Sirius
Sirius: A self-hosted scanner for teams that need open-source visibility across networks and hosts. Ranked #14 of 34 in Vulnerability Scanning Software by our editors (7.8/10); pricing: Free plan; best for open-source teams needing agent telemetry.
At a glance
- Editor score7.8 / 10
- PricingFree plan
- Best forOpen-source teams needing agent telemetry
- Free planYes
- Paid fromFree
- Deployment modelOn_premises
- Founded2014 · San Antonio, Texas
- Facts checked20 Sep 2026
Where it wins
- Combines network scanning, agent telemetry, and CVE detection
- Supports continuous discovery, risk scoring, trends, and CVSS filtering
- Provides an Operator Console, REST API, and Go SDK documentation
Where it doesn't
- Self-hosted deployment requires Docker-based operational ownership
- The stated scope does not include verified integrations
- The stated scope does not include compliance coverage
Our verdict on Sirius
Sirius is an open-source vulnerability management platform for security teams that need control over deployment and scanning workflows. It supports network infrastructure, hosts, cloud, and agents across Linux, macOS, and Windows environments, with web, API, and self-hosted access. Its focus is broad technical visibility: network vulnerability scanning, host-based agent telemetry, CVE detection, continuous asset and attack-surface discovery, triage, and remediation workflows. Teams comfortable operating an on-premises security platform are the clearest fit.
The platform’s feature depth centers on turning scan results into operator workflows. Severity and CVSS-based filtering, grouped vulnerability views, exports, trends, and risk scoring help teams organize findings rather than view them as an undifferentiated list. The Operator Console adds commands and agent management, while the REST API and Go SDK documentation support programmatic access. This combination makes Sirius more suitable for teams that want both agent telemetry and direct operational control than for buyers seeking a narrowly focused network scanner.
Sirius is free and open source, with a self-hosted Sirius Scan deployment and a separate managed Sirius Pro offering. The published product details describe Docker-based deployment and continuous scanning, so infrastructure ownership and onboarding effort remain important considerations. Its stated scope does not include verified integrations or compliance coverage, which limits its fit for organizations prioritizing a broad enterprise ecosystem or compliance-oriented workflow. Choose Sirius for open-source control, network visibility, and operator-led triage; consider an alternative when managed delivery, integration breadth, or compliance coverage is central.
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Sirius pricing
Sirius fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Deployment model | On_premises |
| Supported targets | network infrastructure, hosts, cloud, agents |
| Authenticated scanning | Not verified |
| Continuous scanning | Yes |
| Asset limit | Not verified |
| Compliance frameworks | Not verified |
| Deployment | Self-hosted |
| Platforms | Web, Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | opensecurity.com |
| Facts checked | 20 Sep 2026 |
Alternatives to Sirius
- VorninBroad cloud vulnerability coverage with a free tier for up to five assets.9.4
- IntruderBroad vulnerability coverage with a free tier and expansion paths for larger environments.9.3
- OpenVASA broad open-source scanner with authenticated testing, continuous scans and compliance features.9.0
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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