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 for privacy

Proton Mail takes the top spot in 100.0% of resamples. Of 12 ranked brands, only 4 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.net198
Email encryption: Best protection for your data | mailboxmailbox.orgmailbox.org/en/security/?utm=airanks.net133
Security at Tuta | Tutatuta.comtuta.com/security?utm=airanks.net131
Proton Mail Support | Protonproton.meproton.me/support/mail?utm=airanks.net93
Privacy Policy - Proton Mail | Protonproton.meproton.me/mail/privacy-policy?utm=airanks.net92
Secure email service - ad-free & GDPR-compliant | mailboxmailbox.orgmailbox.org/en/product/mail/?utm=airanks.net86
How Safe is Proton Mail? Security Features Explained | Protonproton.meproton.me/mail/security?utm=airanks.net73
How Proton Mail messages are encrypted | Protonproton.meproton.me/support/proton-mail-encr…ed?utm=airanks.net72
Proton Mail: Get a free email account with privacy and encryption | Protonproton.meproton.me/mail?utm=airanks.net44
Proton’s end-to-end encryption — How we secure your data | Protonproton.meproton.me/security/end-to-end-encryption?utm=airanks.net43

The Ranking, With Its Uncertainty

Proton Mail locked Proton Mail — ci 1.00–1.00 · n=367 · 100.0% of resamples held this rank · named in 93% of answers
Tuta locked Tuta — ci 0.91–0.91 · n=367 · 100.0% of resamples held this rank · named in 94% of answers
Mailbox.org soft Mailbox.org — ci 0.73–0.82 · n=367 · 65.8% of resamples held this rank · named in 51% of answers
Gmail soft Gmail — ci 0.73–0.82 · n=367 · 65.8% of resamples held this rank · named in 35% of answers
Outlook locked Outlook — ci 0.64–0.64 · n=367 · 100.0% of resamples held this rank · named in 25% of answers
Thunderbird soft Thunderbird — ci 0.36–0.55 · n=367 · 69.7% of resamples held this rank · named in 12% of answers
Fastmail unsettled Fastmail — ci 0.27–0.55 · n=367 · 34.7% of resamples held this rank · named in 8% of answers
iCloud Mail contested iCloud Mail — ci 0.18–0.45 · n=367 · 50.9% of resamples held this rank · named in 11% of answers
Posteo contested Posteo — ci 0.18–0.45 · n=367 · 46.8% of resamples held this rank · named in 6% of answers
Sender contested Sender — ci 0.18–0.45 · n=367 · 56.6% of resamples held this rank · named in 5% of answers
Yahoo Mail firm Yahoo Mail — ci 0.00–0.09 · n=367 · 92.9% of resamples held this rank · named in 3% of answers
Mailfence gathering Mailfence — gathering data, n=367. 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

Mailbox.org

0.73–0.82

Gmail

0.73–0.82

Outlook

0.64–0.64

Thunderbird

0.36–0.55

Fastmail

0.27–0.55

iCloud Mail

0.18–0.45

Posteo

0.18–0.45

Sender

0.18–0.45

Yahoo Mail

0.00–0.09

11 of 12 brands measured · 15 dominance edges · 6 rungs · 11 pairs the data does not separate