Entry cost is 3 USD per user per month, about 36 USD per user per year for the standalone plan.
About
In practice. What you can do with Microsoft Defender.
Microsoft Defender for Business brings AI-powered endpoint detection and response to small and medium organizations: it blocks malware and ransomware, reduces the attack surface with firewall and network protection rules, and can automatically disrupt a human-operated ransomware attack in progress. Automated investigation and a simplified setup wizard let an admin without a dedicated security team get protection running.
The standalone plan costs 3 USD per user per month and covers up to 300 users with 5 devices each; server protection and larger deployments need a separate add-on or an enterprise Defender plan. It is also bundled into Microsoft 365 Business Premium at 22 USD per user per month.
Practical uses
Endpoint protectionAn IT admin enrolls company laptops and phones so Defender blocks malware and ransomware automatically.
Bundled securityA small business on Microsoft 365 Business Premium gets Defender for Business included with its productivity suite.
Features & use cases
Consulting workflow
Pros and cons. What Microsoft Defender does well, and what to expect.
Pros
Blocks malware and automatically disrupts human-operated ransomware attacks in progress.
Can be bundled into Microsoft 365 Business Premium for teams already on that suite.
Cons
Capped at 300 users and 5 devices per user, so it does not scale to larger organizations.
Server protection is a separate paid add-on, not included in the base price.
When it makes sense. Keep Microsoft Defender, or challenge it?
Keep if
Keep it if you run a small or medium organization (up to 300 users) that needs endpoint protection without a dedicated security team.
Microsoft Defender becomes worthwhile when
+You use it at least once a week
+The monthly cost ($3) is small next to the time it saves you
Challenge if
Avoid it if you need to protect servers by default or have more than 300 users: both require extra add-ons or an enterprise plan.
Microsoft Defender becomes too expensive when
−You use it less than once a month
−A simple free version or a tool already in your stack would do
Our verdict. What to know about Microsoft Defender.
Why this verdict
Average
Added value
At 3 USD per user per month it adds AI-powered endpoint protection cheaply, but no comparative cost data against other EDR tools is available.
Simplicity
A simplified setup wizard is mentioned, but no concrete time-to-first-result is stated in the collected sources.
Fit for purpose
Blocks malware and automatically disrupts ransomware attacks in progress, matching the stated promise without a mentioned workaround.
Performance
Covers detection, response, attack surface reduction and vulnerability management, but is capped at 300 users with no comparison data to call it a category reference.
Reversibility
Neutral score: data export and portability are not covered by the collected sources.