Microsoft Defender for Business
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VisitMicrosoft Defender for Business vs Sirius
What both publish
| Fact | Microsoft Defender for Business | Sirius |
|---|---|---|
| Headquarters | Redmond, Washington, United States | San Antonio, Texas |
| Purpose | Microsoft Defender for Business is an endpoint security solution for small and medium-sized businesses with up to 300 users that helps protect devices from ransomware, malware, phishing, and other threats. | Sirius is an open-source vulnerability scanner that combines network discovery, CVE detection, agent telemetry, and operator-driven triage. |
| Support | Microsoft's Defender for Business documentation provides a guide for getting help or contacting support. | Community support is available through Discord, GitHub Issues, and GitHub Discussions; the support page also describes enterprise priority support with dedicated channels and SLA guarantees. |
Microsoft Defender for Business plans
- Microsoft Entra Internet Access$5 a month
- Microsoft Entra Suite$12 a month
- Microsoft Defender for Business$3
Sirius plans
- Sirius ScanFree
- Sirius ProPriced on request
Pick Microsoft Defender for Business if…
You want what its maker publishes above — check its page for the details.
Pick Sirius if…
Sirius is presented for security teams that want an operator-focused scanner with network discovery, agent telemetry, and triage tools. It may suit teams comfortable with self-hosted Docker deployment and the listed host requirements.