--- title: "Microsoft Outlook: search popularity worldwide" description: "Microsoft Outlook is Microsoft's email and calendar app. 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/brands/microsoft-outlook" publisher: "Brandwave" --- # Microsoft Outlook: search popularity worldwide Microsoft Outlook is Microsoft's email and calendar app. 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 - **Brand**: Microsoft Outlook - **Owned by**: Microsoft - **Market**: Global - **Measured month**: Sep 2026 - **Share of Search among email clients**: 83.1% ## Where the brand sits | Competitive set | Rank | Share of Search | Estimated monthly branded searches | | --- | --- | --- | --- | | Email clients | 1 | 83.1% | 1.2M | - [Email clients](/demand/global-en/categories/email-clients) ## Top email clients in ChatGPT and Google AI Overviews In three ChatGPT questions and two Google AI Overviews, Microsoft Outlook appeared in all five answers. Microsoft Outlook is the most recommended of the eight. Brands get a higher AI rank if they are mentioned earlier in the answers that list options. | Brand | AI rank | ChatGPT answers that named it | Google AI Overviews that named it | All answers that named it | | --- | --- | --- | --- | --- | | Microsoft Outlook | 1st | 3 of 3 | 2 of 2 | 5 of 5 | | Apple Mail | 2nd | 3 of 3 | 2 of 2 | 5 of 5 | | Thunderbird | 3rd | 3 of 3 | 1 of 2 | 4 of 5 | | Spark | 4th | 2 of 3 | 2 of 2 | 4 of 5 | | Proton Mail | 5th | 2 of 3 | 1 of 2 | 3 of 5 | | Superhuman | 6th | 2 of 3 | 1 of 2 | 3 of 5 | | Airmail | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | | Newton | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | ## Every AI answer about email clients - Asked ChatGPT "Which email client should I use?": 1. Microsoft Outlook, 2. Apple Mail, 3. Proton Mail, 4. Thunderbird - Asked ChatGPT "What are the best email clients?": 1. Microsoft Outlook, 2. Thunderbird, 3. Apple Mail, 4. Spark, 5. Proton Mail, 6. Superhuman - Asked ChatGPT "What's the best email client for daily email management?": 1. Spark, 2. Microsoft Outlook, 3. Thunderbird, 4. Apple Mail, 5. Superhuman - Searched Google, AI Overview "email client": 1. Thunderbird, 2. Microsoft Outlook, 3. Spark, 4. Apple Mail - Searched Google, AI Overview "best email app": 1. Microsoft Outlook, 2. Apple Mail, 3. Spark, 4. Proton Mail, 5. Superhuman Not named in any answer: Airmail and Newton. Brands are listed in the order each answer named them. The answers were collected in the United States on October 20, 2026. ## How has branded search demand for Microsoft Outlook changed worldwide over the last 12 months? - Across the 12 months ending September 2026, estimated monthly branded searches for Microsoft Outlook worldwide fell from 1.8M to 1.2M. - Across the 12 months ending September 2026, Microsoft Outlook’s share of searches among email clients worldwide decreased from 86.7% to 83.1%. - Across the 12 months ending September 2026, Microsoft Outlook’s share of searches among email clients worldwide peaked at 86.7% in October 2025 and was lowest at 81.6% in December 2025. ## How did search popularity change for email clients worldwide in September 2026? - In September 2026, Spark overtook Thunderbird and Superhuman to rank 3rd among email clients worldwide, with 2.8% of the searches. - In September 2026, Microsoft Outlook lost share of searches among email clients worldwide, from 83.8% to 83.1%. - Estimated monthly branded searches for Proton Mail worldwide rose 128.6% over 12 measured months, from 140 to 320 in September 2026. - Estimated monthly branded searches for Superhuman worldwide rose 15.6% over 12 measured months, from 23.4K to 27K in September 2026. - Estimated monthly branded searches for Airmail worldwide fell 33.2% over 12 measured months, from 22.3K to 14.9K in September 2026. - Estimated monthly branded searches for Thunderbird worldwide fell 30% over 12 measured months, from 41.6K to 29.1K in September 2026. ## Historical estimated branded-search demand | Month | Competitive set | Estimated monthly branded searches | Share of Search | Rank | | --- | --- | --- | --- | --- | | Oct 2025 | Email clients | 1.8M | 86.7% | 1 | | Nov 2025 | Email clients | 1.5M | 84.8% | 1 | | Dec 2025 | Email clients | 1.2M | 81.6% | 1 | | Jan 2026 | Email clients | 1.5M | 84.1% | 1 | | Feb 2026 | Email clients | 1.5M | 86.4% | 1 | | Mar 2026 | Email clients | 1.5M | 85.7% | 1 | | Apr 2026 | Email clients | 1.2M | 84.4% | 1 | | May 2026 | Email clients | 1.2M | 84.9% | 1 | | Jun 2026 | Email clients | 1.2M | 85.1% | 1 | | Jul 2026 | Email clients | 1M | 83.5% | 1 | | Aug 2026 | Email clients | 1.2M | 83.8% | 1 | | Sep 2026 | Email clients | 1.2M | 83.1% | 1 | ## How are Microsoft Outlook’s branded searches counted? Brandwave collects information about searches that people make online using Microsoft Outlook’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. - “microsoft outlook” ## Which email clients compete with Microsoft Outlook? - [Apple Mail](/demand/global-en/brands/apple-mail): Head-to-head: /demand/global-en/compare/apple-mail-vs-microsoft-outlook - [Spark](/demand/global-en/brands/spark-email): Head-to-head: /demand/global-en/compare/microsoft-outlook-vs-spark-email - [Thunderbird](/demand/global-en/brands/thunderbird): Head-to-head: /demand/global-en/compare/microsoft-outlook-vs-thunderbird - [Superhuman](/demand/global-en/brands/superhuman): Head-to-head: /demand/global-en/compare/microsoft-outlook-vs-superhuman - [Airmail](/demand/global-en/brands/airmail): Head-to-head: /demand/global-en/compare/airmail-vs-microsoft-outlook - [Newton](/demand/global-en/brands/newton-mail) - [Proton Mail](/demand/global-en/brands/proton-mail) ## Who owns Microsoft Outlook? Microsoft Outlook is owned by Microsoft. Brandwave also tracks Microsoft Copilot, Azure AI Document Intelligence, Azure AI Search, Azure Bicep, Azure Blob Storage, Azure Container Apps, Azure Container Registry, Azure Cosmos DB, Azure Data Factory, Azure DevOps, Azure Machine Learning, Azure Pipelines, Azure Service Bus, Azure Stream Analytics, Bing, Clipchamp, GitHub Actions, GitHub Copilot, LinkedIn, LinkedIn Ads, LinkedIn Recruiter, LinkedIn Sales Navigator, Microsoft 365, Microsoft Advertising, Microsoft Authenticator, Microsoft Azure, Microsoft Bookings, Microsoft Clarity, Microsoft Defender for Cloud, Microsoft Defender for Office 365, Microsoft Defender Vulnerability Management, Microsoft Designer, Microsoft Dynamics 365, Microsoft Dynamics 365 Business Central, Microsoft Dynamics 365 Supply Chain Management, Microsoft Edge, Microsoft Entra, Microsoft Forms, Microsoft Learn, Microsoft OneNote, Microsoft Places, Microsoft Planner, Microsoft Power Automate Process Mining, Microsoft Power BI, Microsoft PowerPoint, Microsoft Purview, Microsoft Surface, Microsoft Teams, Microsoft To Do, Microsoft Translator, Microsoft Visio, Microsoft Whiteboard, Minecraft, OneDrive, OneNote, Outlook, Power Automate, SharePoint, Xbox and Xbox Game Pass, owned by the same company, worldwide. - [Microsoft](/demand/global-en/companies/microsoft): Owns 69 tracked brands. ## Methodology - [How is the Brand Demand Index measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused. ## Frequently asked questions ### Who owns Microsoft Outlook? Microsoft Outlook is owned by Microsoft. Brandwave also tracks Microsoft Copilot, Azure AI Document Intelligence, Azure AI Search, Azure Bicep, Azure Blob Storage, Azure Container Apps, Azure Container Registry, Azure Cosmos DB, Azure Data Factory, Azure DevOps, Azure Machine Learning, Azure Pipelines, Azure Service Bus, Azure Stream Analytics, Bing, Clipchamp, GitHub Actions, GitHub Copilot, LinkedIn, LinkedIn Ads, LinkedIn Recruiter, LinkedIn Sales Navigator, Microsoft 365, Microsoft Advertising, Microsoft Authenticator, Microsoft Azure, Microsoft Bookings, Microsoft Clarity, Microsoft Defender for Cloud, Microsoft Defender for Office 365, Microsoft Defender Vulnerability Management, Microsoft Designer, Microsoft Dynamics 365, Microsoft Dynamics 365 Business Central, Microsoft Dynamics 365 Supply Chain Management, Microsoft Edge, Microsoft Entra, Microsoft Forms, Microsoft Learn, Microsoft OneNote, Microsoft Places, Microsoft Planner, Microsoft Power Automate Process Mining, Microsoft Power BI, Microsoft PowerPoint, Microsoft Purview, Microsoft Surface, Microsoft Teams, Microsoft To Do, Microsoft Translator, Microsoft Visio, Microsoft Whiteboard, Minecraft, OneDrive, OneNote, Outlook, Power Automate, SharePoint, Xbox and Xbox Game Pass, owned by the same company, worldwide. ## Cite this page Brandwave. "Microsoft Outlook: search popularity worldwide". https://gobrandwave.com/demand/global-en/brands/microsoft-outlook This page is also available as HTML at https://gobrandwave.com/demand/global-en/brands/microsoft-outlook. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.