Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · User Threat Prevention Software

Abnormal Security vs Microsoft Defender for Business

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Abnormal Security #4 in User Threat Prevention Software 8.6/10 Pricing on request ✓ 3 of 5 features Visit site
Microsoft Defender for Business #6 in User Threat Prevention Software 7.9/10 30-day trial Free trial✓ 0 of 5 features Visit Microsoft

Abnormal Security leads on 0 checks, Microsoft Defender for Business on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAbnormal Security · 8.6/10
  • Free trialonly Microsoft Defender for Business
  • Most featuresAbnormal Security · 3 of 5

Abnormal Security scores higher on our rubric for user threat prevention software: 8.6 against 7.9 out of 10; our editors rank them #4 and #6.

Abnormal Security is the better fit for mid-market and enterprise email threat teams. Microsoft Defender for Business is the better fit for small businesses seeking endpoint protection.

  • Abnormal Security fits best

    Mid-market and enterprise email threat teams

  • Microsoft Defender for Business fits best

    Small businesses seeking endpoint protection

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Abnormal Security 8.6/10 Visit ↗ Microsoft Defender for Business 7.9/10 Visit ↗
At a glance
Editor score 8.6 7.9
Ranking #4 in User Threat Prevention Software #6 in User Threat Prevention Software
Best for Mid-market and enterprise email threat teams Small businesses seeking endpoint protection
Pricing model Paid Paid
Starting price Pricing on request $3/user/mo
Free plan — —
Free trial — 30 days
Deployment Cloud Cloud, Mobile
Platforms Web Web, Windows, macOS, iOS, Android
Support Email, Phone, Tickets, Docs Docs
Integrations 14 integrations 4 integrations
Built for Mid-market, Enterprise Small business, Mid-market
Features Abnormal Security 3/5 · Microsoft Defender for Business 0/5
Phishing simulations ✓ (best) Not checked yet
Browser isolation Not checked yet Not checked yet
Attachment sandboxing Not checked yet Not checked yet
User report button ✓ (best) Not checked yet
Automated remediation ✓ (best) Not checked yet
Specs
Protected channels Multi_surface Not checked yet
Our review
Pros
  • Detects phishing, BEC, and account takeover using email and identity signals
  • Automates malicious-email remediation and reported-message triage
  • Extends messaging security to Slack, Teams, and Zoom
  • Combines antivirus, EDR, and ransomware attack disruption.
  • Automates investigation and remediation of detected issues.
  • Covers Windows, macOS, iOS, and Android devices.
Cons
  • No free plan; pricing is quote-based
  • Cloud deployment only
  • Focused on organizational email, identity, and collaboration security
  • The $3 per-user monthly price requires annual billing.
  • The 30-day trial requires a payment card.
  • Its focus is device security, not broader user-threat channels.
Our verdict

Email threats rarely stay confined to an inbox. Abnormal Security is a cloud-based behavioral security platform for organizations seeking protection against phishing, business email compromise, vendor fraud, and account takeover across…

Read the review →

Microsoft Defender for Business provides endpoint security for small and medium-sized businesses, with support for up to 300 users and five devices per user. Its protection spans Windows, macOS, iOS, and Android, making it a fit for…

Read the review →
  1. Abnormal SecurityUser Threat Prevention Software 8.6Pricing on request
  2. Microsoft Defender for BusinessUser Threat Prevention Software 7.930-day trial

Strengths and trade-offs

  • Abnormal Security — where it wins

    • Detects phishing, BEC, and account takeover using email and identity signals
    • Automates malicious-email remediation and reported-message triage
    • Extends messaging security to Slack, Teams, and Zoom

    Where it doesn't

    • No free plan; pricing is quote-based
    • Cloud deployment only
    • Focused on organizational email, identity, and collaboration security

  • Microsoft Defender for Business — where it wins

    • Combines antivirus, EDR, and ransomware attack disruption.
    • Automates investigation and remediation of detected issues.
    • Covers Windows, macOS, iOS, and Android devices.

    Where it doesn't

    • The $3 per-user monthly price requires annual billing.
    • The 30-day trial requires a payment card.
    • Its focus is device security, not broader user-threat channels.
  • Abnormal Security8.6/10 · Pricing on request

    Behavioral threat detection and automated response for email and identity teams.

    Visit siteFull verdict →
  • Microsoft Defender for Business7.9/10 · 30-day trial

    Affordable endpoint protection with EDR and ransomware response, billed annually.

    Visit MicrosoftFull verdict →

More comparisons

All user threat prevention software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update