CrowdSec CTI

What it does

CrowdSec CTI is a cyberthreat intelligence (CTI) product built on a crowdsourced network rather than honeypots or a single research team. Its distinctive mechanism is a collective sensor model: more than 130,000 machines running CrowdSec's open-source detection engine report the IP addresses attacking them in real time, and a curation pipeline scores each signal by reporter trust, machine diversity, and cross-source consistency before it becomes shared intelligence. The result is behavior-based IP reputation drawn from live production attacks, not simulations.

How it works

Contributing engines detect malicious behavior locally by parsing logs, then share only the offending IP and attack context, so raw logs never leave each user's infrastructure. CrowdSec aggregates and deduplicates these reports into a database of more than 35 million malicious IPs, enriched with classifications such as brute-force, scanning, and credential stuffing mapped to MITRE ATT&CK, plus aggressiveness, background-noise, and autonomous-system reputation. Security teams consume the data through the CrowdSec Console, a REST CTI API, curated blocklists, and a Live Exploit Tracker that lists IPs actively exploiting specific CVEs, refreshed multiple times per hour.

Credentials and traction

CrowdSec's MIT-licensed engine is deployed by an open-source community spanning more than 190 countries and over 130,000 contributing machines that generate millions of attack signals each day. It processes only contextualized IP data under European GDPR rules, supported by a data protection impact assessment and an appointed data protection officer. The intelligence serves security operations teams, managed security service providers, and hosting and infrastructure operators.