Calibre vs Treo (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 Treo if

• Fits if you watch Core Web Vitals across many sites and don't want a script on each one
• Works for comparing your real-user speed with competitors' domains

Look elsewhere if

• Skip it if your pages get too little traffic to be in CrUX, as they'll show no field data
• Tight if you're staying free, since the free plan has no Lighthouse monitoring
• Pricey if you need the API, which starts at Pro, $185 a month billed yearly or $249 monthly
• Watch out: hourly Lighthouse checks use 5 times a page's share of your plan's allowance
• Pricey if you pay monthly, as Vital is $99 against $75 billed yearly

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.

Treo

• Real-user data comes from the Chrome UX Report, so pages without enough traffic to be in that dataset show no field data.
• The free plan has no Lighthouse monitoring; it starts with Vital at $75 a month billed annually.
• API access starts at the Pro plan, $185 a month billed annually or $249 billed monthly.
• Hourly Lighthouse checks use 5 times a page's share of the plan's Lighthouse allowance.

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.

Treo

Site Speed Report

Domain-level Core Web Vitals from the Chrome UX Report with 5 years of history, broken down by device, connection type and 200+ countries.

Competitor benchmarks

Because the data comes from CrUX rather than a script on your site, any domain can be added and compared with your own.

Sitemap Scan

Scans a sitemap and shows CrUX data for every page that has enough traffic to be in the dataset, updated daily, to find the slowest pages.

Lighthouse monitoring

Scheduled Lighthouse runs on mobile or desktop from 9 locations, daily (3 runs, median kept) or hourly, which uses 5 times the page allowance.

Budgets and alerts

Set performance budgets and get notified when a metric changes or drops below the expected level.

Testing behind a login

A static IP to allowlist and custom HTTP headers let the agent test internal or authenticated pages before release.

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.

Treo

• Free$0

  Personal account, 5 sites with 2 years of history and 50 CrUX pages. No Lighthouse monitoring.

• Vital$75

  per month, billed annually ($99 billed monthly)

  1,000 CrUX pages, 40 Lighthouse pages, 5 team members and 50 sites with 5 years of history. No API access.

• Pro$185

  per month, billed annually ($249 billed monthly)

  5,000 CrUX pages, 200 Lighthouse pages, 15 team members, 500 sites, priority support and API access.

• Scale$375

  per month, billed annually ($499 billed monthly)

  20,000 CrUX pages, 500 Lighthouse pages, 50 team members, 500 sites, API access and an onboarding call.

• EnterpriseCustom

  1,000+ Lighthouse pages, 50,000+ CrUX URLs, unlimited team members, SSO, pay by PO and a web performance audit.

Calibre

No public discounts listed.

Treo

• Annual discount

  25% off with annual billing

  Treo's pricing page offers a 25% discount, or three months free, on every annual purchase: Vital is $75 a month billed yearly instead of $99.