September 2026 Edition, expanded tier · The six flagship models on every category, as published . The public index runs on the standard tier; this record is what the Expanded Edition Pack delivers on one category. The category page →
Index › GTM › GTM data and infrastructure › Product analytics · September 2026 Edition

Product analytics

Asked as “product analytics platform”, and as “product analytics tool”, on behalf of a mid-market B2B software company. 29 first choices recorded across the direct, paraphrase, budget and scale prompts, six models each.
Standing · first-choice share
38%
Contested · Mixpanel 34%
38Amplitude34Mixpanel24PostHog03others

38% of first choices, contested.

The standing

Share is the count of first choices across the direct, paraphrase, budget and scale prompts, over all six models, for a mid-market B2B software company. Ordered by share.
ProductFirst-choice shareNegative rateLabelsQuadrantSince September 2026
01Amplitude38%23%35endorsed leadernewNew since September 2026: not ranked then, 38% now.
02Mixpanel34%12%34endorsed leadernewNew since September 2026: not ranked then, 34% now.
03PostHog24%12%34accepted challengernewNew since September 2026: not ranked then, 24% now.
04Pendo3%16%25accepted challengernewNew since September 2026: not ranked then, 3% now.
Show the two products at 0%, ordered by negative rate
06Google Analytics 4 Lab in the set0%56%16criticized challengernewNew since September 2026: not ranked then, 0% now.
05Heap0%27%22criticized challengernewNew since September 2026: not ranked then, 0% now.

The floor is 12 points of share, measured: how far the models move a leader on their own when the same questions are asked twice with nothing changed. A larger change is movement; a smaller one can't be told apart from repeat variation, and both are shown. Each index measures its own floor from its own repeat, over its own categories, so the floor differs from one index to the next. How the floor is measured

Bars are the share of first choices, 0 to 100Every product with at least 10 labels here. Every product name links to its product page.

Google Analytics 4 is made by Google, whose model Gemini 3.1 Pro is in the set. On the four share prompts that model made it the first choice zero times of 4; the other five models zero times of 20. Lab treatment is defined on the method page; the row is marked, not excluded.

All six head-to-head pages: the top four products, each against each

Recommended versus criticized

Every product with at least 10 labels here, on both axes. The 30% line names a quadrant, not the verdict above: that one needs more than 40%.

Criticized challengerCriticized default
Negative label rate →
01
02
03
04
05
06
Accepted challengerEndorsed leader
0%First-choice share → · lines at 30% share and 25% negative50%
Key
01Amplitude38%
02Mixpanel34%
03PostHog24%
04Pendo3%
05Heap0%
06Google Analytics 40%

What they warned about

Two of six models held their first choice under the paraphrase. Claude Opus 4.8, GPT-6 Astra, Gemini 3.1 Pro and Perplexity Sonar Pro changed. A high negative share on a product with few labels is a warning. A low share on a product with many labels is salience, not sentiment.
Google Analytics 4
56%
9 of 16 labels negative · 6 of 6 models · 4 hard negative
“I'd avoid this for actual product analytics (as opposed to marketing attribution). Data sampling and cardinality thresholding make funnel and retention numbers unreliable” Claude Opus 5, negative prompt
Heap
27%
6 of 22 labels negative · 5 of 6 models · 1 hard negative
“You should avoid seeking out or signing new contracts ... Heap Analytics: ... It no longer exists as a standalone company” Gemini 3.1 Pro, negative prompt
Amplitude
23%
8 of 35 labels negative · 5 of 6 models
“Amplitude only if depth of behavioral analysis is genuinely the bottleneck — otherwise its usage-based pricing tends to outgrow a limited budget fastest” Claude Opus 5, budget prompt
PostHog
12%
4 of 34 labels negative · 4 of 6 models · 1 hard negative
“I would avoid treating that deployment as a supported enterprise offering” GPT-6 Astra, negative prompt

What they cite

Six of the six models returned a source list in this edition: six return the pages they cited.

Sites the answers cite

32 of 36 answers in this category came back with a source list, from 6 of 6 models: citations where the model returns them, or the search results it consulted. 579 links across 187 sites, every framing counted. Ranked by the number of answers carrying the site or page. None of the 36 answers across every segment cited this index's own page for the category.

vendor site · Amplitude27 answers · 46 citations · 5 models
vendor site · PostHog21 answers · 30 citations · 6 models
vendor site · Pendo21 answers · 21 citations · 5 models
vendor site · Mixpanel16 answers · 23 citations · 4 models
vendor site · Userpilot13 answers · 18 citations · 4 models
12 answers · 22 citations · 4 models
12 answers · 13 citations · 3 models
vendor site · Gainsight12 answers · 12 citations · 3 models
11 answers · 12 citations · 3 models
9 answers · 9 citations · 3 models
vendor site · Heap8 answers · 10 citations · 5 models
vendor site · Fullstory8 answers · 8 citations · 3 models

Pages the answers cite

The ten pages named in the most answers, by full address. A page here is one the models returned with a recommendation, not one the index endorses.

