A/B testing globally: market share ranking

Experiments and feature flags.

#	Technology	Global	United Kingdom	Netherlands	Italy	Spain	Japan	Latin America
1	VWO	1.6%	1.4%	2.1%	0.4%	1%	0.3%	1%
2	Optimizely	0.6%	0.5%	0.3%	0.2%	0.3%	0.1%	<0.1%
3	AB Tasty	0.3%	0.5%	0.1%	0.2%	0.5%	0.1%	0.1%
4	Google Optimize (retired)	0.3%	0.3%	0.3%	0.1%	0.3%	0.3%	0.3%
5	Convert	0.3%	0.8%	1.2%	0.2%	0.1%	<0.1%	0.2%
6	Kameleoon	0.3%	0.1%	0.3%	0.2%	0.2%	<0.1%	<0.1%
7	Adobe Target	0.3%	<0.1%	<0.1%	0.1%	0.1%	<0.1%	<0.1%
8	GrowthBook	<0.1%	<0.1%	<0.1%	<0.1%	<0.1%	0%	<0.1%
9	LaunchDarkly	<0.1%	<0.1%	<0.1%	0%	<0.1%	0%	<0.1%
10	Statsig	<0.1%	0%	0%	0%	0%	0%	0%

By site popularity

Share of measured sites in each Tranco popularity band that use the technology: the top 1,000, 10,000 and 100,000 sites and the whole top million.

#	Technology	Top 1K	Top 10K	Top 100K
1	VWO	1.9%	1.8%	1.6%
2	Optimizely	1.9%	1.1%	0.6%
3	Adobe Target	1.5%	0.8%	0.3%
4	AB Tasty	0%	0.5%	0.3%
5	Convert	0.7%	0.4%	0.3%
6	Kameleoon	0.5%	0.4%	0.3%
7	Google Optimize (retired)	0.2%	0.3%	0.3%
8	GrowthBook	0%	<0.1%	<0.1%
9	LaunchDarkly	0.2%	<0.1%	<0.1%
	Sites measured	582	6,676	68,774

Our crawler: 68,774 sites · Global · updated 13 Nov 2026 · Methodology