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Dev tools · January 25, 2021

CrowdSec

The massively multiplayer firewall

CrowdSec launched on January 25, 2021 with 74 votes, #580 of 3,157 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 5 years on.

Visit crowdsec.net ↗CrowdSec alternativestop 18% of January 2021

What it does

An open-source, free and collaborative security engine. Protect your IT assets and sites from all kinds of cyber attacks. Share malevolent IPs with fellow users and protect them too. Have each other’s backs. Make the Internet safer, together.

We turn crowd-powered intelligence into tactical intelligence with actionable blocklists to maximize your SOC efficiency and reduce your costs.

Malicious IPs you don’t know about are attacking you constantly. Zero-day exploiters will likely reach your servers and apps before you patch them. Mass scanners generate internet background noise that can hide attacks that pose real risks. Block up to 95% of mass exploitation attempts before they reach you. Gain new visibility over zero-day exploiters and other malicious IPs trying to attack you with 36% exclusive data over other CTI sources. Reduce security alert volume by up to 80% to focus on real threats and reduce overall alert fatigue. “With CrowdSec, we have eliminated between 40% and 50% of the background noise, saving two FTEs worth of time in incident response, as well as…from crowdsec.net

Does a similar job

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  • CT
    Crowdsec, the behavior and reputation-based collaborative firewall2020 · crowdsec.net · ▲17

    We turn crowd-powered intelligence into tactical intelligence with actionable blocklists to maximize your SOC efficiency and reduce your costs.

  • The CrowdSec Console2022 · app.crowdsec.net · ▲193

    Monitor cyber threats on your online services

  • CrowdSec, an open-source, modernized and collaborative fail2ban2020 · github.com · ▲15

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

  • Crowdcurity2015 · crowdcurity.com · ▲104

    Crowdsourced Application Security

  • Bugcrowd for Enterprise2015 · bugcrowd.com · ▲80

    Crowdsourced Security that’s Enterprise Ready

  • Crowdcruit2025 · crowdcruit.com · ▲44

    Hey HN, I'm an offensive security engineer (OSCE3) who's been frustrated for years with how broken cybersecurity hiring is. Companies struggle to evaluate real skills, and great hackers often get overlooked because they don't "interview well." So we have bootstrapped Crowdcruit: a hiring platform purpose-built for cybersecurity, combining verified technical achievements (CVEs, bug bounties, HTB/THM scores, certifications) with a smart matching system. Key Features: + Smart Matching: Candidates are matched to roles based on real-world skills — not just keywords. + Bug Bounty & CVE…

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