Nuclei vs Sirius

Nuclei is a free, open-source vulnerability scanner for applications, infrastructure, cloud platforms, and networks. It uses YAML templates to define checks, drawing on more than 6,500 community-contributed templates; users can also create custom templates. Bulk and parallel scans, multiple target formats, and inclusion and exclusion filters are supported. Modules cover HTTP, DNS, TCP, headless, JavaScript, code, and file scanning, and authentication options include HTTP basic authentication and JWT. Nuclei can run in CI/CD pipelines, including through GitHub Actions, and export SARIF results to GitHub Code Scanning. It is distributed under the MIT License and is primarily a standalone CLI tool, with installation options including Go, Homebrew, Docker, GitHub, downloadable binaries, and Helm. It is actively developed, but has no LTS or stable version, so updates may bring breaking changes. Some templates can fuzz or take actions that risk denial of service; these are tagged and excluded from default scans. The tool is intended for security engineers, analysts, red teams, DevOps teams, bug bounty hunters, and penetration testers.

Sirius is an open-source vulnerability scanner for security teams that want operator control over discovery and triage. It combines network discovery, CVE detection, agent telemetry, and scanning through Nmap and Naabu. The Vulnerability Navigator provides severity groupings, CVSS-based filters, and export options; the Operator Console supports command execution, command history, and active-agent management. Dashboards show service health, infrastructure metrics, vulnerability trends, and centralized logs. Sirius can run in production or development mode through Docker Compose. Its listed minimum requirements are Docker Engine 20.10.0+ with Compose V2, 4 GB RAM, and 10 GB of free disk space. Supported host systems are Linux, macOS, and Windows through WSL2. REST endpoints on port 9001 use an API key, with documentation linking to an API reference and Go SDK. The Sirius Scan plan is free for self-hosted Docker use. Community support is available through Discord, GitHub Issues, and GitHub Discussions; the support page also describes enterprise priority support.