Amplitude vs Fullstory
Zero of twelve models named Amplitude first on the direct prompt; zero named Fullstory. Amplitude was named by twelve of the twelve models and Fullstory by ten and Amplitude carries 38 labels and Fullstory 14, so the shares are not directly comparable.
United States. Named in nine categories this edition.
Named in four categories this edition.
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all twelve 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 customer intelligence and data science page.
By framing
AmplitudeFirst choices, of twelve modelsFullstory
Across every category in the September 2026 Edition, Amplitude and Fullstory were named in the same answer seventy-four times, of the 323 answers naming Amplitude and the 80 naming Fullstory. In those answers Fullstory took the first choice one time and Amplitude twenty-three.
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 | |
Amplitude Fullstory first choice named as an alternative argued againstblank: not namedEach cell is one answer, Amplitude on the left and Fullstory on the right.The direct prompt
Neither was the first choice, one was named
2 of 12 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
10 of 12 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
Amplitude6%#5 of 10Fullstory0%#– of 10Amplitude7%#2 of 14Fullstory0%#– of 14What the models said about Amplitude
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Two of two in this category shown.
“Who should avoid them: Startups without dedicated developers to write tracking code” Gemini 3.5 Flash · negative prompt · hard negative
“I'd usually recommend Amplitude if your main goal is to understand and improve the digital customer journey” GPT-5.4 mini · paraphrase prompt · first choice
What the models said about Fullstory
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Five of five in this category shown.
“Most heatmap and session recording tools (like Hotjar or FullStory) can get very expensive.” Qwen 3.7 Flash · budget prompt · soft negative
“Purely B2C-oriented tools like Heap, FullStory... weaker at account-level B2B analysis” DeepSeek V4 Flash · paraphrase prompt · soft negative
“Fullstory is the top choice for understanding users' behavior across digital platforms” Claude Haiku 4.5 · comparative prompt · first choice
“Start with FullStory if you are purely digital/service-focused.” Qwen 3.7 Flash · paraphrase prompt · first choice
“Choose Contentsquare or FullStory if you care most about user experience diagnosis and session replay.” GPT-5.4 mini · comparative prompt · alternative
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.