GTM AI Index
September 2026 Edition, expanded tier · The six flagship models on every category, as published September 9, 2026. 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 data and infrastructure September 2026 Edition

Tag management

Asked as “tag management system”, and as “website tag manager”, on behalf of a mid-market B2B software company. 47 first choices recorded across the direct, paraphrase, budget and scale prompts, six models each.
Standing
Clear leader
77% of first choices, clear leader.

01The 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 rateLabelsQuadrant
01Google Tag Manager77%19%72endorsed leader
02Tealium iQ9%36%36criticized challenger
03Tealium4%32%19criticized challenger
04Adobe Experience Platform Tags2%23%43accepted challenger
Show the six products at 0%, ordered by negative rate
10Ensighten0%47%15criticized challenger
07Segment0%10%31accepted challenger
06Piwik PRO0%9%33accepted challenger
05Matomo Tag Manager0%0%24accepted challenger
09Matomo0%0%15accepted challenger
08Piwik PRO Tag Manager0%0%12accepted challenger
Bars are the share of first choices, 0 to 100Every product with at least 10 labels here. Every product name links to its vendor page.

One product takes 77% of first choices here, so the chart would put nine markers in one corner and one at the far edge. The two measurements it plots are columns in the standing above: share, and the negative label rate. Three products carry a negative rate above 25% in this category. Jump to the standing

02What they warned about

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 Tag Manager
19%
14 of 72 labels negative · 10 of 6 models · 1 hard negative
“Avoid entirely: - Google Tag Manager for any privacy-conscious organization” Mistral Small, negative prompt
Adobe Experience Platform Tags
23%
10 of 43 labels negative · 8 of 6 models · 3 hard negative
“Avoid on a tight budget: ... Adobe Launch (bundled with expensive Adobe Cloud)” DeepSeek V4 Flash, budget prompt
Tealium iQ
36%
13 of 36 labels negative · 7 of 6 models · 2 hard negative
“they are generally **not recommended** for mid-market B2B companies” Gemini 3.5 Flash, direct prompt
Ensighten
47%
7 of 15 labels negative · 5 of 6 models · 4 hard negative
“Acquired by **CHEQ** in August 2022 ... Customer adoption has been declining since” DeepSeek V4 Flash, negative prompt

03What they cite

Citations exist only for the models that return a source list: four of the six in this edition.

Sites the answers cite

19 of 72 answers in this category came back with a source list, from 4 of 6 models: citations where the model returns them, or the search results it consulted. 6 of those lists are Google grounding redirects that name no site and are left out of the counts. 167 links across 65 sites, every framing counted. Ranked by the number of answers carrying the site or page. The other 2 models searched through a gateway that returned no source list on this edition.

vendor site · Tealium6 answers · 7 citations · 2 models
6 answers · 6 citations · 2 models
5 answers · 9 citations · 1 model
vendor site · 6sense5 answers · 5 citations · 2 models
5 answers · 5 citations · 1 model
vendor site · Gartner5 answers · 5 citations · 1 model
vendor site · Guideflow5 answers · 5 citations · 2 models
vendor site · ObservePoint5 answers · 5 citations · 1 model
vendor site · PeerSpot5 answers · 5 citations · 2 models
vendor site · Usercentrics5 answers · 5 citations · 1 model
vendor site · Google Search4 answers · 11 citations · 2 models
4 answers · 4 citations · 2 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.

04How 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.
ModelDirect“What is the best tag management system for a mid-market B2B company?”Paraphrase“Which website tag manager would you recommend to a mid-sized B2B company?”Comparative“What are the top tag management systems and how do they differ?”Budget-constrained“What is the best tag management system for a company with a limited budget?”Scale-constrained“We are a 500 person company evaluating a tag management system. What should we look at?”Negative“Which tag management systems should I avoid or be cautious about?”
Claude Opus 5no first choiceno first choiceno first choiceno first choiceno first choicenothing named
Claude Opus 4.8no first choiceno first choiceno first choiceno first choiceno first choicenothing named
GPT-6 Astrano first choiceno first choiceno first choiceno first choiceno first choicenothing named
GPT-5.6 Solno first choiceno first choiceno first choiceno first choiceno first choicenothing named
Gemini 3.1 Prono first choiceno first choiceno first choiceno first choiceno first choicenothing named
Perplexity Sonar Prono first choiceno first choiceno first choiceno first choiceno first choicenothing named
Bold is the first choiceAlternatives are counted; the count opens them.What the answer argued against

05The record

One row per call: the version string exactly as returned, whether the model searched, sources cited, and latency. Full answer text is in the free responses file. Download the record
Zero rows: every prompt, every model, every answer.
PromptModelVersion stringTime (UTC)SearchedSourcesLatency

Normalization in this category

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

Category-scoped readings
None. Every name in this category resolved on its own.
Unresolved, counted raw
AddThis
Adobe Dynamic Tag Manager (DTM)
Adobe Experience Platform (AEP) Data Collection / Tags
Adobe Experience Platform Tag Management
Falcon
Friendly Analytics
GTM
SonicWall Global Management System (GMS)
TAGGRS
TagGator
gtag.js
Discontinued, still offered
No shut-down product was recommended here.
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