Optimizely vs PostHog:Which is more popular?
In September 2026, Optimizely and PostHog were level in searches among A/B testing platforms worldwide, with an estimated 246K branded searches each, at 40.6% of the total each. When we asked ChatGPT and Google AI Overviews about A/B testing platforms, Optimizely and PostHog each appeared in four of the five answers. Optimizely and PostHog were each mentioned first in two of the four answers.
Who do people search for more?
Optimizely and PostHog are searched for about as often as each other.
Who does AI mention more?
Both were mentioned in 4 of 5 answers.
Who does AI recommend more?
Each is named first in 2 of 4 answers.
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Top A/B testing platforms in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Optimizely and PostHog were each mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Optimizely and PostHog were each listed first in two of the four answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
PostHog1st
Optimizely2nd
Statsig3rd
VWO4th
AB Tasty5th
GrowthBook6th
LaunchDarkly7th
Convert Experiences8th
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Optimizely4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- PostHog4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- VWO4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Statsig3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- GrowthBook3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- LaunchDarkly2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- AB Tasty2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Convert Experiences1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about A/B testing platforms
5 answers
Asked ChatGPT
“Which A/B testing platform should I use?”
Asked ChatGPT
“What are the best A/B testing platforms?”
Asked ChatGPT
“What's the best A/B testing platform for A marketing team?”
Searched Google, AI Overview
“a/b testing platform”
Searched Google, AI Overview
“website testing software”
Brands are shown in the order each answer named them. The survey took place in the United States on October 20, 2026.
Is Optimizely or PostHog more popular in search?
This chart shows how often people search Google for Optimizely and PostHog by name. Each line represents a brand's share of searches for all eight A/B testing platforms we track, month by month, from English-language searches worldwide.
Share of searches by month for Optimizely, PostHog. The figures are in the table below the chart.
View monthly share of searches table
| Month | Optimizely | PostHog | LaunchDarkly | VWO | Statsig | GrowthBook | AB Tasty | Convert Experiences |
|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 48.6% | 21.7% | 9.8% | 10.1% | 5.4% | 2.4% | 2% | 0.09% |
| Nov 2025 | 52.4% | 23.4% | 7% | 8.9% | 3.9% | 2.6% | 1.7% | 0.09% |
| Dec 2025 | 52.6% | 23.5% | 7.1% | 8.9% | 3.9% | 2.6% | 1.4% | 0.08% |
| Jan 2026 | 50.8% | 22.8% | 6.8% | 12.7% | 3.1% | 2.1% | 1.7% | 0.08% |
| Feb 2026 | 51.5% | 18.9% | 8.5% | 12.9% | 3.8% | 2.6% | 1.7% | 0.11% |
| Mar 2026 | 44.3% | 29.7% | 7.3% | 11.1% | 3.3% | 2.7% | 1.5% | 0.12% |
| Apr 2026 | 49.6% | 22.2% | 8.2% | 10.2% | 4.5% | 3.7% | 1.6% | 0.09% |
| May 2026 | 48.4% | 26.5% | 6.5% | 9.9% | 4.4% | 2.9% | 1.3% | 0.07% |
| Jun 2026 | 42.4% | 34.7% | 7% | 8.7% | 3.1% | 2.6% | 1.4% | 0.07% |
| Jul 2026 | 43.2% | 35.3% | 7.1% | 7.3% | 3.2% | 2.6% | 1.2% | 0.07% |
| Aug 2026 | 44.9% | 36.7% | 6% | 6.2% | 2.7% | 2.2% | 1.2% | 0.06% |
| Sep 2026 | 40.6% | 40.6% | 6.7% | 5.6% | 3% | 2.5% | 1.1% | 0.06% |
How has the Optimizely and PostHog comparison changed over the last 12 months?
3 findings
- Optimizely was ahead of PostHog in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Optimizely’s share of searches among A/B testing platforms worldwide moved from 48.6% to 40.6%, and its estimated monthly branded searches held steady at 246K.
- Across the 12 months ending September 2026, PostHog’s share of searches among A/B testing platforms worldwide moved from 21.7% to 40.6%, and its estimated monthly branded searches moved from 110K to 246K.
How did search popularity change for A/B testing platforms worldwide in September 2026?
2 changes
In September 2026, PostHog gained share of searches among A/B testing platforms worldwide, from 36.7% to 40.6%.
In September 2026, Optimizely lost share of searches among A/B testing platforms worldwide, from 44.9% to 40.6%.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Optimizely’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.
Optimizely
1 branded search term
- optimizely
PostHog
1 branded search term
- posthog
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