Fullstory vs PostHog
Two of fourteen models named Fullstory first on the direct prompt; two named PostHog. Both were named by all fourteen models and Fullstory carries 53 labels and PostHog 37, so the shares are not directly comparable.
Named in four categories this edition.
Named in seven categories 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 session replay and heatmaps page.
By framing
FullstoryFirst choices, of fourteen modelsPostHog
Across every category in the October 2026 Edition, Fullstory and PostHog were named in the same answer ninety-six times, of the 238 answers naming Fullstory and the 386 naming PostHog. In those answers PostHog took the first choice nine times and Fullstory eleven.
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 | | | |
Fullstory PostHog first choice named as an alternative argued againstblank: not namedEach cell is one answer, Fullstory on the left and PostHog on the right.The direct prompt
Fullstory first, PostHog an alternative
2 of 14 modelsPostHog was named in the answer but not as the choice, or not at all.PostHog first, Fullstory an alternative
2 of 14 modelsFullstory was named in the answer but not as the choice, or not at all.Neither was the first choice, one was named
5 of 14 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
5 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
Fullstory9%#3 of 10PostHog7%#4 of 10Fullstory28%#1 of 12PostHog2%#8 of 12What the models said about Fullstory
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Five of six in this category shown.
“Captures enormous amounts of data; privacy and compliance concerns under GDPR/CCPA; may collect more data than teams can realistically act on” Kimi K2 · negative prompt · hard negative
“Skip FullStory/Quantum Metric: While excellent, these tools are generally priced for large enterprises” Qwen 3.7 Flash · direct prompt · hard negative
“If you need high-fidelity replay + search/queryable session intelligence and SOC2-grade compliance: FullStory.” Muse Glimmer 30B · direct prompt · first choice
“FullStory and PostHog mask all text by default ... the "mask by default" approach is significantly safer” Claude Haiku 4.5 · negative prompt · first choice
“Go with FullStory or Contentsquare for deep session replay and journey analytics.” GLM 4.7 FlashX · comparative 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. Three of three in this category shown.
“PostHog does offer data scrubbing features, but I was recently surprised to see their announcement about integrating AI to analyze session replays on behalf of users. This raises a red flag” Muse Glimmer 30B · negative prompt · soft negative
“If you enable network capture, scrutinize it separately from replay masking: requests and responses can contain sensitive headers or bodies” GPT-6 Luna · negative prompt · soft negative
“I'd generally recommend PostHog if you want the best balance of visitor behavior analytics, product analytics, and session replay in one place” GPT-5.4 mini · paraphrase 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.