Microsoft Defender for Business Review
Endpoint detection for a Microsoft 365 company of 300 people or fewer, billed per user. A strong fit inside that tenant, and the wrong license past the cap or when you need a night shift.
Microsoft Defender for Business is worth it in 2026 when the company is already on Microsoft 365 and has 300 users or fewer. The standalone license is $3 per user per month, paid yearly, and one user covers five devices. The catch is everything outside that license: servers, user 301, and the hunting retention that Plan 2 keeps.
The license adds endpoint detection, automated investigation, and core vulnerability management, which free Windows antivirus does not include, so the built-in tool is not this product in disguise. The same protection is inside Microsoft 365 Business Premium at $22 per user per month, paid yearly, and a company already on that suite should not open a second endpoint order.
Analysts who will work a per-device console should price CrowdStrike before they standardize. A team that wants a SOC in the rate should price Huntress, because this license does not staff a night shift.
Defender for Business is the endpoint product Microsoft built for a small or midsize tenant, not a renamed copy of the antivirus Windows already includes. Buy it for a Microsoft 365 company whose devices are clients.
Leave it when the user cap, the servers, or the missing hunt history will change the invoice.
This review prices the standalone license, Business Premium, and the add-ons a security lead stacks next to it, because those extras are where a low user rate stops being the whole bill.
Then it sets those rates beside CrowdStrike, SentinelOne, Huntress, and Bitdefender.
Toolradar data: Toolradar, the software directory we run, evaluated 816 security tools in its September 2026 security ranking. Defender for Business is a Microsoft 365 license, so the suite record is the Microsoft 365 page on Toolradar.
How we compared: Microsoft's US product page, its SMB security pricing page, and the Defender for Business docs and FAQ, plus CrowdStrike's US pricing page, SentinelOne's package page, Huntress's pricing page with US dollars selected, and Bitdefender's US business pages, all read on September 24, 2026.
Year totals below are our multiplication of those rates. No vendor paid for a place in this review.
What is Microsoft Defender for Business?
Microsoft Defender for Business is an endpoint subscription based on Defender for Endpoint, for organizations of up to 300 users. It is sold standalone and included in Microsoft 365 Business Premium, so a Premium tenant should not pay for the same agents twice.
Tenants on Business Basic, Business Standard, or Office 365 E1 can add the standalone license and keep the suite they have. Past 300 users, Microsoft points you at enterprise plans, so this is the wrong contract if hiring will cross that line.
What you are buying is detection and response, not the antivirus already in Windows.
Microsoft's comparison includes next-generation protection, attack surface reduction, optimized endpoint detection and response, automated investigation and remediation, automatic attack disruption, core vulnerability management, and optimized threat analytics.
That set, on Windows, Mac, Android, and iOS or iPadOS, is what free Windows antivirus leaves out. Setup is the Defender portal, with default policies and simplified firewall and antivirus settings for Windows. Microsoft Threat Experts is not included, so no Microsoft analyst is assigned to your incidents.
Threat hunting and six months of data retention are how Microsoft describes Plan 2. A mix of this license and Plan 2 stays on the Business experience until every user is on Plan 2 and support switches the tenant. Partners can see incidents in Microsoft 365 Lighthouse, and the Defender APIs connect a remote monitoring tool.
How Microsoft Defender for Business works
Devices onboard in the Defender portal or through Intune. Simplified firewall and antivirus settings for Windows are included, but custom attack surface reduction rules require Intune, so a tenant without it cannot write its own rules.
Controlled folder access follows that same path, and Mac device control is set in Intune or Jamf. A Mac fleet with neither console cannot enforce device control from this license.
On this license, web filtering is one policy for the whole organization, so a department cannot get a stricter rule than everyone else. Removable-media control sits inside attack surface reduction, with the same Intune limit on custom rules.
A second antivirus on the device can turn real-time protection off. Microsoft says those machines then show as unprotected even though they are onboarded, so a side-by-side pilot looks like a coverage gap until the other agent is removed.
Windows Server and Linux need the Defender for Business servers add-on, on the standalone plan or on Business Premium, because servers are outside the user license. The add-on is priced per server instance at the same dollar amount as the user license and caps at 60.
Past that cap, you move to Defender for Endpoint Server or Defender for Servers, in a different portal.
The trial is 30 days, a card is required, and it converts to paid unless you cancel. After the paid term starts, a seven-day window allows a prorated refund. Defender Antivirus in Windows stays free and does not include this plan's detection or vulnerability management.
