Brandwave

How popular isMicrosoft Defender for Office 365?

In September 2026, people searched for Microsoft Defender for Office 365 by name about 2,400 times worldwide, a 55.6% decrease from the previous year. These searches made up 0.97% of all global email security platform searches, placing Microsoft Defender for Office 365 eighth out of eight platforms. When we asked both ChatGPT and Google AI Overviews about email security platforms, Microsoft Defender for Office 365 appeared in four of the five answers and was the second most recommended of the eight.

Search and AI answers in September 2026

Microsoft Defender for Office 365 is the eighth most searched of 8 competitors and the second most recommended in AI answers.

  1. MimecastShare of searches 44.3%Mentioned in 5 of 5 AI answersPlace in AI recommendations 4th
  2. ProofpointShare of searches 24.4%Mentioned in 5 of 5 AI answersPlace in AI recommendations 1st
  3. AvananShare of searches 13.3%Mentioned in 1 of 5 AI answersPlace in AI recommendations 7th
  4. BarracudaShare of searches 7.5%Mentioned in 4 of 5 AI answersPlace in AI recommendations 6th
  5. Microsoft Defender for Office 365Share of searches 0.97%Mentioned in 4 of 5 AI answersPlace in AI recommendations 2nd

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Top email security platforms in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Microsoft Defender for Office 365 was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Microsoft Defender for Office 365 is the second most recommended of the eight.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. Proofpoint1st
  2. Microsoft Defender for Office 3652nd
  3. Abnormal Security3rd
  4. Mimecast4th
  5. Check Point5th
  6. Barracuda6th
  7. Avanan7th
  8. IRONSCALES8th

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Mimecast5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Proofpoint5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Barracuda4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Microsoft Defender for Office 3654 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Check Point3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Abnormal Security3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Avanan1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • IRONSCALES1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about email security platforms

5 answers

Brands are shown in the order each answer named them. The survey took place in the United States on October 20, 2026.

Which email security platforms compete with Microsoft Defender for Office 365?

Microsoft Defender for Office 365 against email security platforms worldwide, by month

Share of searches by month for Mimecast, Proofpoint, Avanan, Barracuda, Check Point, Microsoft Defender for Office 365. The figures are in the table below the chart.

View monthly share of searches table
MonthMimecastProofpointAvananBarracudaCheck PointAbnormal SecurityIRONSCALESMicrosoft Defender for Office 365
Oct 202543.2%23.8%13%7.3%5.3%3.2%2.1%2.1%
Nov 202539.9%26.6%14.6%6.7%5.5%2.4%1.9%2.4%
Dec 202542.6%23.3%15.6%7.1%5.6%2.1%2.1%1.7%
Jan 202642.2%23.2%15.5%7%6.2%2.5%1.7%1.7%
Feb 202639.5%26.4%14.4%6.9%6.4%2.4%2.4%1.6%
Mar 202640.9%27.5%12.3%6.8%6%2.5%2%2%
Apr 202638.8%25.9%14.2%7.8%6.3%2.3%2.3%2.3%
May 202639.6%26.5%14.5%7.9%5.8%1.9%1.9%1.9%
Jun 202644.2%24.3%13.3%7.3%5.9%1.8%1.8%1.4%
Jul 202641.1%22.5%15%9.7%6%2%2%1.6%
Aug 202639.9%26.7%14.6%7.9%5.8%1.9%1.9%1.3%
Sep 202644.3%24.4%13.3%7.5%5.9%1.8%1.8%0.97%

  1. 1.Mimecast

    44.3%

    Held 1st. 110K estimated branded searches, +21.5% vs prior month. Share +4.5 points.

  2. 2.Proofpoint

    24.4%

    Held 2nd. 60.5K estimated branded searches, 0% vs prior month. Share -2.3 points.

  3. 3.Avanan

    13.3%

    Held 3rd. 33.1K estimated branded searches, 0% vs prior month. Share -1.2 points.

  4. 4.Barracuda

    7.5%

    Held 4th. 18.6K estimated branded searches, +3.2% vs prior month. Share -0.4 points.

  5. 5.Check Point

    5.9%

    Held 5th. 14.7K estimated branded searches, +11.4% vs prior month. Share +0.1 points.

  6. 6.Abnormal Security

    1.8%

    Held 6th. 4.4K estimated branded searches, 0% vs prior month. Share -0.2 points.

  7. 7.IRONSCALES

    1.8%

    Held 7th. 4.4K estimated branded searches, 0% vs prior month. Share -0.2 points.

  8. 8.Microsoft Defender for Office 365

    0.97%

    Held 8th. 2.4K estimated branded searches, -17.2% vs prior month. Share -0.3 points.

Compare popularity between Microsoft Defender for Office 365 and its closest rivals

Every comparison with Microsoft Defender for Office 365

7 comparisons

How has branded search demand for Microsoft Defender for Office 365 changed worldwide over the last 12 months?

3 findings
  • Across the 12 months ending September 2026, estimated monthly branded searches for Microsoft Defender for Office 365 worldwide fell from 5.4K to 2.4K.
  • Across the 12 months ending September 2026, Microsoft Defender for Office 365’s share of searches among email security platforms worldwide decreased from 2.1% to 0.97%.
  • Across the 12 months ending September 2026, Microsoft Defender for Office 365’s share of searches among email security platforms worldwide peaked at 2.4% in November 2025 and was lowest at 0.97% in September 2026.

How did search popularity change for email security platforms worldwide in September 2026?

6 changes

  1. In September 2026, Mimecast gained share of searches among email security platforms worldwide, from 39.9% to 44.3%.

  2. In September 2026, Proofpoint lost share of searches among email security platforms worldwide, from 26.7% to 24.4%.

  3. In September 2026, Avanan lost share of searches among email security platforms worldwide, from 14.6% to 13.3%.

  4. Estimated monthly branded searches for Microsoft Defender for Office 365 worldwide fell 55.6% over 12 measured months, from 5.4K to 2.4K in September 2026.

  5. Estimated monthly branded searches for Abnormal Security worldwide fell 45.7% over 12 measured months, from 8.1K to 4.4K in September 2026.

  6. Estimated monthly branded searches for IRONSCALES worldwide fell 18.5% over 12 measured months, from 5.4K to 4.4K in September 2026.

How are Microsoft Defender for Office 365’s branded searches counted?

1 search term

Brandwave collects information about searches that people make online using Microsoft Defender for Office 365’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 defender for office 365

How the Brand Demand Index is measured

Who owns Microsoft Defender for Office 365?

Microsoft Defender for Office 365 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 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 Outlook, 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.

Do you work for Microsoft Defender for Office 365? To request corrections or removal please contact us via our support page and we will be happy to assist.

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