Alien Vault Ossim vs sysmon-modular: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
Alien Vault Ossim is a free security information and event management tool. sysmon-modular is a free security information and event management tool. Compare features, ratings, integrations, and community reviews side by side to find the best security information and event management fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
Smaller security teams without budget for point tools will find AlienVault OSSIM's all-in-one approach valuable; the free pricing model lets you run asset discovery, vulnerability scanning, and SIEM collection on a single appliance without licensing friction. The platform handles event correlation across network, vulnerability, and asset data on the same box, which cuts operational overhead compared to stitching three separate tools together. Skip this if you're running high-volume environments (10,000+ events per second) or need deep customization in any single function; OSSIM trades depth for breadth.
Security operations teams building Windows detection infrastructure on tight budgets should adopt sysmon-modular for its pre-built, community-maintained Sysmon rulesets that eliminate weeks of tuning work. With nearly 3,000 GitHub stars and active maintainers shipping modular configs for process creation, network activity, and registry changes, you're inheriting battle-tested detection logic rather than starting from scratch. This is free software that trades vendor support for a self-service model, so skip it if your team needs commercial SLA backing or can't maintain a homegrown Sysmon pipeline.
