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 private email service

Proton Mail takes the top spot in 100.0% of resamples. Of 12 ranked brands, only 6 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

Everything you need to know about Tuta's encryption. | Tutatuta.comtuta.com/encryption?utm=airanks.net180
How Safe is Proton Mail? Security Features Explained | Protonproton.meproton.me/mail/security?utm=airanks.net99
Secure email service - ad-free & GDPR-compliant | mailboxmailbox.orgmailbox.org/en/product/mail/?utm=airanks.net97
Security at Tuta | Tutatuta.comtuta.com/security?utm=airanks.net86
Proton Mail Support | Protonproton.meproton.me/support/mail?utm=airanks.net65
How Proton Mail messages are encrypted | Protonproton.meproton.me/support/proton-mail-encr…ed?utm=airanks.net61
Open Source - Why is it important? | Tutatuta.comtuta.com/open-source?utm=airanks.net58
Proton Mail: Get a free email account with privacy and encryption | Protonproton.meproton.me/mail?utm=airanks.net55
Email encryption: Best protection for your data | mailboxmailbox.orgmailbox.org/en/security/?utm=airanks.net51
Create a free email account or choose a paid plan | Protonproton.meproton.me/mail/pricing?utm=airanks.net47

The Ranking, With Its Uncertainty

Proton Mail locked Proton Mail — ci 1.00–1.00 · n=373 · 100.0% of resamples held this rank · named in 95% of answers
Tuta locked Tuta — ci 0.91–0.91 · n=373 · 100.0% of resamples held this rank · named in 90% of answers
Gmail locked Gmail — ci 0.82–0.82 · n=373 · 100.0% of resamples held this rank · named in 36% of answers
Fastmail contested Fastmail — ci 0.64–0.73 · n=373 · 60.6% of resamples held this rank · named in 35% of answers
Mailbox.org contested Mailbox.org — ci 0.64–0.73 · n=373 · 60.6% of resamples held this rank · named in 38% of answers
Outlook locked Outlook — ci 0.55–0.55 · n=373 · 98.0% of resamples held this rank · named in 19% of answers
Thunderbird locked Thunderbird — ci 0.45–0.45 · n=373 · 98.0% of resamples held this rank · named in 16% of answers
iCloud Mail locked iCloud Mail — ci 0.36–0.36 · n=373 · 100.0% of resamples held this rank · named in 16% of answers
Posteo contested Posteo — ci 0.09–0.27 · n=373 · 54.7% of resamples held this rank · named in 2% of answers
Sender contested Sender — ci 0.09–0.27 · n=373 · 52.0% of resamples held this rank · named in 2% of answers
Yahoo Mail gathering Yahoo Mail — gathering data, n=373. No bootstrap interval yet.
Mailfence gathering Mailfence — gathering data, n=373. 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.

Proton Mail

1.00–1.00

Tuta

0.91–0.91

Gmail

0.82–0.82

Fastmail

0.64–0.73

Mailbox.org

0.64–0.73

Outlook

0.55–0.55

Thunderbird

0.45–0.45

iCloud Mail

0.36–0.36

Posteo

0.09–0.27

Sender

0.09–0.27

10 of 12 brands measured · 10 dominance edges · 8 rungs · 2 pairs the data does not separate