AEO Audit is a free tool that scores B2B SaaS websites for AI search visibility — how likely they are to be cited by ChatGPT, Perplexity, and Google AI Overviews when B2B buyers search.

What is AI Engine Optimization (AEO)?

AI Engine Optimization (AEO) is the practice of structuring content, entity signals, and technical infrastructure so that AI engines cite your brand in generated answers. It extends traditional SEO to cover ChatGPT, Perplexity, Gemini, and Google AI Overviews.

Yes. AEO Audit is free. Enter any B2B SaaS brand and receive a full AI visibility score with prioritised recommendations.

How does AEO Audit score websites?

AEO Audit scores across six pillars: AI Visibility (22%), Brand Authority (23%), Content Quality (18%), Platform Optimization (15%), Structured Data (12%), and Technical AEO (10%). Each pillar reflects specific signals that AI engines use when deciding which sources to cite.

Category · AI Citation Index

Content & Knowledge

Content & Knowledge is a fragmented category with no single AI favorite. Notion captures eyeballs in 79% of discovery queries and surfaces on every engine, but head-to-head comparisons tell a different story: Tettra is the consensus pick, winning more matchups than it loses despite showing up in only 28% of discovery prompts. The kingmakers are Ahrefs, Archbee, and Contentful — brands that appear in many head-to-head comparisons and score above the median. The absent giants are Semrush, MarketMuse, and Prismic: they win most of their head-to-heads but AI engines rarely surface them in discovery. Nuclino is the riser, gaining 13 points in visibility recently, while Webflow is the faller, down 9 points. This is a contested category where discovery share and evaluation wins split across different brands.

475 discovery queries · 139 head-to-heads · refreshed May 1, 2026

Discovery stage

The shortlist

Across 475 buyer-style "Content & Knowledge" queries

Most cited · Content & KnowledgeLive

notion.so

Cited in 373 of 475 buyer questions for Content & Knowledge

ChatGPT—Gemini—Claude—

Citation rate

79%

See the full notion.so profile→

Notion dominates AI discovery, surfacing in 79% of buyer queries across all engines tracked. Structuredweb and Microsoft 365 follow at 73% and 51%, both visible on four engines. Tettra, Document360, and Coda each show up on every engine but capture smaller shares — 28%, 25%, and 23% respectively. The next tier trails sharply: evergreen.so, Contently, and StoryChief each surface on all engines but in fewer than 5% of queries, leaving fragile visibility beyond their single-prompt niches.

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Score shifts, new entrants, citation gaps — every Monday.

Signal by intent

By topic

Top 5 most-cited brands per intent cluster. Brands with zero citations in a topic are not shown.

Built

52/54

Notion

41/54

Microsoft

34/54

Internal

28/54

Google Workspace

23/54

Built

26/28

Notion

25/28

Confluence

22/28

Internal

20/28

Live

17/28

Internal

12/13

Notion

11/13

Built

10/13

Confluence

9/13

Plan

8/13

Notion

7/10

Internal

6/10

Built

6/10

Plan

6/10

Webflow

4/10

Built

9/9

Internal

6/9

Live

6/9

Plan

5/9

Notion

4/9

Built

6/8

Contentful

5/8

Default

5/8

Sanity

5/8

Notion

5/8

Internal

7/7

Confluence

7/7

Notion

7/7

Built

7/7

Document360

7/7

Built

6/6

Notion

6/6

Default

6/6

Microsoft

4/6

Google Workspace

4/6

≥50% cited

25–49%

<25%

Topics are discovery-stage prompt clusters · content-knowledge

Evaluation stage

Head-to-head

How often AI cites each brand across uniform category evaluation prompts · median 51/100

When buyers ask AI to compare options, Nuclino, Loom, and Ahrefs win more head-to-heads than they lose, scoring 65, 64, and 63 across 10-14 comparison queries each. Tettra and Semrush split the middle at 58, while Clearscope, Writer, and Directus lose more matchups than they win, scoring 55, 55, and 54. Ahrefs is the kingmaker here, appearing in 14 head-to-heads — the highest volume in the category.

Hover or click a logo to see brand details

X = evaluation citation rate · Y = evaluation prompts cited in · Bubble size = citation exposure

Median citation rate 51/100

Each brand's score is the share of category evaluation prompts where AI cited them across all four engines — the same prompt pool for every brand. Brands above the median citation rate have stronger presence in evaluation-stage queries.

Brands to know

In this category

Ahrefs

Kingmaker

SEO toolkit with content research

Read brand profile →

Semrush

Absent giant

All-in-one marketing analytics suite

Read brand profile →

Nuclino

Riser

Lightweight team knowledge hub

Read brand profile →

Contentful

Kingmaker

Headless CMS for omnichannel content

Read brand profile →

Tettra

Consensus pick

Internal wiki for company knowledge

Read brand profile →

Citation sources

Where AI pulls citations from

1000 citations captured across Content & Knowledge prompt runs.

Vendor pages

205

Product, help, and marketing pages from tracked vendors

Independent sources

160

Reviews, encyclopedias, forums, press — not vendor-owned

Buyer questions

What AI cites for top Content & Knowledge questions

Most queries here are top-of-funnel exploration. Buyers ask AI for knowledge-base tools by team role ('what tools do customer success teams use for knowledge bases'), asset-management tools by use case ('tools brand teams use for managing brand guidelines'), and best practices for remote-team environments. A smaller slice digs into compliance, vendor selection criteria ('what should I look for in content and knowledge management software'), and cost beyond licensing ('true cost of content management software'). Trust and conversion questions make up less than 5% of the mix, often asking which tools enterprise security teams rely on or which have the fewest customer complaints.