Optimizely vs PostHog:Which is more popular?
In September 2026, Optimizely and PostHog were level in searches among feature flag tools worldwide, with an estimated 246K branded searches each, at 42.4% of the total each. When we asked ChatGPT and Google AI Overviews about feature flag tools, PostHog appeared in two of the five answers and Optimizely in none.
Who do people search for more?
Optimizely and PostHog are searched for about as often as each other.
Who does AI mention more?
PostHog, mentioned in 2 of 5 answers, Optimizely in 0
Who does AI recommend more?
PostHog, the only one of the two named
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Top feature flag tools in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, PostHog was mentioned in two out of five: in one of the three ChatGPT answers and in one of the two Google AI Overviews. Optimizely did not appear in any of the five answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
LaunchDarkly1st
Unleash2nd
Flagsmith3rd
Statsig4th
GrowthBook5th- PostHog6th
Split6th
ConfigCat8th
Optimizely–
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- LaunchDarkly5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Flagsmith5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Unleash5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- GrowthBook4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Statsig3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- PostHog2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- ConfigCat1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Split1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Optimizely0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about feature flag tools
5 answers
Asked ChatGPT
“Which feature flag tool should I use?”
Asked ChatGPT
“What are the best feature flag tools?”
Asked ChatGPT
“What's the best feature flag tool for software rollouts?”
Searched Google, AI Overview
“feature flag tools”
Searched Google, AI Overview
“feature toggle software”
Not named in any answer:
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 nine feature flag tools 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 | Statsig | GrowthBook | Flagsmith | ConfigCat | Split | Unleash |
|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 53.4% | 23.9% | 11% | 5.9% | 2.6% | 0.97% | 0.79% | 0.82% | 0.5% |
| Nov 2025 | 56.6% | 25.3% | 7.9% | 4.2% | 2.8% | 1% | 0.84% | 0.75% | 0.51% |
| Dec 2025 | 56.8% | 25.4% | 7.9% | 4.2% | 2.8% | 1% | 0.68% | 0.64% | 0.5% |
| Jan 2026 | 57.7% | 25.9% | 8% | 3.5% | 2.3% | 0.86% | 0.7% | 0.65% | 0.42% |
| Feb 2026 | 58.2% | 21.4% | 10.1% | 4.3% | 2.9% | 1.1% | 0.86% | 0.66% | 0.52% |
| Mar 2026 | 49% | 32.8% | 8.5% | 3.7% | 3% | 1.1% | 0.73% | 0.72% | 0.55% |
| Apr 2026 | 54.3% | 24.3% | 9.4% | 5% | 4% | 0.99% | 0.8% | 0.64% | 0.48% |
| May 2026 | 52.6% | 28.9% | 7.8% | 4.8% | 3.2% | 0.96% | 0.63% | 0.6% | 0.47% |
| Jun 2026 | 45.6% | 37.3% | 8.3% | 3.4% | 2.8% | 1% | 0.68% | 0.51% | 0.41% |
| Jul 2026 | 45.7% | 37.3% | 8.4% | 3.4% | 2.8% | 0.85% | 0.68% | 0.44% | 0.41% |
| Aug 2026 | 47.1% | 38.5% | 6.8% | 2.9% | 2.3% | 0.86% | 0.7% | 0.47% | 0.41% |
| Sep 2026 | 42.4% | 42.4% | 7.3% | 3.2% | 2.6% | 0.78% | 0.62% | 0.5% | 0.32% |
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 feature flag tools worldwide moved from 53.4% to 42.4%, and its estimated monthly branded searches held steady at 246K.
- Across the 12 months ending September 2026, PostHog’s share of searches among feature flag tools worldwide moved from 23.9% to 42.4%, and its estimated monthly branded searches moved from 110K to 246K.
How did search popularity change for feature flag tools worldwide in September 2026?
2 changes
In September 2026, PostHog gained share of searches among feature flag tools worldwide, from 38.5% to 42.4%.
In September 2026, Optimizely lost share of searches among feature flag tools worldwide, from 47.1% to 42.4%.
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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