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 provider

Gmail takes the top spot in 100.0% of resamples. Of 14 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.net256
Create a free email account or choose a paid plan | Protonproton.meproton.me/mail/pricing?utm=airanks.net239
How your Google storage works - Gmail Helpsupport.google.comsupport.google.com/mail/answer/9312312?utm=airanks.net110
Storage limits in Outlook.com | Microsoft Supportsupport.microsoft.comsupport.microsoft.com/en-US/Outloo…om?utm=airanks.net108
Plans & Pricing to Upgrade Your Cloud Storage - Google Oneone.google.comone.google.com/about/plans?utm=airanks.net87
Compare Flexible Pricing Plan Options | Google Workspaceworkspace.google.comworkspace.google.com/pricing?utm=airanks.net77
Gmail: Private & Secure Email for Personal or Business | Google Workspaceworkspace.google.comworkspace.google.com/products/gmail/?utm=airanks.net70
Best email hosting services of 2026www.techradar.comtechradar.com/news/best-email-host…rs?utm=airanks.net39
Gmail: Secure Business Email Service | Google Workspaceworkspace.google.comworkspace.google.com/lp/gmail-for-…s/?utm=airanks.net38
Upgrade Outlook with Microsoft 365 | Microsoft 365www.microsoft.commicrosoft.com/en-us/microsoft-365/…ng?utm=airanks.net37

The Ranking, With Its Uncertainty

Gmail locked Gmail — ci 1.00–1.00 · n=365 · 100.0% of resamples held this rank · named in 76% of answers
Proton Mail locked Proton Mail — ci 0.92–0.92 · n=365 · 100.0% of resamples held this rank · named in 100% of answers
Fastmail locked Fastmail — ci 0.85–0.85 · n=365 · 100.0% of resamples held this rank · named in 84% of answers
Outlook locked Outlook — ci 0.77–0.77 · n=365 · 100.0% of resamples held this rank · named in 67% of answers
Brevo contested Brevo — ci 0.54–0.69 · n=365 · 47.7% of resamples held this rank · named in 4% of answers
iCloud Mail unsettled iCloud Mail — ci 0.54–0.69 · n=365 · 15.4% of resamples held this rank · named in 4% of answers
Mailchimp contested Mailchimp — ci 0.54–0.69 · n=365 · 46.8% of resamples held this rank · named in 4% of answers
ConvertKit firm ConvertKit — ci 0.31–0.46 · n=365 · 81.5% of resamples held this rank · named in 2% of answers
MailerLite gathering MailerLite — gathering data, n=365. No bootstrap interval yet.
HubSpot gathering HubSpot — gathering data, n=365. No bootstrap interval yet.
Klaviyo gathering Klaviyo — gathering data, n=365. No bootstrap interval yet.
Zoho gathering Zoho — gathering data, n=365. No bootstrap interval yet.
Active Campaign gathering Active Campaign — gathering data, n=365. No bootstrap interval yet.
AWS gathering AWS — gathering data, n=365. 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

1.00–1.00

Proton Mail

0.92–0.92

Fastmail

0.85–0.85

Outlook

0.77–0.77

Brevo

0.54–0.69

iCloud Mail

0.54–0.69

Mailchimp

0.54–0.69

ConvertKit

0.31–0.46

8 of 14 brands measured · 9 dominance edges · 6 rungs · 3 pairs the data does not separate