Joy vs Viettel VCS-NSM: side-by-side comparison (2026)

Joy: A package for capturing and analyzing network flow data and intraflow data.

Viettel VCS-NSM: Real-time network security monitoring for threat detection using DPI and sandbox. Built by Viettel Security.

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

Joy is open-source with 1,356 GitHub stars. Viettel VCS-NSM is made by Viettel Security. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. Joy and Viettel VCS-NSM are both Network Detection and Response products, and both cover PCAP. Key differences: Joy is Free while Viettel VCS-NSM is Commercial, Joy is open-source. Use the table above to see where features, deployment and company size fit differ.