Atomic Reactor is a free container security solution. Checkmarx Container Security is a commercial container security solution by Checkmarx. Features, integrations, deployment and the company behind each one, side by side.
What our shortlists say about the one we picked.
Best for: AppSec teams already using Checkmarx One
It fits best where your application security program already runs on Checkmarx, so container findings follow the same triage and gates as your code. If you need to stop attacks in live clusters, ask whether it blocks at runtime or needs a runtime product next to it.
From Best Container Security Solutions for Business, Fall 2026
Reviewed by Nika (Nikoloz) Kokhreidze.
Atomic Reactor is a Python library and CLI tool for building Docker images with advanced features including Git integration, registry operations, and build system integration.
Container image scanning & runtime security for containerized applications
See more solutions in this category, or build a security stack from your picks.
Based on what each listing shows: deployment, company size, price and open source.
Atomic Reactor fits if you need to run it on your own servers, you are a startup, you need a free product and you want an open-source product.
Checkmarx Container Security fits if you want a cloud product.
Common questions when comparing Atomic Reactor vs Checkmarx Container Security for container security.
Atomic Reactor: Atomic Reactor is a Python library and CLI tool for building Docker images with advanced features including Git integration, registry operations, and build system integration.
Checkmarx Container Security: Container image scanning & runtime security for containerized applications, built by Checkmarx.
The table above shows where their features, integrations, deployment and company size fit differ.
Atomic Reactor is open-source with 138 GitHub stars. Checkmarx Container Security is made by Checkmarx. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
Often, yes. Atomic Reactor and Checkmarx Container Security are both Container Security products, and both cover DevSecOps. Key differences: Atomic Reactor is Free while Checkmarx Container Security is Commercial, Atomic Reactor is open-source. Use the table above to see where features, deployment and company size fit differ.
Need the answer fast? Best Container Security Solutions for Business picks Sysdig Container and Kubernetes Security, Aqua Security Lifecycle Container Security, Snyk Container and 4 more.See the shortlist
