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

PHRASE

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The Question

← all rankings / dataset COBALT

What is the best email service for deliverability

Postmark takes the top spot in 100.0% of resamples. Of 14 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

Email sender guidelines - Gmail Helpsupport.google.comsupport.google.com/mail/answer/81126?utm=airanks.net279
Dedicated IP addresses for Amazon SES - Amazon Simple Email Servicedocs.aws.amazon.comdocs.aws.amazon.com/ses/latest/dg/…ml?utm=airanks.net99
What types of messages are a good fit for Postmark? | Postmark Support Centerpostmarkapp.compostmarkapp.com/support/article/10…rk?utm=airanks.net81
Email sender guidelines FAQ - Gmail Helpsupport.google.comsupport.google.com/mail/answer/14229414?utm=airanks.net79
A better way to send all your application emailpostmarkapp.compostmarkapp.com/message-streams?utm=airanks.net66
How to create and send through Message Streams | Postmark Support Centerpostmarkapp.compostmarkapp.com/support/article/ho…ms?utm=airanks.net61
Best practices for sending email using Amazon SES - Amazon Simple Email Servicedocs.aws.amazon.comdocs.aws.amazon.com/ses/latest/dg/…ml?utm=airanks.net58
Troubleshooting email delivery issues | Postmark Support Centerpostmarkapp.compostmarkapp.com/support/article/tr…es?utm=airanks.net39
Amazon Simple Email Service Documentationdocs.aws.amazon.comdocs.aws.amazon.com/ses/?utm=airanks.net37
Sender Best Practices | Sender Hubsenders.yahooinc.comsenders.yahooinc.com/best-practices/?utm=airanks.net30

The Ranking, With Its Uncertainty

Postmark locked Postmark — ci 1.00–1.00 · n=368 · 100.0% of resamples held this rank · named in 77% of answers
Klaviyo locked Klaviyo — ci 0.92–0.92 · n=368 · 100.0% of resamples held this rank · named in 47% of answers
Gmail locked Gmail — ci 0.85–0.85 · n=368 · 99.8% of resamples held this rank · named in 38% of answers
Mailchimp firm Mailchimp — ci 0.69–0.77 · n=368 · 87.6% of resamples held this rank · named in 25% of answers
Brevo firm Brevo — ci 0.69–0.77 · n=368 · 87.8% of resamples held this rank · named in 19% of answers
MailerLite unsettled MailerLite — ci 0.31–0.62 · n=368 · 38.0% of resamples held this rank · named in 6% of answers
Yahoo Mail unsettled Yahoo Mail — ci 0.31–0.62 · n=368 · 31.9% of resamples held this rank · named in 9% of answers
Sender unsettled Sender — ci 0.31–0.62 · n=368 · 21.4% of resamples held this rank · named in 4% of answers
HubSpot unsettled HubSpot — ci 0.31–0.62 · n=368 · 24.4% of resamples held this rank · named in 6% of answers
Outlook unsettled Outlook — ci 0.31–0.54 · n=368 · 37.0% of resamples held this rank · named in 8% of answers
ConvertKit firm ConvertKit — ci 0.08–0.23 · n=368 · 90.4% of resamples held this rank · named in 1% of answers
beehiiv gathering beehiiv — gathering data, n=368. No bootstrap interval yet.
Braze gathering Braze — gathering data, n=368. No bootstrap interval yet.
Active Campaign gathering Active Campaign — gathering data, n=368. 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.

Postmark

1.00–1.00

Klaviyo

0.92–0.92

Gmail

0.85–0.85

Mailchimp

0.69–0.77

Brevo

0.69–0.77

MailerLite

0.31–0.62

Yahoo Mail

0.31–0.62

Sender

0.31–0.62

HubSpot

0.31–0.62

Outlook

0.31–0.54

ConvertKit

0.08–0.23

11 of 14 brands measured · 19 dominance edges · 6 rungs · 11 pairs the data does not separate