Outnumbering cybercriminals all together
CrowdSec is an open-source and collaborative intrusion detection and remediation cybersecurity stack.
Analyze behaviors, respond to attacks & share signals across the community.

WHY CROWDSEC
Cybercriminals use compromised machines’ IP adresses to stay anonymous. But by teaming together, Sysadmins, Devops & