# crowdsecurity/crowdsec

CrowdSec - the open-source and participative security solution offering crowdsourced protection against malicious IPs and access to the most advanced real-world CTI.

Repository: https://github.com/crowdsecurity/crowdsec
Canonical: https://ross.abutalabs.com/products/crowdsec
Homepage: https://crowdsec.net
Language: Go
License: MIT
License Family: permissive
Topics: security, linux, protection, detection, attacks-prevention, ids, ips, waf
Last push: 2026-08-26T18:37:07+00:00

## Health v2 (maintenance only)
Score: 89/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 71, longevity 100
- inputs: {"age_days": 2301, "days_push": 7, "days_rel": 114, "gap_med": 40.5, "n_releases_24m": 17}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 14655, forks 710 (observed 2026-08-28T04:11:07.393395+00:00)

## What it is
CrowdSec is an open-source, crowdsourced security engine that analyzes logs and HTTP requests to detect malicious behavior and block offending IPs, functioning as an IDS/IPS and WAF. It shares detected attacker IPs with a community network in exchange for a real-time community blocklist, with commercial curated threat intelligence available.

## Use cases
- block malicious ips attacking my server
- fail2ban alternative with crowdsourced blocklist
- detect and ban brute force attempts from logs
- protect web server from scanners and bots
- waf to block web exploits
- share attack data and get community blocklist
- feed ip blocklists into firewall or cdn
- reduce alert noise from mass scanners

## When to choose
- you need log-based intrusion detection with automatic IP remediation across Linux servers
- you want a modern, actively maintained fail2ban replacement with community threat intelligence
- you need to push curated blocklists into firewalls, CDNs, or reverse proxies
- you want both IDS/IPS behavior detection and a WAF/AppSec component in one engine

## When to avoid
- you need endpoint antivirus or malware scanning rather than network/IP-based protection
- you require a fully self-contained solution with no external blocklist or community network dependency
- you need deep packet inspection of encrypted traffic or host-based EDR capabilities

## Facets
- artifact type: application
- maturity: stable
- function: security, monitoring, logging, rate-limiting, middleware
- domain: security, self-hosted, networking
- platform: go, self-hosted, cross-platform
- tags: ids, ips, waf, fail2ban-alternative, threat-intelligence, crowdsourced-blocklist, log-analysis, ip-reputation, intrusion-detection, firewall-integration, devops, linux, docker

## Member repositories
- crowdsecurity/crowdsec (main) score 89

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:07.393395+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:12:26.077714+00:00, confidence not recorded.
  - readme: https://github.com/crowdsecurity/crowdsec (fetched 2026-08-28T04:11:07.393395+00:00, sha f4f0db246194)
  - homepage: https://crowdsec.net (fetched 2026-08-29T08:05:41.075408+00:00, sha e1374768c0d3)
  - site_page: https://www.crowdsec.net/about (fetched 2026-08-29T08:05:41.092490+00:00, sha 29310e31e501)
  - site_page: https://www.crowdsec.net/pricing (fetched 2026-08-29T08:05:41.084895+00:00, sha 721c4c990fb6)
  - site_page: https://www.crowdsec.net/our-data (fetched 2026-08-29T08:05:41.086891+00:00, sha a607ad63234d)
  - site_page: https://www.crowdsec.net/integrations (fetched 2026-08-29T08:05:41.089012+00:00, sha 33f3135a3577)
  - site_page: https://doc.crowdsec.net/ (fetched 2026-08-29T08:05:41.090694+00:00, sha c7098805548e)
  - site_page: https://www.crowdsec.net/faq (fetched 2026-08-29T08:05:41.094400+00:00, sha ec6b1114cf1a)
- Data as of 2026-08-30T08:39:29.467469+00:00.