C3 vs MITRE Caldera™: side-by-side comparison (2026)

C3: C3 is a framework by WithSecureLabs for rapid prototyping of custom command and control channels that integrates with existing offensive security toolkits.

MITRE Caldera™: MITRE Caldera™ is an automated adversary emulation platform built on the MITRE ATT&CK framework that supports red team operations and incident response activities through a modular C2 server and plugin architecture.

The table above shows where their features, integrations, deployment and company size fit differ.

C3 is open-source with 1,735 GitHub stars. MITRE Caldera™ is open-source with 6,816 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. C3 and MITRE Caldera™ are both Red-Team & Adversary Emulation products, and both cover C2, Red Team. Use the table above to see where features, deployment and company size fit differ.