Search against answers

Each company's standing in the answers beside its site's footprint in Google search, one row a site: the products the models named on it with their shares, and the share they add up to; monthly searches on Google, and DataForSEO's estimate of AI search demand (modeled from search signals, directional, not a count of queries to any assistant), for the most-searched of the company's and its products' names (the name is in each row's hover text); estimated monthly organic visits to the site; and its best position in Google's top ten for “best product analytics platform”, “product analytics platform”. US estimates from DataForSEO and Google's Ads Transparency Center. A small company's site, or a mid-sized company's site for its flagship, is marked company; a product on a large parent's site (Google, Microsoft) has no site figures. A column with no figures for this category is left out, and an empty cell means none were seen, not none exist. Two measurements side by side: neither is read as the cause of the other.
Company and productsShareOwn site citedName searches, GoogleAI search demand, est.Organic visitsPaid search a month, est.Google ads, last 30 daysBest Google position
Amplitude amplitude.com38%41874,0005,691373,273$207272
Mixpanel mixpanel.com34%46712,10045820,284$45811
PostHog posthog.com24%42033,10027125,936120
Pendo pendo.io3%40912,10076119,185$3,60993
Contentsquare heap.io
Heap 0%
0%15040,50011,45416,541327
Matomo matomo.org0%1601,9008735,0159
Kubit kubit.ai0%4
Mitzu mitzu.io0%3
Gainsight PX gainsight.com0%27260459,569589
Contentsquare contentsquare.com0%1842,900101149,92586

Google's top ten for the two searches hold 16 sites; 7 of them are among the sites the models cited here (amplitude.com, fullstory.com, gainsight.com, heap.io, learn.g2.com, userpilot.com, visionlabs.com). The first result for “best product analytics platform” is domo.com.

How they answered

Six framings of the same buying question, each sent to every model in a fresh session with search on. One row per model, so a row shows whether it held its answer under rewording, what it named when cost was the constraint, and what it argued against. Computed from the raw judge labels.
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ModelDirect“What is the best product analytics platform for a mid-market B2B software company?”Paraphrase“Which product analytics tool would you recommend to a mid-sized B2B software company?”Comparative“What are the top product analytics platforms and how do they differ?”Budget-constrained“What is the best product analytics platform for a company with a limited budget?”Scale-constrained“We are a 500 person company evaluating a product analytics platform. What should we look at?”Negative“Which product analytics platforms should I avoid or be cautious about?”
Claude Opus 5Mixpanel
Three alternativesAmplitude, Pendo, PostHog
MixpanelHeld
Four alternativesGainsight PX, Heap, Pendo, PostHog
against: Amplitude
no first choice
Four alternativesAmplitude, Heap, Mixpanel, PostHog
PostHog
One alternativeMixpanel
against: Amplitude
Amplitude, Mixpanel, PostHog
Three alternativesKubit, Mitzu, Pendo
against: Amplitude, Google Analytics 4, Heap, Indicative, Interana, Kissmetrics, Localytics, Mixpanel, Pendo, PostHog, Woopra
Claude Opus 4.8Amplitude, Mixpanel
Three alternativesHeap, Pendo, PostHog
AmplitudeChanged
Two alternativesMixpanel, PostHog
Amplitude, Mixpanel
Two alternativesHeap, PostHog
against: Google Analytics 4
PostHog
Three alternativesAmplitude, Google Analytics 4, Mixpanel
no first choiceagainst: Google Analytics 4
GPT-6 AstraAmplitude
Three alternativesMixpanel, Pendo, PostHog
MixpanelChanged
Three alternativesAmplitude, Pendo, PostHog
Amplitude, Mixpanel
Four alternativesFullstory, Heap, Pendo, PostHog
PostHog
One alternativeAmplitude
Amplitude, Mixpanel
Three alternativesHeap, Pendo, PostHog
against: Amplitude, Google Analytics 4, Heap, Mixpanel, Pendo, PostHog
GPT-5.6 SolAmplitude
Three alternativesMixpanel, Pendo, PostHog
AmplitudeHeld
Three alternativesMixpanel, Pendo, PostHog
Amplitude
Five alternativesFullstory, Heap, Mixpanel, Pendo, PostHog
against: Google Analytics 4, Snowplow
PostHog
Three alternativesAmplitude, Google Analytics 4, Mixpanel
Amplitude, Mixpanel
Three alternativesContentsquare, Pendo, PostHog
against: Adobe Analytics, Amplitude, Fullstory, Google Analytics 4, Heap, Hotjar, Mixpanel, Pendo, PostHog
Gemini 3.1 ProAmplitude, Mixpanel
Three alternativesHeap, Pendo, PostHog
MixpanelChanged
Three alternativesAmplitude, Pendo, PostHog
Amplitude, Mixpanel
Three alternativesHeap, Pendo, PostHog
PostHog
Two alternativesAmplitude, Mixpanel
Amplitude
Two alternativesMixpanel, PostHog
against: Heap
against: Adobe Analytics, Amplitude, Contentsquare, Google Analytics 4, Heap, LogRocket, Statsig, Visual Studio App Center
Perplexity Sonar ProAmplitude
Two alternativesMixpanel, Pendo
PendoChanged
Three alternativesAmplitude, Mixpanel, PostHog
Amplitude
Five alternativesFullstory, Heap, Mixpanel, Pendo, PostHog
against: Google Analytics 4
Mixpanel, PostHog
One alternativeGoogle Analytics 4
against: Amplitude
no first choiceagainst: Amplitude, Fullstory, Google Analytics 4, Heap, Hotjar, Microsoft Clarity, Mixpanel, Pendo, PostHog
Bold is the first choiceAlternatives are counted; the count opens them.What the answer argued against

