Proton Mail vs Spark:Which is searched more?
In September 2026, Spark had more branded searches than Proton Mail among email clients worldwide. Spark had about 40,500 branded searches, while Proton Mail had 320. Spark made up 36% of all email client searches we track, and Proton Mail accounted for 0.28%. These are worldwide searches for English-language branded terms.
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Is Proton Mail or Spark more popular in search?
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 searches by month for Spark, Proton Mail. The figures are in the table below the chart.
View monthly share of searches table
| Month | Spark | Thunderbird | Superhuman | Airmail | Newton | Proton Mail |
|---|---|---|---|---|---|---|
| Oct 2025 | 23.5% | 36.1% | 20.2% | 19.3% | 0.76% | 0.12% |
| Nov 2025 | 21.6% | 34.5% | 25.1% | 17.7% | 0.97% | 0.14% |
| Dec 2025 | 20.2% | 34% | 23.8% | 20.3% | 1.5% | 0.13% |
| Jan 2026 | 18.6% | 38.3% | 26.8% | 15.3% | 0.84% | 0.14% |
| Feb 2026 | 14.6% | 39% | 33.3% | 12% | 0.99% | 0.17% |
| Mar 2026 | 15.6% | 36.5% | 34.1% | 12.8% | 0.76% | 0.18% |
| Apr 2026 | 15.6% | 36.5% | 33.5% | 12.8% | 1.4% | 0.15% |
| May 2026 | 16.8% | 34.7% | 36.4% | 11.3% | 0.67% | 0.16% |
| Jun 2026 | 21.4% | 29.6% | 27.7% | 17.6% | 3.5% | 0.2% |
| Jul 2026 | 20.7% | 35% | 29.1% | 13.9% | 1.1% | 0.24% |
| Aug 2026 | 22% | 35.2% | 23.7% | 18.1% | 0.71% | 0.26% |
| Sep 2026 | 36% | 25.9% | 24% | 13.2% | 0.64% | 0.28% |
How has the Proton Mail and Spark comparison changed over the last 12 months?
3 findings
- Spark was ahead of Proton Mail in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Proton Mail’s share of searches among email clients worldwide moved from 0.12% to 0.28%, and its estimated monthly branded searches moved from 140 to 320.
- Across the 12 months ending September 2026, Spark’s share of searches among email clients worldwide moved from 23.5% to 36%, and its estimated monthly branded searches moved from 27.1K to 40.5K.
How did search popularity change for email clients worldwide in September 2026?
2 changes
In September 2026, Spark overtook Thunderbird and Superhuman to become the leader among email clients worldwide, with 36% of the searches.
Estimated monthly branded searches for Proton Mail worldwide rose 128.6% over 12 measured months, from 140 to 320 in September 2026.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Proton Mail’s and Spark’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.
Proton Mail
1 branded search term
- email proton mail
Spark
1 branded search term
- spark email
Other head-to-heads among email clients
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