GrowthBook vs PostHog Feature Flags
Zero of fourteen models named GrowthBook first on the direct prompt; zero named PostHog Feature Flags. GrowthBook was named by thirteen of the fourteen models and PostHog Feature Flags by eleven and GrowthBook carries 43 labels and PostHog Feature Flags 27, so the shares are not directly comparable.
Named in one category this edition.
Named in one category this edition.
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 feature flags page.
By framing
GrowthBookFirst choices, of fourteen modelsPostHog Feature Flags
Across every category in the October 2026 Edition, GrowthBook and PostHog Feature Flags were named in the same answer fifty-eight times, of the 118 answers naming GrowthBook and the 80 naming PostHog Feature Flags. In those answers PostHog Feature Flags took the first choice seven times and GrowthBook five.
Every model, every framing
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | |||||
| GPT-5.4 mini | ||||||
| Gemini 3.5 Flash | | | | | | |
| Perplexity Sonar | | | | | ||
| Grok 4.1 Fast | | | | | | |
| 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 Feature Flags first choice named as an alternative argued againstblank: not namedEach cell is one answer, GrowthBook on the left and PostHog Feature Flags on the right.The direct prompt
Neither was the first choice, one was named
6 of 14 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
8 of 14 modelsThe answer made no first choice from these two in this category.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
PostHog Feature Flags9%#3 of 8GrowthBook7%#4 of 8GrowthBook9%#6 of 8PostHog Feature Flags5%#7 of 8GrowthBook0%#6 of 9PostHog Feature Flags0%#– of 9What 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.
“could be Flagsmith or GrowthBook, as they offer self-hosted alternatives with a typical budget of $0–$6000/month” Llama 4 Maverick · budget prompt · first choice
“For a mid-sized B2B company, GrowthBook is the strongest all-around recommendation.” DeepSeek V4 Flash · paraphrase prompt · first choice
“If you want a free, open-source option, GrowthBook is a great choice.” Mistral Small · budget prompt · first choice
What the models said about PostHog Feature Flags
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Five of six in this category shown.
“PostHog experienced four separate incidents in 10 days (Oct 2025), totaling 14+ hours of cumulative impact on flag evaluations” Kimi K2 · negative prompt · soft negative
“the feature flagging capabilities in these platforms are often "second-class citizens" compared to dedicated tools” Gemini 3.5 Flash · negative prompt · soft negative
“Best for Tool Consolidation & Generous Free Tier: PostHog... incredibly generous free tier of 1 million feature flag requests per month” Gemini 3.5 Flash · budget prompt · first choice
“Start with PostHog if you want to track data alongside your flags.” GLM 4.7 FlashX · budget prompt · first choice
“Best default for a budget-conscious company: PostHog.” GPT-6 Luna · budget prompt · first choice
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.