Open Source Risk Management Tools
Operational risk management is mostly the discipline of keeping a register honest - every risk scored, owned, and reviewed on a cadence - and the tooling matters far less than whether anyone updates it, which is why this stays a thin open source space. The options here give you a self-hosted register for logging risks, assessments, mitigations, and controls with the scoring rules visible and adjustable, so your risk methodology is something you define rather than inherit from a vendor's fixed matrix.

CISO Assistant
Open source GRC platform for risk, compliance, audit, privacy, and reporting

Probo
Self-hostable GRC platform for engineers with web, CLI, MCP, and GraphQL access

OpenRMF
Web-based tool for DoD STIG checklists, SCAP and Nessus scans, and NIST RMF reporting

ISRA Security Risk Assessment Tool
Electron desktop app for ISO 27005 security risk assessments of engineering projects