The record

One row per call: the version string exactly as returned, whether the model searched, sources cited, and latency.
Thirty-six rows: every prompt, every model, every answer.
PromptModelVersion stringTime (UTC)SearchedSourcesLatency
Direct recommendationClaude Opus 5claude-opus-52026-09-08 10:15yes3862 s
Direct recommendationClaude Opus 4.8claude-opus-4-82026-09-08 10:16yes3350 s
Direct recommendationGPT-6 Astragpt-6-astra2026-09-08 10:18yes536 s
Direct recommendationGPT-5.6 Solgpt-5.6-sol2026-09-08 10:18yes533 s
Direct recommendationGemini 3.1 Progemini-3.1-pro-preview2026-09-08 10:17yes645 s
Direct recommendationPerplexity Sonar Prosonar-pro2026-09-08 10:16yes206 s
ParaphraseClaude Opus 5claude-opus-52026-09-08 10:19yes3972 s
ParaphraseClaude Opus 4.8claude-opus-4-82026-09-08 10:20no016 s
ParaphraseGPT-6 Astragpt-6-astra2026-09-08 10:21yes631 s
ParaphraseGPT-5.6 Solgpt-5.6-sol2026-09-08 10:21yes536 s
ParaphraseGemini 3.1 Progemini-3.1-pro-preview2026-09-08 10:20no028 s
ParaphrasePerplexity Sonar Prosonar-pro2026-09-08 10:20yes175 s
ComparativeClaude Opus 5claude-opus-52026-09-08 10:22yes2860 s
ComparativeClaude Opus 4.8claude-opus-4-82026-09-08 10:23yes3850 s
ComparativeGPT-6 Astragpt-6-astra2026-09-08 10:25yes954 s
ComparativeGPT-5.6 Solgpt-5.6-sol2026-09-08 10:26yes868 s
ComparativeGemini 3.1 Progemini-3.1-pro-preview2026-09-08 10:24yes240 s
ComparativePerplexity Sonar Prosonar-pro2026-09-08 10:23yes2010 s
Budget constrainedClaude Opus 5claude-opus-52026-09-08 10:27yes4258 s
Budget constrainedClaude Opus 4.8claude-opus-4-82026-09-08 10:28yes3551 s
Budget constrainedGPT-6 Astragpt-6-astra2026-09-08 10:29yes333 s
Budget constrainedGPT-5.6 Solgpt-5.6-sol2026-09-08 10:30yes526 s
Budget constrainedGemini 3.1 Progemini-3.1-pro-preview2026-09-08 10:29yes1635 s
Budget constrainedPerplexity Sonar Prosonar-pro2026-09-08 10:28yes205 s
Scale constrainedClaude Opus 5claude-opus-52026-09-08 10:31yes3162 s
Scale constrainedClaude Opus 4.8claude-opus-4-82026-09-08 10:31no029 s
Scale constrainedGPT-6 Astragpt-6-astra2026-09-08 10:33yes538 s
Scale constrainedGPT-5.6 Solgpt-5.6-sol2026-09-08 10:34yes661 s
Scale constrainedGemini 3.1 Progemini-3.1-pro-preview2026-09-08 10:32no031 s
Scale constrainedPerplexity Sonar Prosonar-pro2026-09-08 10:31yes207 s
Negative framingClaude Opus 5claude-opus-52026-09-08 10:35yes3784 s
Negative framingClaude Opus 4.8claude-opus-4-82026-09-08 10:36yes3350 s
Negative framingGPT-6 Astragpt-6-astra2026-09-08 10:37yes637 s
Negative framingGPT-5.6 Solgpt-5.6-sol2026-09-08 10:39yes873 s
Negative framingGemini 3.1 Progemini-3.1-pro-preview2026-09-08 10:37yes1341 s
Negative framingPerplexity Sonar Prosonar-pro2026-09-08 10:36yes208 s

Noise floor in this category

Flips between the edition run and its calibration repeat. Six prompts per model is a small sample; the index-wide floor is the number to trust.

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Claude Opus 5
2 of 5 flipped
Claude Opus 4.8
4 of 4 flipped
GPT-6 Astra
0 of 5 flipped
GPT-5.6 Sol
1 of 5 flipped
Gemini 3.1 Pro
3 of 6 flipped
Perplexity Sonar Pro
4 of 4 flipped

Normalization in this category

Every judgment call made between the raw labels and the numbers above, listed so it is visible and reversible.

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Category-scoped readings
Amplitude read as Amplitude
Unresolved, counted raw
None awaiting human review.
Discontinued, still offered
No shut-down product was recommended here.
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