Brandwave

How popular isThunderbird in search?

In August 2026, there were an estimated 823K branded searches for Thunderbird worldwide which is down 17.7% over the last 11 months. Thunderbird holds 84.5% estimated Share of Search among email clients worldwide and is ranked 1st of 5 competitors for search popularity. 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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Which email clients compete with Thunderbird?

Thunderbird against 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—————

  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 Thunderbird and its closest rivals

How has branded search demand for Thunderbird changed worldwide over the last 12 months?

  • Across the 11 months ending August 2026, estimated monthly branded searches for Thunderbird worldwide fell from 1M to 823K.
  • 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, 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.

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.

How is Thunderbird measured?

Brandwave collects information about searches that people make online using Thunderbird’s name. When viewed over time, estimated search volumes for this branded term can be used to understand whether interest in the brand is growing, holding steady, or fading.

1 branded search term

  • thunderbird

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How the Brand Demand Index is measured

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