Alien Vault Ossim vs Apache Metron: 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. Apache Metron 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.
Teams building detection pipelines on existing Hadoop or Spark infrastructure should evaluate Apache Metron; you get a free, open-source SIEM that integrates directly with your big data stack instead of forcing a separate commercial platform. The 868 GitHub stars and active Apache stewardship indicate stable community maintenance, though you're inheriting operational complexity,Metron requires deep engineering capacity to deploy and tune. Skip this if your organization lacks Hadoop expertise or needs vendor support; you'll spend more on integration work than you'd pay for a managed SIEM.
