Companies Using Google Analytics 4 (GA4)

As of our March 2026 crawl, TechnologyChecker.io tracks 3,688,199 active domains running Google Analytics 4 (GA4), holding 14.95% market share in the web analytics category. I pulled numbers from our 140,109 enriched company dataset for this report. GA4 replaced Universal Analytics in July 2023, and its adoption curve is unlike anything else in our database. Here's what the data reveals about who uses it, how they got there, and what it means for sales teams.

Growth Trajectory

GA4 sat at fewer than 20 active domains from 2005 through 2019. Beta testers trickled in during early 2020. Google's October 2020 public launch started the climb: 2,900 domains by year-end, 357,839 by December 2021, and 1.05 million by December 2022. The real inflection came in H1 2023, when Universal Analytics' July 1 shutdown deadline triggered mass migration, GA4 added 962,551 active domains in seven months. For more context, see our GA4 migration insights. By March 2025, adoption peaked at 3.69 million. Since then, counts declined toward 2.84 million by July 2025, likely from site closures and legacy tag consolidation. The 2,981,588 previously used count shows nearly 3 million domains tried GA4 and stopped.

Sales Signal: The 2.98 million lapsed GA4 domains include sites that implemented GA4 during the forced migration and then either shut down or reverted to simpler tracking. This pool represents companies that understand GA4 but may need help configuring it properly.

"GA4 added 962,551 domains in just seven months during the Universal Analytics shutdown, the fastest forced migration in web analytics history." - Mehmet Suleyman, CEO at TechnologyChecker.io

Customer Profile

GA4's user base skews heavily toward micro-businesses. 73.08% have 1-10 employees, and another 15.72% have 11-50. Combined, 88.8% are under 50 employees. The free tier drives this, GA4 costs nothing for standard use. At the same time, GA4 runs on domains belonging to Deloitte (1900), IBM (1911), Siemens (1847), and Bank of America. These aren't startups. Company age data reinforces the small-business tilt: 38.32% founded in the 2010s and 23.45% in the 2020s, so 61.77% are digital-native companies less than 16 years old. Pre-2000 companies make up 21.89% of the base.

Sales Signal: The 88.8% micro-business concentration means GA4 users are overwhelmingly non-technical and cost-sensitive. Any product selling into this base needs a free or very low-cost entry point with minimal setup friction.

Industry and Geographic Concentration

GA4 is the most horizontal technology in our database. Retail leads at just 6.30% (13,680 companies), followed by Software Development (2.92%) and Advertising Services (2.73%). No single industry exceeds 6.3%. Construction, IT Services, Real Estate, Wellness, Consulting, and Financial Services all cluster between 2.2% and 2.5%. It's not a vertical product. It's a utility.

The United States accounts for 36.88% of GA4 companies, the UK for 9.47%, and Australia for 4.47%. English-speaking markets total over 54%. Europe is well-represented: France (3.49%), Netherlands (2.89%), Italy (2.71%), Spain (2.49%), and Germany (1.86%) add another 14.4%. Brazil (2.61%) and India (2.42%) show GA4's global reach.

Sales Signal: The 14.4% European concentration across five countries makes GDPR compliance tools a natural cross-sell. GA4 users in France, Netherlands, and Italy face strict regulatory requirements and need consent management solutions alongside their analytics.

Migration Patterns

GA4's migration data confirms the forced-migration narrative. The largest inbound flow: 53,179 companies switched from Google Universal Analytics, with 21,494 in the last year. Google Analytics Classic contributed another 43,911. These aren't competitive wins. They're product replacements. The Facebook Pixel migration is more telling: GA4 gained 16,553 companies from Facebook Pixel but lost 28,438, a 1:1.72 loss ratio. That's significant, sites prioritizing ad conversion tracking over full analytics may drop GA4 for simpler pixel-based measurement. The Site Kit numbers (3,625 gained, 9,587 lost) represent WordPress users switching between direct GA4 and Site Kit's managed version.

Sales Signal: The 28,438 companies that left GA4 for Facebook Pixel chose simpler conversion tracking over full analytics. They're potential targets for lightweight analytics tools that don't require the complexity of GA4.

"GA4 loses to Facebook Pixel at a 1:1.72 ratio, that tells you a lot of site owners want conversion tracking, not full-blown analytics." - Mehmet Suleyman, CEO at TechnologyChecker.io

Technology Ecosystem

Google Tag Manager (99.81%) is near-universal among GA4 users, confirming it's the default deployment pipeline. Facebook Pixel (42.57%) and Facebook Custom Audiences (41.82%) reveal over 4 in 10 GA4 sites also run Facebook ad tracking. Cloudflare (51.98%) and Cloudflare CDN (49.40%) dominate infrastructure. PayPal (31.80%), Visa (30.92%), and Shopify (23.66%) point to significant ecommerce overlap. Yoast SEO (27.45%) confirms a strong WordPress-based segment.

Sales Signal: The 23.66% Shopify overlap means nearly a quarter of GA4 sites run ecommerce. Enhanced ecommerce tracking setup services have an addressable market of 33,000+ companies just within our enriched dataset.

G2 Review Signals

G2 reviews (941 total mentions, shared with the Google Analytics product listing) show users praising valuable insights (179 mentions) and ease of use (139 mentions). But the pain points are stark: steep learning curve (91 mentions), learning difficulty (60 mentions), and not intuitive (49 mentions) add up to over 200 complaints about complexity. Our migration data corroborates this: the 9,587 companies that moved from GA4 to Site Kit chose Google's simplified WordPress plugin over the full GA4 interface. Users want GA4's data without GA4's complexity.

Sales Signal: Over 200 G2 mentions of complexity, combined with the Site Kit migration flow, creates a clear market for GA4 reporting simplification tools, dashboards, and managed analytics services.

Key Takeaways

1. 3.69M active domains after the fastest forced migration in analytics history. GA4 went from near-zero to 3.69M in five years, driven by Universal Analytics deprecation.

2. 88.8% of users are under 50 employees, GA4 is a free utility adopted by default, not chosen after careful evaluation.

3. 1:1.72 loss ratio to Facebook Pixel shows many site owners prefer simple conversion tracking over full analytics.

4. 200+ G2 complexity complaints make simplification the top sales angle for GA4-adjacent products.

5. 23.66% Shopify overlap creates a defined ecommerce analytics niche within the GA4 user base.

Sales Applications

Outreach template: "Hi [Name], I noticed [Company] runs GA4 alongside Shopify. Our data shows 23.66% of GA4 users are on Shopify. And most struggle with enhanced ecommerce tracking. We help similar [industry] stores get purchase funnel data working in under a week. Interested?"

Targeting strategy: Filter for Retail (13,680), Software Development (6,333), and Construction (5,341) companies with 11-50 employees in the US, UK, or Australia. These growing businesses have enough traffic to generate useful GA4 data but lack the analytics expertise to extract value from it.

Competitive angle: The 28,438 companies that left GA4 for Facebook Pixel chose simplicity over depth. Lightweight analytics alternatives that offer GA4-level insights without the complexity can win this segment back. Target the 6,961 that switched in the last year for the freshest signal.

Explore the full dataset of 140,109 enriched GA4 companies across 3.69 million domains at TechnologyChecker.io, filter by industry, size, geography, and tech stack to build targeted prospect lists.