Outlook vs Proton Mail:Which is searched more?
In September 2026, Outlook had more branded searches than Proton Mail among email providers worldwide. Outlook was estimated to have 155M branded searches compared to Proton Mail’s 4.1M, and held a 23.5% Share of Search versus Proton Mail’s 0.62%. These are worldwide searches for English-language branded terms.
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Which is more popular in search, Outlook or Proton Mail?
Compare the email providers people choose between. 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 by month for Outlook, Proton Mail. The figures are in the table below the chart.
View monthly share of search table
| Month | Gmail | Outlook | Yahoo Mail | Proton Mail | Zoho Mail |
|---|---|---|---|---|---|
| Oct 2025 | 61.2% | 22.8% | 14.9% | 0.5% | 0.5% |
| Nov 2025 | 56.4% | 25.8% | 16.9% | 0.56% | 0.37% |
| Dec 2025 | 56.4% | 25.8% | 16.9% | 0.56% | 0.37% |
| Jan 2026 | 56.3% | 25.8% | 16.8% | 0.68% | 0.37% |
| Feb 2026 | 59.7% | 24.6% | 14.7% | 0.59% | 0.4% |
| Mar 2026 | 61.2% | 22.9% | 14.9% | 0.61% | 0.33% |
| Apr 2026 | 61.1% | 22.9% | 14.9% | 0.61% | 0.41% |
| May 2026 | 56.3% | 25.8% | 16.8% | 0.68% | 0.37% |
| Jun 2026 | 57.7% | 23.9% | 17.2% | 0.7% | 0.47% |
| Jul 2026 | 60.8% | 23% | 15% | 0.74% | 0.49% |
| Aug 2026 | 59.5% | 24.7% | 14.6% | 0.72% | 0.48% |
| Sep 2026 | 62.8% | 23.5% | 12.6% | 0.62% | 0.42% |
How has the Outlook and Proton Mail comparison changed over the last 12 months?
3 findings
- Outlook was ahead of Proton Mail in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Outlook’s estimated Share of Search among email providers worldwide moved from 22.8% to 23.5%, and its estimated monthly branded searches moved from 154M to 155M.
- Across the 12 months ending September 2026, Proton Mail’s estimated Share of Search among email providers worldwide moved from 0.5% to 0.62%, and its estimated monthly branded searches moved from 3.4M to 4.1M.
How did search popularity change for email providers worldwide in September 2026?
2 changes
In September 2026, Outlook lost estimated Share of Search among email providers worldwide, from 24.7% to 23.5%.
Estimated monthly branded searches for Proton Mail worldwide rose 22% over 12 measured months, from 3.4M to 4.1M in September 2026.
Other head-to-heads among email providers
How each brand is measured
Brandwave collects information about searches that people make online using Outlook’s and Proton Mail’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.
Outlook
3 branded search terms
- hotmail
- outlook
- outlook email
Proton Mail
6 branded search terms
- email proton mail
- proton mail
- proton mail app
- proton mail email
- proton mail software
- protonmail
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