# Microsoft Clarity vs Fullstory: which do AI models recommend for session replay, October 2026

GTM AI Recommendation Index, October 2026 Edition, Session replay and heatmaps. Zero of fourteen models named Microsoft Clarity first on the direct prompt; two named Fullstory. Page: https://gtm-ai-index.com/gtm-data/session-replay-and-heatmaps/microsoft-clarity-vs-fullstory/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Microsoft Clarity | 33% | #1 of 10 | 20% | 59 | 14 of 14 |
| Fullstory | 9% | #3 of 10 | 42% | 53 | 14 of 14 |

## The direct prompt, model by model

- Perplexity Sonar: fullstory first (first choices: Fullstory) (alternatives: Hotjar, LogRocket)
- Muse Glimmer 30B: fullstory first (first choices: Fullstory) (alternatives: Contentsquare, Heap, Hotjar, Microsoft Clarity, PostHog, VWO)
- Grok 4.1 Fast: neither first, one named (first choices: Hotjar) (alternatives: LogRocket, Microsoft Clarity, Mouseflow)
- Mistral Small: neither first, one named (first choices: Hotjar, Lucky Orange) (alternatives: Fullstory, PostHog, UXCam)
- DeepSeek V4 Flash: neither first, one named (first choices: PostHog) (alternatives: Hotjar, LogRocket, Microsoft Clarity, Mouseflow)
- Llama 4 Maverick: neither first, one named (first choices: Smartlook) (alternatives: Adobe Analytics, Fullstory)
- GLM 4.7 FlashX: neither first, one named (first choices: Hotjar) (alternatives: Crazy Egg, Fullstory, Microsoft Clarity, Mouseflow)
- MiniMax M2.5: neither first, one named (first choices: Mixpanel) (alternatives: Fullstory, PostHog, UXCam)
- GPT-6 Luna: neither first, one named (first choices: PostHog) (alternatives: Fullstory, Hotjar)
- Claude Haiku 4.5: neither named (first choices: Mouseflow) (alternatives: Hotjar)
- GPT-5.4 mini: neither named (first choices: Contentsquare, Mouseflow) (alternatives: LogRocket)
- Gemini 3.5 Flash: neither named (first choices: Pendo) (alternatives: LogRocket, Mouseflow, PostHog)
- Qwen 3.7 Flash: neither named (first choices: Hotjar) (alternatives: LogRocket, Matomo)
- Kimi K2: neither named (first choices: Hotjar) (alternatives: LogRocket, Mouseflow, Smartlook)

## What the models said about Microsoft Clarity

- "Both Hotjar (now part of Contentsquare) and Microsoft Clarity are consent-agnostic by default: paste the snippet in and they start recording on the first pageview." (Muse Glimmer 30B, negative prompt, hard negative)
- ""Free" but with a substantial tracking footprint that privacy teams should scrutinize; starts recording immediately without waiting for consent" (Kimi K2, negative prompt, hard negative)
- ""Free" option with aggressive tracking... Limited default redaction; privacy teams flag its footprint. US-hosted; consent bypass risks in EU." (Grok 4.1 Fast, negative prompt, hard negative)
- "Microsoft Clarity is the best free option for behaviour analytics, with unlimited session recordings and heatmaps and no paid tier required." (Muse Glimmer 30B, paraphrase prompt, first choice)
- "Microsoft Clarity delivers unlimited session replays and heatmaps at no cost, making it a favorite for startups and high-traffic sites." (Muse Glimmer 30B, comparative prompt, first choice)
- "The best session replay and heatmap tool for a company with a limited budget is Microsoft Clarity, as it is free with no session cap." (Llama 4 Maverick, budget prompt, first choice)

## What the models said about Fullstory

- "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)

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. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.