Packet Capture (cStor®) vs replayproxy: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
Packet Capture (cStor®) is a commercial digital forensics tool by cPacket Networks. replayproxy is a free digital forensics tool. Compare features, ratings, integrations, and community reviews side by side to find the best digital forensics 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.
Forensic analysts and incident responders who need to reconstruct attacker behavior from network captures will find replayproxy invaluable for its ability to replay HTTP sessions directly from pcap files without manual extraction. The tool's lightweight design and zero-cost entry point make it practical for resource-constrained SOCs running ad-hoc investigations. Skip this if you need production-grade proxying or support for encrypted protocols; replayproxy solves a narrow forensic use case, not general proxy infrastructure.
