Brandwave

Email clients:Which brands are most popular in search?

In August 2026, Thunderbird was the most searched among email clients worldwide, with an estimated 823K branded searches and 84.5% estimated Share of Search within this set. These are worldwide searches for English-language branded terms.

Share of Search, August 2026
  1. Thunderbird84.5%
  2. Superhuman11.3%
  3. Spark2.3%
  4. Airmail1.9%
  5. Newton0.07%

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Share of SearchLeaderboard

Compare the apps people manage email in. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time.

Share of Search among email clients worldwide, by month

Share of Search by month for Thunderbird, Superhuman, Spark. The figures are in the table below the chart.

View monthly share of search table
MonthThunderbirdSuperhumanSparkAirmailNewton
Oct 202587.7%7.9%2.4%1.9%0.08%
Nov 202584.5%11.3%2.3%1.9%0.1%
Dec 202585.8%9.4%2.3%2.3%0.17%
Jan 202684.5%11.3%2.3%1.9%0.1%
Feb 202687.4%9.6%1.6%1.3%0.11%
Mar 202685.1%11.4%1.9%1.5%0.09%
Apr 202686.8%9.5%1.9%1.6%0.17%
May 202688.7%8%2%1.3%0.08%
Jun 202686%9.5%2.3%1.9%0.38%
Jul 202686.5%9.5%2.3%1.6%0.13%
Aug 202684.5%11.3%2.3%1.9%0.07%
Sep 2026—————

This month’s ranking, August 2026

  1. 1.Thunderbird

    84.5%

    Held 1st. 823K estimated branded searches, +22.3% vs prior month. Share -2 points.

  2. 2.Superhuman

    11.3%

    Held 2nd. 110K estimated branded searches, +48.6% vs prior month. Share +1.8 points.

  3. 3.Spark

    2.3%

    Held 3rd. 22.2K estimated branded searches, +22.7% vs prior month. Share 0 points.

  4. 4.Airmail

    1.9%

    Held 4th. 18.1K estimated branded searches, +49.6% vs prior month. Share +0.3 points.

  5. 5.Newton

    0.07%

    Held 5th. 720 estimated branded searches, -28% vs prior month. Share -0.1 points.

Compare search popularity between leading brands

Which brand is most popular in search among email clients worldwide?

In August 2026, Thunderbird was the most searched among email clients worldwide, with an estimated 823K branded searches and 84.5% estimated Share of Search within this set. Superhuman is in 2nd place, 73.2 percentage points behind at 11.3% Share of Search.

Global email clients, last 12 months ending September 2026
BrandShare of SearchPeakLowRank
Thunderbird87.7% → 84.5%88.7%May 202684.5%Nov 20251st
Superhuman7.9% → 11.3%11.4%Mar 20267.9%Oct 20252nd
Spark2.4% → 2.3%2.4%Oct 20251.6%Feb 20263rd
Airmail1.9%2.3%Dec 20251.3%Feb 20264th
Newton0.08% → 0.07%0.38%Jun 20260.07%Aug 20265th

Each finding as a sentence

  • Across the 11 months ending August 2026, Thunderbird’s estimated Share of Search among email clients worldwide decreased from 87.7% to 84.5%.
  • Across the 11 months ending August 2026, Superhuman’s estimated Share of Search among email clients worldwide increased from 7.9% to 11.3%.
  • Across the 11 months ending August 2026, Thunderbird’s estimated Share of Search among email clients worldwide peaked at 88.7% in May 2026 and was lowest at 84.5% in November 2025.
  • Across the 11 months ending August 2026, Superhuman’s estimated Share of Search among email clients worldwide peaked at 11.4% in March 2026 and was lowest at 7.9% in October 2025.
  • Across the 11 months ending August 2026, Airmail’s estimated Share of Search among email clients worldwide peaked at 2.3% in December 2025 and was lowest at 1.3% in February 2026.
  • Across the 11 months ending August 2026, Spark, Airmail and Newton held steady: their estimated Share of Search among email clients worldwide each moved less than 0.5 percentage points.

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

  1. In August 2026, Superhuman gained estimated Share of Search among email clients worldwide, from 9.5% to 11.3%.

  2. In August 2026, Thunderbird lost estimated Share of Search among email clients worldwide, from 86.5% to 84.5%.

  3. Estimated monthly branded searches for Airmail worldwide fell 18.5% over 11 measured months, from 22.2K to 18.1K in August 2026.

  4. Estimated monthly branded searches for Newton worldwide fell 18.2% over 11 measured months, from 880 to 720 in August 2026.

  5. Estimated monthly branded searches for Spark worldwide fell 18.1% over 11 measured months, from 27.1K to 22.2K in August 2026.

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