Microsoft Defender for Business key features
Microsoft Defender for Business pricing
The standalone rate is a monthly figure paid yearly, tax excluded, and set to auto-renew, so budget the annual commit rather than a month you can drop. One year of that user rate is $36: five people cost $180 for the year, and 20 people cost $720, our multiplication, before servers.
Each person can cover five devices, so the gap versus a per-device card shows up when staff keep a laptop and a phone. Counting 20 laptops as 100 sensors overstates the saving, because this license charges the person.
Falcon Complete and SentinelOne Enterprise are quotes, so those top tiers cannot sit beside this list price on one spreadsheet. Standalone Defender for Endpoint Plan 1 and Plan 2 publish no list price. Bitdefender totals a checkout for up to 100 endpoints online, rather than one shared sticker.
Business Premium is $22 per user per month, paid yearly, or $26.40 per user per month on the monthly subscription, still for up to 300 employees. The monthly figure is what you pay to avoid the annual commit. The no-Teams edition is $18.79 per user per month, paid yearly, on the Defender for Business product page.
Five Premium users on the yearly rate are $1,320 for the year, and 20 are $5,280. Buy Premium when you were going to pay for the apps, mail protection, identity, and device management anyway. Buy the standalone license when those pieces are already solved.
Business Standard is $14 per user per month, paid yearly, or $16.80 on the monthly subscription, and that plan is productivity plus standard filtering, not this endpoint license.
Standard plus the standalone license is $17 per user per month at the yearly rates, our addition, and that stack still omits Defender for Office 365, Intune P1, Entra ID, and Purview controls.
Microsoft also lists Entra ID P1 at $7 per user per month, Defender for Office 365 Plan 1 at $2 per user per month, and a device-management subscription at $8 per user per month, each paid yearly. Stacking those beside the endpoint license is how a pile of add-ons costs more than Premium.
Past 300 users, Microsoft's FAQ tells you to leave this plan, because the cap is not an overage you can pay. Microsoft 365 E5, which includes Defender for Endpoint Plan 2, is $60 per user per month, paid yearly, on the enterprise security page.
E5 without Teams is $51.45, and E3 with Teams publishes no list price. The wider invoice comparison is in how much EDR costs.
| Plan | Price | Best for |
|---|---|---|
| Defender for Business | $3/user/mo, paid yearly | Up to 300 users, five devices each, 30-day trial |
| Defender for Business servers | Same dollar amount per server instance | Add-on, tied to the user license amount, maximum 60 servers |
| Microsoft 365 Business Premium | $22/user/mo, paid yearly | Includes Defender for Business, up to 300 employees |
| Business Premium, monthly | $26.40/user/mo | Monthly subscription, auto-renews |
| Business Premium (no Teams) | $18.79/user/mo, paid yearly | Same suite without Teams, on the product page |
| Microsoft 365 Business Standard | $14/user/mo, paid yearly | Productivity plan, does not include this endpoint license |
| Business Standard, monthly | $16.80/user/mo | Monthly subscription for Standard |
| Entra ID P1 | $7/user/mo, paid yearly | Identity add-on, included in Business Premium |
| Defender for Office 365 Plan 1 | $2/user/mo, paid yearly | Email protection add-on on the SMB page |
| Device management subscription | $8/user/mo, paid yearly | Listed beside the endpoint plan on the SMB page |
| Microsoft 365 E5 | $60/user/mo, paid yearly | Includes Defender for Endpoint Plan 2 |
| Microsoft 365 E5 (no Teams) | $51.45/user/mo, paid yearly | E5 without Teams on the enterprise page |
| CrowdStrike Falcon Go | $59.99/device/yr, or $7.99/mo | USD, 100-device cap, prevention bundle |
| CrowdStrike Falcon Pro | $99.99/device/yr, or $14.99/mo | Adds host firewall management |
| CrowdStrike Falcon Enterprise | $184.99/device/yr, or $19.99/mo | Bundle row that describes EDR and hunting |
| SentinelOne Singularity Core | $69.99/endpoint/yr | USD, displayed for 5 to 100 workstations |
| SentinelOne Singularity Control | $79.99/endpoint/yr | Same workstation band, partner price can differ |
| SentinelOne Singularity Complete | $179.99/endpoint/yr | Detection listed, 14-day retention |
| SentinelOne Singularity Commercial | $229.99/endpoint/yr | 90-day retention, identity, managed hunting |
| Huntress Managed EDR, 50 endpoints | $8.99/endpoint/mo ($449.50/mo) | US dollar example, SOC included |
| Huntress Managed EDR, 100 endpoints | $7.99/endpoint/mo | Lower example rate at that commit |
Microsoft Defender for Business pros and cons
What we like
- Endpoint detection, automated investigation, and core vulnerability management on one user license, five devices per person.
