Google Analytics 4 review

A free and powerful entry point for teams already using Google's ecosystem.

Verdict

Google Analytics 4 makes the list because its free, native integration with Google Ads and BigQuery offers a powerful, no-cost entry point into CRO, despite its testing features being less advanced than paid competitors.

What customers praise

The direct integration with BigQuery allows for sophisticated, unsampled analysis of experiment data that is impossible with many paid tools without expensive add-ons.

What customers criticise

The A/B testing setup (via remote config) is far less intuitive than the visual editors of other tools, and there is no dedicated customer support for the free version.

Best for

Teams on a zero budget or those deeply embedded in the Google ecosystem who need basic A/B testing capabilities tied directly to their analytics data.

At a glance

• Integrations: Google Ads, BigQuery, Salesforce, Google Tag Manager
• Compliance: GDPR, CCPA
• Regions served: Global
• Typical onboarding: 1 day
• Free tier: yes

Red flags

Public risk signals as of June 2026: none. No material public risk signals as of 2026-06-18. See the full red-flag report.

Alternatives

See alternatives to Google Analytics 4, or compare against the next-ranked entry: Google Analytics 4 vs Mutiny.

Source: Top 11 The 11 Best CRO Tools for Higher Conversions, verified June 18, 2026 — no paid placement.