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.

Subcategory · AI Citation Index

Note-Taking

Note-taking is an AI discovery monopoly paired with evaluation-stage reversals. Notion appears in 100% of buyer queries across all four engines — ChatGPT, Claude, Gemini, and Perplexity — capturing total share of AI attention at the discovery stage. Microsoft 365 trails at 70% visibility, Google Workspace at 55%. But when buyers ask AI to compare options head-to-head, Notion loses most matchups: Slack wins 79% of its head-to-heads, Microsoft 365 wins 76%, while Notion scores just 29 out of 100 across nearly 200 comparison queries. The category is consolidated at discovery — one brand owns the shortlist — and contested at evaluation, where an absent giant (Slack) and a productivity-suite incumbent (Microsoft 365) win the fights Notion loses.

53 discovery queries · 308 head-to-heads · refreshed May 1, 2026

Discovery stage

The shortlist

Across 53 buyer-style "Note-Taking" queries

Most cited · Note-TakingLive

Notion

notion.so

Cited in 53 of 53 buyer questions for Note-Taking — surfaced by 3 of 3 AI engines.

ChatGPTGeminiClaude

Citation rate

100%

Visibility score63/100

See the full Notion profile→

Notion shows up in every buyer query about note-taking across ChatGPT, Claude, Gemini, and Perplexity. Microsoft 365 surfaces in 70% of those same queries on all four engines. Google Workspace lands at 55%, Coda at 40%, ClickUp at 28%. Six more brands — Goodnotes, Point, Scrivener, Zotero, and a few others — each surface on all four engines but appear in fewer than 19% of discovery prompts, signaling niche visibility.

Hover or click a logo to see brand details

X = coverage across discovery prompts · Y = engine diversity · Bubble size = total mentions

Tracked acrossChatGPT,Gemini,Claude

Get weekly AI visibility changes for Note-Taking sent to your inbox.

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.

Notion

10/10

Microsoft

5/10

Default

5/10

Google Workspace

4/10

ClickUp

4/10

Notion

6/6

Coda

6/6

Microsoft

6/6

Google Workspace

4/6

ClickUp

4/6

Notion

6/6

Plan

6/6

Microsoft

6/6

Coda

4/6

ClickUp

4/6

Microsoft

5/5

Notion

4/5

Plan

4/5

Confluence

4/5

Google Workspace

4/5

Notion

4/4

Zotero

4/4

Scrivener

3/4

Default

2/4

Coda

2/4

Notion

4/4

Goodnotes

4/4

Microsoft

4/4

Google Workspace

4/4

Default

3/4

Notion

4/4

Microsoft

3/4

Google Workspace

2/4

TickTick

2/4

Stable

1/4

Confluence

4/4

Notion

4/4

Plan

3/4

Microsoft

2/4

Fireflies.ai

2/4

≥50% cited

25–49%

<25%

Topics are discovery-stage prompt clusters · note-taking

Evaluation stage

Head-to-head

How often AI cites each brand across uniform category evaluation prompts · median 21/100

When buyers ask AI to pick between options, Slack wins 79% of its head-to-heads and Microsoft 365 wins 76%, despite thin discovery share — Slack barely surfaces in AI discovery prompts at all. Notion loses most comparison queries, scoring 29 out of 100 across nearly 200 matchups. ClickUp scores 13, Basecamp 10. Zoho Notebook appears in ten head-to-heads but wins none.

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 21/100

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