Packet Capture (cStor®) vs PF_RING ZC (Zero Copy): Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
Packet Capture (cStor®) is a commercial network detection and response tool by cPacket Networks. PF_RING ZC (Zero Copy) is a free network detection and response tool. Compare features, ratings, integrations, and community reviews side by side to find the best network detection and response fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
Enterprise and mid-market security teams investigating protocol-level incidents will find Packet Capture (cStor®) invaluable for its lossless capture at 10–200 Gbps paired with petabyte-scale persistent storage, letting you replay and forensically analyze traffic weeks or months after compromise. The onboard indexing and Wireshark integration mean you're not shipping raw PCAPs offsite for analysis; incident response happens at wire speed with full packet fidelity. This is deliberate forensics tooling, not a detection platform; if you need real-time threat hunting or automated anomaly flagging across the network, you'll want this feeding data to a separate NDR layer.
Network teams running high-throughput security monitoring on commodity hardware will get the most from PF_RING ZC because zero-copy packet capture eliminates the kernel-to-userspace overhead that degrades detection accuracy under load. It sustains packet capture at 10+ Gbps on modest CPU overhead, which matters when your IDS or NDR tool chokes on dropped packets. Skip this if you need vendor support, GUI management, or out-of-the-box threat intelligence; PF_RING ZC is a kernel library for teams comfortable with C development and Linux tuning.
