Brandwave

Airmail vs Superhuman:Which is more popular?

In September 2026, Superhuman had more branded searches than Airmail among email clients worldwide. Superhuman had about 27,000 branded searches, while Airmail had 14,900. Superhuman made up 24% of all email client searches we track, and Airmail accounted for 13.2%. When we asked ChatGPT and Google AI Overviews about email clients, Superhuman appeared in three of the five answers and Airmail in none.

Among email clients worldwide in September 2026

Who do people search for more?

Superhuman, about 81% more searches than Airmail

Superhuman 27K searchesAirmail 14.9K searches

Who does AI mention more?

Superhuman, mentioned in 3 of 5 answers, Airmail in 0

Superhuman in 3 of 5Airmail in 0 of 5

Who does AI recommend more?

Superhuman, the only one of the two named

Superhuman first in 3Airmail never named

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Top email clients in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Superhuman was mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. Airmail did not appear in any of the five answers.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. Spark1st
  2. Thunderbird2nd
  3. Proton Mail3rd
  4. Superhuman4th
  5. Airmail–
  6. Newton–

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Spark4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Thunderbird4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Superhuman3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Proton Mail3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Airmail0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Newton0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about email clients

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 20, 2026.

Is Airmail or Superhuman more popular in search?

This chart shows how often people search Google for Airmail and Superhuman by name. Each line represents a brand's share of searches for all six email clients we track, month by month, from English-language searches worldwide.

Airmail and Superhuman among email clients worldwide, by month

Share of searches by month for Superhuman, Airmail. The figures are in the table below the chart.

View monthly share of searches table
MonthSparkThunderbirdSuperhumanAirmailNewtonProton Mail
Oct 202523.5%36.1%20.2%19.3%0.76%0.12%
Nov 202521.6%34.5%25.1%17.7%0.97%0.14%
Dec 202520.2%34%23.8%20.3%1.5%0.13%
Jan 202618.6%38.3%26.8%15.3%0.84%0.14%
Feb 202614.6%39%33.3%12%0.99%0.17%
Mar 202615.6%36.5%34.1%12.8%0.76%0.18%
Apr 202615.6%36.5%33.5%12.8%1.4%0.15%
May 202616.8%34.7%36.4%11.3%0.67%0.16%
Jun 202621.4%29.6%27.7%17.6%3.5%0.2%
Jul 202620.7%35%29.1%13.9%1.1%0.24%
Aug 202622%35.2%23.7%18.1%0.71%0.26%
Sep 202636%25.9%24%13.2%0.64%0.28%

How has the Airmail and Superhuman comparison changed over the last 12 months?

3 findings
  • Superhuman was ahead of Airmail in every measured month of the 12 months ending September 2026.
  • Across the 12 months ending September 2026, Airmail’s share of searches among email clients worldwide moved from 19.3% to 13.2%, and its estimated monthly branded searches moved from 22.3K to 14.9K.
  • Across the 12 months ending September 2026, Superhuman’s share of searches among email clients worldwide moved from 20.2% to 24%, and its estimated monthly branded searches moved from 23.4K to 27K.

How did search popularity change for email clients worldwide in September 2026?

3 changes

  1. In September 2026, Spark overtook Thunderbird and Superhuman to become the leader among email clients worldwide, with 36% of the searches.

  2. In September 2026, Airmail lost share of searches among email clients worldwide, from 18.1% to 13.2%.

  3. Estimated monthly branded searches for Superhuman worldwide rose 15.6% over 12 measured months, from 23.4K to 27K in September 2026.

How are branded searches counted?

7 search terms

Brandwave collects information about searches that people make online using Airmail’s and Superhuman’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

Airmail

3 branded search terms

  • airmail client
  • airmail email
  • airmail email client

Superhuman

4 branded search terms

  • superhuman ai
  • superhuman ai email assistant
  • superhuman email
  • superhuman email client

How the Brand Demand Index is measured

Other head-to-heads among email clients

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