--- title: "Microsoft 365 vs Proton Mail: Which is more popular by branded search?" description: "Which is more popular in search, Microsoft 365 or Proton Mail? Compare estimated monthly branded-search demand and Share of Search inside the Business email providers set worldwide. 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." canonical: "https://gobrandwave.com/demand/global-en/compare/microsoft-365-vs-proton-mail" publisher: "Brandwave" --- # Microsoft 365 vs Proton Mail: Which is more popular by branded search? Which is more popular in search, Microsoft 365 or Proton Mail? Compare estimated monthly branded-search demand and Share of Search inside the Business email providers set worldwide. 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. ## Key facts - **Compared**: Microsoft 365 and Proton Mail - **Competitive set**: Business email providers - **Market**: Global - **Month measured**: Aug 2026 - **Microsoft 365 Share of Search**: 60.3% - **Proton Mail Share of Search**: 18.1% ## Which is more popular in search, Microsoft 365 or Proton Mail? - In August 2026, Microsoft 365 had more branded searches than Proton Mail among business email providers worldwide. Microsoft 365 was estimated to have 13.7M branded searches compared to Proton Mail’s 4.1M, and held a 60.3% Share of Search versus Proton Mail’s 18.1%. - Microsoft 365 was ahead of Proton Mail in every measured month of the 11 months ending August 2026. - Across the 11 months ending August 2026, Microsoft 365’s estimated Share of Search among business email providers worldwide moved from 75.2% to 60.3%, and its estimated monthly branded searches moved from 26M to 13.7M. - Across the 11 months ending August 2026, Proton Mail’s estimated Share of Search among business email providers worldwide moved from 9.7% to 18.1%, and its estimated monthly branded searches moved from 3.4M to 4.1M. ## How did search popularity change for business email providers worldwide in August 2026? - In August 2026, Microsoft 365 gained estimated Share of Search among business email providers worldwide, from 58.2% to 60.3%. - In August 2026, Proton Mail lost estimated Share of Search among business email providers worldwide, from 19% to 18.1%. ## Month by month | Month | Microsoft 365 estimated searches | Microsoft 365 Share of Search | Microsoft 365 rank | Proton Mail estimated searches | Proton Mail Share of Search | Proton Mail rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 26M | 75.2% | 1 | 3.4M | 9.7% | 3 | | Nov 2025 | 22.8M | 75.4% | 1 | 3.4M | 11.1% | 2 | | Dec 2025 | 18.6M | 71.5% | 1 | 3.4M | 12.9% | 2 | | Jan 2026 | 21.1M | 71.3% | 1 | 4.1M | 13.8% | 2 | | Feb 2026 | 21.1M | 73.2% | 1 | 3.4M | 11.6% | 2 | | Mar 2026 | 21.2M | 71.2% | 1 | 4.1M | 13.8% | 2 | | Apr 2026 | 18.6M | 67.3% | 1 | 4.1M | 14.8% | 2 | | May 2026 | 18.7M | 68.6% | 1 | 4.1M | 15.1% | 2 | | Jun 2026 | 15.3M | 63% | 1 | 4.1M | 16.8% | 2 | | Jul 2026 | 12.5M | 58.2% | 1 | 4.1M | 19% | 2 | | Aug 2026 | 13.7M | 60.3% | 1 | 4.1M | 18.1% | 2 | | Sep 2026 | — | — | — | — | — | — | ## How each brand is measured Brandwave collects information about searches that people make online using Microsoft 365’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. - **Microsoft 365**: Measured on the search terms “business email microsoft 365”, “email microsoft 365”, “microsoft 365”, “microsoft 365 app”, “microsoft 365 business email”, “microsoft 365 email”, “microsoft 365 software”, “microsoft365” and “office 365”, summed into one figure. - **Proton Mail**: Measured on the search terms “email proton mail”, “proton mail”, “proton mail app”, “proton mail business email”, “proton mail email”, “proton mail software” and “protonmail”, summed into one figure. - [Microsoft 365 profile](/demand/global-en/brands/microsoft-365) - [Proton Mail profile](/demand/global-en/brands/proton-mail) - [All business email providers worldwide](/demand/global-en/categories/business-email-providers): The set both shares are measured inside, 5 brands. ## Methodology - [How is branded search demand measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused. ## Frequently asked questions ### Which is more popular in search, Microsoft 365 or Proton Mail? In August 2026, Microsoft 365 had more branded searches than Proton Mail among business email providers worldwide. Microsoft 365 was estimated to have 13.7M branded searches compared to Proton Mail’s 4.1M, and held a 60.3% Share of Search versus Proton Mail’s 18.1%. ## Cite this page Brandwave. "Microsoft 365 vs Proton Mail: Which is more popular by branded search?". https://gobrandwave.com/demand/global-en/compare/microsoft-365-vs-proton-mail This page is also available as HTML at https://gobrandwave.com/demand/global-en/compare/microsoft-365-vs-proton-mail. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.