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Index › GTM › Marketing › Experimentation › GrowthBook vs PostHog
Experimentation and personalization · November 2026 Edition

GrowthBook vs PostHog

Zero of fourteen models named GrowthBook first on the direct prompt; zero named PostHog. GrowthBook was named by ten of the fourteen models and PostHog by twelve and GrowthBook carries 24 labels and PostHog 21, so the shares are not directly comparable.

GrowthBook

accepted challenger

Named in two categories this edition.

PostHog

accepted challenger

Named in nine categories this edition.

First-choice share8%3%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate0%0%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#3#6A position in a field of 14; printed, not drawn.
Labels2421A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, GrowthBook reading right to left. Rank and label count are printed, not drawn.VWO was named alongside these two in thirteen of the fourteen direct answers. VWO vs GrowthBook · VWO vs PostHog · Convert Experiences vs GrowthBook

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the experimentation and personalization page.

By framing

How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
GrowthBookFirst choices, of fourteen modelsPostHog
Direct00
Paraphrase00
Comparative00
Budget-constrained52
Scale-constrained00
Negative20
Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.

Every model, every framing

The eighty-four answers behind the chart above, one cell each: where GrowthBook and PostHog stood in it.
ModelDirectParaphraseComparativeBudget-constrainedScale-constrainedNegative
Claude Haiku 4.5
GPT-5.4 mini
Gemini 3.5 Flash
Perplexity Sonar
Grok 4.20
Mistral Small
DeepSeek V4 Flash
Llama 4 Maverick
Qwen 3.7 Flash
Kimi K2
GLM 4.7 FlashX
MiniMax M2.5
GPT-6 Luna
Muse Glimmer 30B
GrowthBook PostHog first choice named as an alternative argued againstblank: not namedEach cell is one answer, GrowthBook on the left and PostHog on the right.

The direct prompt

The plain question, one answer per model, grouped by where GrowthBook and PostHog stood in it.

Neither was named

14 of 14 modelsThe answer made no first choice from these two in this category.
Claude Haiku 4.5VWO alternatives: Mutiny, Personyze
GPT-5.4 miniOptimizely CMS alternatives: Adobe Target, Dynamic Yield, VWO
Gemini 3.5 FlashVWO alternatives: AB Tasty, HubSpot Marketing Hub, Kameleoon
Perplexity SonarHubSpot Content Hub alternatives: Abmatic AI, Croct, Mutiny, VWO, Webflow Optimize
Grok 4.20Croct alternatives: AB Tasty, Kameleoon, VWO
Mistral SmallHubSpot Content Hub alternatives: Optimizely CMS, Personyze, VWO
DeepSeek V4 FlashConvert Experiences, VWO alternatives: Mutiny, Personyze
Llama 4 MaverickHubSpot Content Hub
Qwen 3.7 FlashVWO alternatives: Convert Experiences, Mutiny
Kimi K2VWO alternatives: Mutiny, Personyze
GLM 4.7 FlashXPersonyze alternatives: HubSpot Content Hub, Optimizely CMS, Right Message, VWO
MiniMax M2.5Personyze alternatives: Convert Experiences, VWO
GPT-6 LunaVWO alternatives: AB Tasty
Muse Glimmer 30BVWO alternatives: Convert Experiences, Mutiny, Optimizely CMS, Personyze

Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.

By buyer segment

The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
GrowthBook leads by two points.
GrowthBook7%#5 of 16
PostHog5%#7 of 16
The full small business standing →
Mid-marketThe figures above
GrowthBook leads by five points.
GrowthBook8%#3 of 14
PostHog3%#6 of 14
The full mid-market standing →
Enterprise
GrowthBook leads by nine points.
GrowthBook9%#4 of 13
PostHog0%#– of 13
The full enterprise standing →

What the models said about GrowthBook

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.

“Best Overall for Product & Technical Teams (Generous Free Tiers) ... GrowthBook (Best Open-Source Option)” Gemini 3.5 Flash · budget prompt · first choice
“Open-source options (like GrowthBook) - no vendor lock-in, full auditability” Kimi K2 · negative prompt · first choice
“GrowthBook if you want to stay completely in your warehouse and self-host.” Muse Glimmer 30B · budget prompt · first choice

What the models said about PostHog

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. One of one in this category shown.

“Developer-led, zero cost to start: PostHog or GrowthBook. PostHog if you want analytics + experiments in one UI” Muse Glimmer 30B · budget prompt · first choice
Also compared
VWO vs GrowthBookVWO vs PostHogConvert Experiences vs GrowthBookConvert Experiences vs PostHogGrowthBook vs PersonyzeGrowthBook vs Optimizely CMSGrowthBook vs AB TastyGrowthBook vs MutinyPersonyze vs PostHogOptimizely CMS vs PostHogPostHog vs AB TastyPostHog vs MutinyAll twenty-eight head-to-head pages and the full experimentation standing

Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.