Alternatives · Technical SEO
Calibre alternatives
As of Oct 23, 2026, the highest-graded Calibre alternative is GTmetrix (2.8 GPA). It's also the best free one.
Calibre compared with 6 alternatives: DebugBear, SpeedCurve, GTmetrix, WebPageTest, Treo and 1 more.
Calibre is a paid product with a free trial, starting at $75 per month, billed monthly or $900 a year. 3 of the 6 alternatives are free or have a free plan. 3 more offer a free trial.
Listings checked up to Oct 23, 2026 · Where the facts come from
At a glance
| Tool | Price | Free plan | Runs on |
|---|---|---|---|
| CalibreThis tool | Free trial · from $75/mo | Trial only | Web |
| DebugBear | Free trial · from $99/mo | Trial only | Web |
| SpeedCurve | Free trial · from $90/mo | Trial only | Web |
| GTmetrix | Free plan · from $4.99/mo | Yes | Web |
| WebPageTest | Free plan · from $180/yr | Yes | Web |
| Treo | Free plan · from $75/mo | Yes | Web |
| PageVitals | Free trial · from $12/mo | Trial only | Web |
Price against what you get
Calibre starts at $75 a month and scores 2.3 out of 4 on features, ease of use and platforms. 1 of the 6 alternatives on this chart scores higher and starts lower: GTmetrix.
WebPageTest and PageVitals start lower without scoring higher.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
How each one differs from Calibre
DebugBear
Page speed and Core Web Vitals monitoring with lab tests and RUM
- DebugBear starts at $99 per month, billed yearly ($1,188 a year).
- DebugBear also covers dashboards.
Suits: SEO and development teams working to pass Core Web Vitals
SpeedCurve
Web performance monitoring with RUM, synthetic tests and budgets
- SpeedCurve starts at $90 per month, billed annually, for 500K page views and 3K checks.
- SpeedCurve also covers dashboards.
Suits: Teams that want field and lab speed data in one place
GTmetrix
Page speed testing with Lighthouse reports, monitoring and an API
- GTmetrix starts at $4.99 per month, billed yearly ($5.99 billed monthly).
- GTmetrix has a free plan, which Calibre lacks.
Suits: Checking why a single page loads slowly
WebPageTest
Page speed tests from real browsers in locations around the world
- WebPageTest starts at $180 per year for 1,000 test runs a month ($18.75 billed monthly).
- WebPageTest has a free plan, which Calibre lacks.
- WebPageTest also covers dashboards.
Suits: Developers digging into exactly how a page loads
Treo
Core Web Vitals dashboard built on CrUX data and Lighthouse runs
- Treo starts at $75 per month, billed annually ($99 billed monthly).
- Treo has a free plan, which Calibre lacks.
Suits: SEO and performance teams watching Core Web Vitals across many sites
PageVitals
Page speed monitoring with Lighthouse tests, RUM and CrUX data
- PageVitals starts at $12 per month, billed annually ($15 billed monthly).
- PageVitals also covers reports.
Suits: Small sites that want lab tests, RUM and CrUX data in one low-cost plan
Limits worth knowing in 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.
Common questions
What are the alternatives to Calibre?
The alternatives to Calibre in this directory are DebugBear, SpeedCurve, GTmetrix, WebPageTest, Treo and PageVitals. Each one has a side-by-side comparison with Calibre.
Is there a free alternative to Calibre?
Yes. GTmetrix, WebPageTest and Treo have a free plan alongside paid ones.
When were these prices checked?
Every listing on this page was checked on Oct 23, 2026, against the pages it cites. Vendors change prices without notice, so confirm on their site before you buy.