Brandwave

GrowthBook vs PostHog:Which is more popular?

In September 2026, PostHog had more branded searches than GrowthBook among feature flag tools worldwide. PostHog had about 246,000 branded searches, while GrowthBook had 14,900. PostHog made up 42.4% of all feature flag tool searches we track, and GrowthBook accounted for 2.6%. When we asked ChatGPT and Google AI Overviews about feature flag tools, GrowthBook appeared in four of the five answers and PostHog in two. GrowthBook was mentioned before PostHog in four out of five answers.

Among feature flag tools worldwide in September 2026

Who do people search for more?

PostHog, about 16 searches for every 1 for GrowthBook

PostHog 246K searchesGrowthBook 14.9K searches

Who does AI mention more?

GrowthBook, mentioned in 4 of 5 answers, PostHog in 2

GrowthBook in 4 of 5PostHog in 2 of 5

Who does AI recommend more?

GrowthBook, named ahead of PostHog in 4 of 5 answers

GrowthBook first in 4PostHog first in 1

Follow GrowthBook vs PostHog and get free monthly updates on what changed

By continuing you'll get index updates and occasional product news from Brandwave. Unsubscribe any time. Privacy

Track your brand against a rival →

Top feature flag tools in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, GrowthBook was mentioned in four out of five: in all three ChatGPT answers and in one of the 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. GrowthBook was listed before PostHog in four out of five answers.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. LaunchDarkly1st
  2. Unleash2nd
  3. Flagsmith3rd
  4. Statsig4th
  5. GrowthBook5th
  6. PostHog6th
  7. Split6th
  8. ConfigCat8th
  9. 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

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 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 nine feature flag tools we track, month by month, from English-language searches worldwide.

GrowthBook and PostHog among feature flag tools worldwide, by month

Share of searches by month for PostHog, GrowthBook. The figures are in the table below the chart.

View monthly share of searches table
MonthOptimizelyPostHogLaunchDarklyStatsigGrowthBookFlagsmithConfigCatSplitUnleash
Oct 202553.4%23.9%11%5.9%2.6%0.97%0.79%0.82%0.5%
Nov 202556.6%25.3%7.9%4.2%2.8%1%0.84%0.75%0.51%
Dec 202556.8%25.4%7.9%4.2%2.8%1%0.68%0.64%0.5%
Jan 202657.7%25.9%8%3.5%2.3%0.86%0.7%0.65%0.42%
Feb 202658.2%21.4%10.1%4.3%2.9%1.1%0.86%0.66%0.52%
Mar 202649%32.8%8.5%3.7%3%1.1%0.73%0.72%0.55%
Apr 202654.3%24.3%9.4%5%4%0.99%0.8%0.64%0.48%
May 202652.6%28.9%7.8%4.8%3.2%0.96%0.63%0.6%0.47%
Jun 202645.6%37.3%8.3%3.4%2.8%1%0.68%0.51%0.41%
Jul 202645.7%37.3%8.4%3.4%2.8%0.85%0.68%0.44%0.41%
Aug 202647.1%38.5%6.8%2.9%2.3%0.86%0.7%0.47%0.41%
Sep 202642.4%42.4%7.3%3.2%2.6%0.78%0.62%0.5%0.32%

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 feature flag tools worldwide held steady at 2.6%, and its estimated monthly branded searches moved from 12.2K to 14.9K.
  • 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

  1. In September 2026, PostHog gained share of searches among feature flag tools worldwide, from 38.5% to 42.4%.

  2. Estimated monthly branded searches for GrowthBook worldwide rose 22.3% over 12 measured months, from 12.2K to 14.9K in September 2026.

How are branded searches counted?

4 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

3 branded search terms

  • growth book
  • growthbook
  • growthbook feature flags

PostHog

1 branded search term

  • posthog

How the Brand Demand Index is measured

Other head-to-heads among feature flag tools

Creator with pink hair and a pink jacket

Put your own brand in this comparison

Brandwave tracks your branded demand next to the rival you actually watch, with your campaigns, spend and outcomes on the same timeline.

Start free