AIRANKS — The Authoritative Rankings for AI Web Content

AIRANKS measures AI visibility: we ask AI models real product and service questions, capture the complete answers as immutable observations, and publish what they contain — which brands were mentioned, which domains were cited, and which exact pages were linked. Every domain gets an AIR score from 1–10 (a decile of visibility in the active dataset; 0 means insufficient data), with the methodology in the open.

AIR

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The Question

← all rankings / dataset COBALT

What is the best email service

Gmail takes the top spot in 94.2% of resamples. Of 8 ranked brands, only 5 hold a position we'd call firm.

0
answers sampled
0
brands named
1,000
bootstrap resamples

Who AI Cites For This Question

25 cited pages · bars vs the leader

Pricing | Fastmailwww.fastmail.comfastmail.com/pricing/us/?utm=airanks.net226
Create a free email account or choose a paid plan | Protonproton.meproton.me/mail/pricing?utm=airanks.net189
Storage limits in Outlook.com | Microsoft Supportsupport.microsoft.comsupport.microsoft.com/en-US/Outloo…om?utm=airanks.net155
How your Google storage works - Gmail Helpsupport.google.comsupport.google.com/mail/answer/9312312?utm=airanks.net148
Gmail: Secure, AI-Powered Email for Everyone | Google Workspaceworkspace.google.comworkspace.google.com/intl/en/gmail/?utm=airanks.net45
Proton Mail: Sign-upaccount.proton.meaccount.proton.me/mail/signup?utm=airanks.net38
Plans & Pricing to Upgrade Your Cloud Storage - Google Oneone.google.comone.google.com/about/plans?utm=airanks.net36
Gmail: Private & Secure Email for Personal or Business | Google Workspaceworkspace.google.comworkspace.google.com/products/gmail/?utm=airanks.net32
Proton plans explained: Proton Free, Proton Mail Plus, Proton Unlimited, Proton Duo, Proton Family, and Proton Visionary | Protonproton.meproton.me/support/proton-plans?utm=airanks.net32
Manage your storage in Drive, Gmail & Photos - Gmail Helpsupport.google.comsupport.google.com/mail/answer/6374270?utm=airanks.net31

The Ranking, With Its Uncertainty

Gmail firm Gmail — ci 0.86–1.00 · n=376 · 94.2% of resamples held this rank · named in 72% of answers
Proton Mail firm Proton Mail — ci 0.86–1.00 · n=376 · 94.2% of resamples held this rank · named in 100% of answers
Fastmail locked Fastmail — ci 0.71–0.71 · n=376 · 100.0% of resamples held this rank · named in 81% of answers
Outlook locked Outlook — ci 0.57–0.57 · n=376 · 100.0% of resamples held this rank · named in 70% of answers
iCloud Mail locked iCloud Mail — ci 0.43–0.43 · n=376 · 100.0% of resamples held this rank · named in 26% of answers
Zoho gathering Zoho — gathering data, n=376. No bootstrap interval yet.
Tuta gathering Tuta — gathering data, n=376. No bootstrap interval yet.
Thunderbird gathering Thunderbird — gathering data, n=376. No bootstrap interval yet.

The Incomparability Lattice

what the intervals separate, not what the list claims

An edge means one brand's interval sits strictly above another's — zero overlap. No edge between two brands is not a gap in the drawing, it is the finding: their intervals overlap, and the bootstrap cannot tell them apart. Brands on the same rung are incomparable, not tied — the ranking above orders them anyway because a list has to print a total order; this diagram is the honest version.

Gmail

0.86–1.00

Proton Mail

0.86–1.00

Fastmail

0.71–0.71

Outlook

0.57–0.57

iCloud Mail

0.43–0.43

5 of 8 brands measured · 4 dominance edges · 4 rungs · 1 pair the data does not separate