CrowdSec

CrowdSec is a French cyber threat-intelligence company built around open-source security software and shared detection data. Its software lets participating organisations identify hostile behaviour on their own systems and contribute attack signals to a common network. CrowdSec aggregates those observations into reputation and threat data that other participants can use.

The collaborative model draws on telemetry from organisations that range from individual server operators to larger networks. It can surface repeated attack patterns without waiting for every participant to maintain a separate threat-intelligence team. Because the signals come from observed traffic, the network may identify exploitation before a vendor or government agency publishes an advisory. CrowdSec does not itself set mandatory patch deadlines.