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Head-to-head · Antivirus Software

Microsoft Defender for Business vs FortiClient

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Microsoft Defender for Business #1 in Antivirus Software 9.4/10 30-day trial Free trial✓ 1 of 3 features Visit Microsoft
FortiClient #5 in Antivirus Software 8.9/10 Pricing on request ✓ 1 of 3 features Visit Fortinet

Microsoft Defender for Business leads on 0 checks, FortiClient 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 scoreMicrosoft Defender for Business · 9.4/10
  • Free trialonly Microsoft Defender for Business

Microsoft Defender for Business scores higher on our rubric for antivirus software: 9.4 against 8.9 out of 10; our editors rank them #1 and #5.

Microsoft Defender for Business is the better fit for small businesses needing managed endpoint security. FortiClient is the better fit for enterprise teams using Fortinet infrastructure.

  • Microsoft Defender for Business fits best

    Small businesses needing managed endpoint security

  • FortiClient fits best

    Enterprise teams using Fortinet infrastructure

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Side by side

Feature Microsoft Defender for Business 9.4/10 Visit ↗ FortiClient 8.9/10 Visit ↗
At a glance
Editor score 9.4 8.9
Ranking #1 in Antivirus Software #5 in Antivirus Software
Best for Small businesses needing managed endpoint security Enterprise teams using Fortinet infrastructure
Pricing model Paid Paid
Starting price $3/user/mo Pricing on request
Free plan — —
Free trial 30 days —
Deployment Cloud, Mobile Cloud, Self-hosted
Platforms Web, Windows, macOS, iOS, Android Windows, macOS, Linux, iOS, Android
Support Docs Email, Community · 24/7
Integrations 4 integrations 5 integrations
Built for Small business, Mid-market Small business, Mid-market, Enterprise
Features Microsoft Defender for Business 1/3 · FortiClient 1/3
Ransomware protection ✓ ✓
Parental controls Not checked yet —
Password manager Not checked yet —
Specs
Protection scope Complete security Complete security
Device limit 5 devices Not checked yet
Supported platforms Windows, macOS, iOS, Android Windows, macOS, Linux, iOS, Android
Our review
Pros
  • EDR includes automatic attack disruption and automated remediation
  • Protects Windows, macOS, iOS, and Android devices
  • Includes vulnerability management, APIs, SIEM, and RMM integrations
  • Combines antivirus, ransomware protection, VPN, and zero-trust access
  • Supports Windows, macOS, Linux, iOS, Android, and Chromebook
  • Integrates with FortiGate, FortiSandbox, FortiSIEM, and Security Fabric
Cons
  • The listed price requires annual billing
  • Coverage is limited to 300 users and five devices per user
  • Server protection is available only as an add-on
  • Pricing requires a sales conversation rather than public plan rates
  • Editions and licenses change included features and device limits
  • Its strongest fit depends on an existing Fortinet security environment
Our verdict

Microsoft Defender for Business is an endpoint security solution for small and medium-sized organizations with up to 300 users. It combines next-generation antivirus with ransomware attack disruption, vulnerability management, attack…

Read the review →

FortiClient is Fortinet endpoint software for organizations that need protection, secure access, and centralized device controls across a mixed environment. Its security coverage includes antivirus and AI-powered next-generation antivirus,…

Read the review →
  1. Microsoft Defender for BusinessAntivirus Software 9.430-day trial
  2. FortiClientAntivirus Software 8.9Pricing on request

Strengths and trade-offs

  • Microsoft Defender for Business — where it wins

    • EDR includes automatic attack disruption and automated remediation
    • Protects Windows, macOS, iOS, and Android devices
    • Includes vulnerability management, APIs, SIEM, and RMM integrations

    Where it doesn't

    • The listed price requires annual billing
    • Coverage is limited to 300 users and five devices per user
    • Server protection is available only as an add-on
  • FortiClient — where it wins

    • Combines antivirus, ransomware protection, VPN, and zero-trust access
    • Supports Windows, macOS, Linux, iOS, Android, and Chromebook
    • Integrates with FortiGate, FortiSandbox, FortiSIEM, and Security Fabric

    Where it doesn't

    • Pricing requires a sales conversation rather than public plan rates
    • Editions and licenses change included features and device limits
    • Its strongest fit depends on an existing Fortinet security environment
  • Microsoft Defender for Business9.4/10 · 30-day trial

    A focused endpoint security subscription with EDR and centralized controls for small businesses.

    Visit MicrosoftFull verdict →
  • FortiClient8.9/10 · Pricing on request

    A broad endpoint security client for teams already invested in Fortinet infrastructure.

    Visit FortinetFull verdict →

More comparisons

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update