Open-Source Audit Management and Auditing Tools (2026)
Full-featured open-source audit management suites (planning, workpapers, findings tracking) are rare, and many commercial audit products have no open-source equivalent. In practice, technical teams assemble audit evidence with open-source scanners and inventory tools, then track findings in their ticketing or GRC process.
Because the slug is thin, this page broadens the angle to open-source IT, security and cloud auditing tools that generate audit evidence: asset discovery (Open-AudIT), host and standards scanning (Lynis, OpenSCAP) and cloud posture checks (Prowler, ScoutSuite, Cloud Custodian, Steampipe). Licences were read from each repository.
Tools, licences and pricing checked against vendor and repository pages on November 7, 2026.
What to look for
•Audit scope: hosts, network inventory, cloud accounts or compliance frameworks
•Support for recognised benchmarks such as CIS and standards like PCI-DSS
•Report formats and evidence exports suitable for auditors
•Automation and CI integration for continuous auditing
Free, open source (CLI); Turbot Pipes hosted offering available (see vendor pricing)
AGPL-3.0
1. Open-AudIT
AGPL-3.0
Best for: IT asset and configuration auditing · Free, open source (community); paid Professional and Enterprise editions available (see vendor pricing)
Open-AudIT is a network discovery and inventory tool that audits devices and software across a network. It stores results and offers reports, useful for IT asset and configuration audits.
Best for: Host hardening and compliance auditing · Free, open source (commercial Lynis Enterprise from CISOfy available)
Lynis is a security auditing tool for Linux, macOS and Unix systems that performs hardening and compliance checks and reports suggestions. It runs from the command line without installing agents.
Best for: Benchmark and policy compliance scanning · Free, open source
OpenSCAP provides tools to scan systems against SCAP security policies and benchmarks for configuration and vulnerability compliance, and generates reports.
Best for: Cloud security posture and compliance audits · Free, open source (hosted Prowler Cloud available, see vendor pricing)
Prowler is an open-source security tool for assessing cloud accounts across AWS, Azure and Google Cloud against best practices and frameworks. It produces reports for audit evidence.
Best for: Continuous policy-as-code cloud governance · Free, open source
Cloud Custodian is a rules engine for managing cloud resources, enforcing policies for security, cost and governance. Policies are written in YAML and can run on schedules or events.
Best for: SQL-based audit queries and benchmarks · Free, open source (CLI); Turbot Pipes hosted offering available (see vendor pricing)
Steampipe lets you query cloud and SaaS APIs with SQL and run compliance benchmark mods. It is useful for ad-hoc audit questions and evidence collection.