- Included in Business Premium, so a company already buying that suite does not add a second endpoint order.
- Windows, Mac, iOS, and Android clients, with Lighthouse for partners running many small tenants.
What could be better
- Stops at 300 users, and a mix with Plan 2 stays on the Business experience until the whole tenant moves.
- Servers need a separate license, capped at 60, and Threat Experts plus six-month retention stay on Plan 2.
- One web-content policy for the organization, and custom attack surface reduction rules require Intune.
Who Microsoft Defender for Business is for
Buy it when the tenant is already Microsoft, under 300 people, and running client devices. A laptop and a phone stay on one user, which is the saving versus a sensor per device. A company signing Business Premium should treat the endpoint product as included and test whether Plan 2 hunting and retention are actually required.
An MSP with customers under that cap can use Lighthouse instead of staffing a SOC in every tenant.
Skip it when the constraint will not move. User 301 ends the SKU, and more than 60 servers needs a different server license, so growth and a server-heavy estate are both migrations. A hunt team that wants six months of retention is shopping Plan 2.
A night shift is not in the license, so price managed detection if nobody will open the portal after hours. Custom attack surface rules need Intune, and a second web-filter policy is not available, which rules out a department that must be stricter than the company.
File blocking without an investigation history is a different market, covered in antivirus for business.
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Best Microsoft Defender for Business alternatives
If Microsoft Defender for Business is not the right fit, these are the closest options.
| Tool | Best for | Starts at | |
|---|---|---|---|
| Microsoft Defender for Business | Microsoft 365 companies of 300 users or fewer that want detection on a user license. | From $3/user/mo, paid yearly | Visit → |
| CrowdStrike | Teams that will run a per-device console and want CrowdStrike's detection bundle. | From $59 | Visit → |
| SentinelOne | A workstation fleet inside the 5 to 100 band that can accept a partner's final price. | From $69 | Visit → |
| Huntress | A managed SOC on endpoints, when a 50-seat direct minimum is acceptable. | Example $8 | Visit → |
| Bitdefender GravityZone | Buyers who will enter a device count and want servers inside that online pack. | US checkout prices a device count up to 100 endpoints online, with no | Visit → |
The bottom line
Defender for Business is the rational endpoint buy for a Microsoft company under 300 users whose devices are clients, at one user rate, five devices, and no second bill if Business Premium is already the suite. Standardize on it when that matches the tenant you have this year.
Do not buy it only because the number is lower than a per-device card. Twenty people on the yearly user rate are $720 for the year, against $3,699.80 for twenty Falcon Enterprise devices and $3,599.80 for twenty Singularity Complete endpoints, our multiplication of the September 2026 list rates.
The Microsoft total wins for laptop-and-phone staff inside the cap, and it stops being a comparison once you add servers, pass 300 people, or need the hunt history Plan 2 keeps.
Choose CrowdStrike Falcon Enterprise when analysts will work that console. The Go card is the wrong twin if you need the detection line Enterprise describes, because Go does not grow into that line.
Choose SentinelOne Complete inside the printed workstation band, knowing a partner may change the sticker.
Choose Huntress when the missing piece is a SOC and you can meet the 50-seat direct minimum or buy through an MSP. Choose Bitdefender when the checkout should include file servers and you will read the tier before you pay, because the total is not a feature list.
Core vulnerability management here does not replace a scanner program.
Use vulnerability scanners and the Tenable review when patch evidence is its own control, and the endpoint detection guide when you want a rank rather than this invoice. Subscribe to Cyberpresso for the license changes that follow.
Cite this: Cyberpresso, "Microsoft Defender for Business Review 2026", September 2026.
Frequently asked questions
Sources
Prices and plan details come from each vendor's own pricing page, re-checked by the Toolradar pricing tracker.
- CrowdStrike pricing, checked Sep 2026
- SentinelOne pricing, checked Sep 2026
- Bitdefender GravityZone pricing, checked Sep 2026
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