests, 2 million RUM pageviews, 24 months of data, priority support and SSO.

Calibre

No public discounts listed.

PageVitals

• Annual discount

  About 20% off with annual billing

  PageVitals' pricing page shows Starter at $12 a month billed annually against $15 billed monthly, and Pro at $79 against $99.

• Nonprofit

  Nonprofit and charity discount

  The pricing FAQ says non-profit and charity organizations can get a discount on annual plans by contacting the sales team.