GrowthBook vs PostHog:Which is more popular?
In September 2026, PostHog had more branded searches than GrowthBook among A/B testing tools in New Zealand. PostHog had about 720 branded searches, while GrowthBook had 70. PostHog made up 48% of all A/B testing tool searches we track, and GrowthBook accounted for 4.7%. When we asked ChatGPT and Google AI Overviews about A/B testing tools, GrowthBook appeared in all five answers and PostHog in four. GrowthBook was mentioned before PostHog in three out of five answers.
Who do people search for more?
PostHog, about 10 searches for every 1 for GrowthBook
Who does AI mention more?
GrowthBook, mentioned in every answer we collected
Who does AI recommend more?
GrowthBook, named ahead of PostHog in 3 of 5 answers
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Top A/B testing tools in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, GrowthBook appeared in all five answers. PostHog was mentioned in four out of five: in two of the three ChatGPT answers and in both Google AI Overviews. GrowthBook was listed before PostHog in three out of five answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
VWO1st- PostHog2nd
Optimizely3rd- GrowthBook4th
Convert Experiences5th
AB Tasty6th
Statsig7th
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Optimizely5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- GrowthBook5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- VWO5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- PostHog4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- AB Tasty4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Convert Experiences3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Statsig2 of 5Named in 0 of 3 ChatGPT answersNamed in 2 of 2 Google answers
See every answer about A/B testing tools
5 answers
Asked ChatGPT
“Which A/B testing tool should I use in New Zealand?”
Asked ChatGPT
“What are the best A/B testing tools in New Zealand?”
Asked ChatGPT
“What's the best A/B testing tool in New Zealand for website conversion testing?”
Searched Google, AI Overview
“a/b testing tools”
Searched Google, AI Overview
“best ab testing tool”
Brands are shown in the order each answer named them. The survey took place in New Zealand on October 20, 2026.
Is GrowthBook or PostHog more popular in search?
This chart shows how often people search Google for GrowthBook and PostHog by name. Each line represents a brand's share of searches for all seven A/B testing tools we track, month by month, from searches in New Zealand.
Share of searches by month for PostHog, GrowthBook. The figures are in the table below the chart.
View monthly share of searches table
| Month | PostHog | Optimizely | GrowthBook | Statsig | AB Tasty | Convert Experiences | VWO |
|---|---|---|---|---|---|---|---|
| Oct 2025 | 36.9% | 46.9% | 3.8% | 8.5% | 1.5% | 1.5% | 0.77% |
| Nov 2025 | 37.9% | 47.6% | 4.9% | 5.8% | 0.97% | 1.9% | 0.97% |
| Dec 2025 | 41.5% | 42.6% | 5.3% | 7.4% | 1.1% | 1.1% | 1.1% |
| Jan 2026 | 41.4% | 41.4% | 7.8% | 5.2% | 2.6% | 0.86% | 0.86% |
| Feb 2026 | 36.1% | 44.4% | 6.5% | 7.4% | 1.9% | 1.9% | 1.9% |
| Mar 2026 | 41.3% | 42.7% | 4.9% | 8.4% | 1.4% | 0.7% | 0.7% |
| Apr 2026 | 34.2% | 43% | 7.9% | 7.9% | 3.5% | 1.8% | 1.8% |
| May 2026 | 36.6% | 46.6% | 6.9% | 6.9% | 1.5% | 0.76% | 0.76% |
| Jun 2026 | 52.1% | 36.7% | 5.3% | 4.1% | 0.59% | 0.59% | 0.59% |
| Jul 2026 | 49.7% | 35.2% | 7.6% | 3.4% | 1.4% | 1.4% | 1.4% |
| Aug 2026 | 47.7% | 41.1% | 6% | 2.6% | 1.3% | 0.66% | 0.66% |
| Sep 2026 | 48% | 41.3% | 4.7% | 3.3% | 1.3% | 0.67% | 0.67% |
How has the GrowthBook and PostHog comparison changed over the last 12 months?
3 findings
- PostHog was ahead of GrowthBook in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, GrowthBook’s share of searches among A/B testing tools in New Zealand moved from 3.8% to 4.7%, and its estimated monthly branded searches moved from 50 to 70.
- Across the 12 months ending September 2026, PostHog’s share of searches among A/B testing tools in New Zealand moved from 36.9% to 48%, and its estimated monthly branded searches moved from 480 to 720.
How did search popularity change for New Zealand A/B testing tools in September 2026?
2 changes
In September 2026, GrowthBook lost share of searches among A/B testing tools in New Zealand, from 6% to 4.7%.
Estimated monthly branded searches for PostHog in New Zealand rose 50% over 12 measured months, from 480 to 720 in September 2026.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using GrowthBook’s and PostHog’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
GrowthBook
1 branded search term
- growthbook
PostHog
1 branded search term
- posthog
Other head-to-heads among A/B testing tools
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