CrowdSec

CrowdSec operates on a simple but mathematically compelling premise: the internet's defenders are more numerous than its attackers, and they're not sharing data effectively. The company runs a collaborative security network where participants contribute real-time signals about aggressive IP behaviors - think of it as a neighborhood watch at internet scale, where every node that detects a threat makes every other node safer. With over 100,000 active users across 190+ countries, the network's threat intelligence now preemptively blocks up to 95% of mass exploitation attempts. The platform's core technical play is crowd-sourced threat intelligence that surfaces signals most vendors miss: 36% of the malicious IPs in CrowdSec's database are unknown to 89 out of 92 other threat intelligence providers. The product stack centers on the CrowdSec Security Network , which aggregates and redistributes behavioral threat signals across its user base, and CrowdSec Threat Intelligence Blocklists , curated feeds that claim to cut security alert volume by up to 80% with zero false positives. The underlying tools are open-source, and the architecture is designed to be accessible - from individual developers spinning up a honeypot to enterprise security teams integrating blocklists into existing SIEM or firewall infrastructure. The company's approach inverts the traditional vendor model: instead of building proprietary threat data behind a paywall, it scales intelligence by adding participants. The threat model it's targeting is high-volume, automated scanning and mass exploitation - the kind of background radiation that every internet-facing system absorbs daily. Technical domains of focus include network security, real-time threat intelligence, and distributed security architecture.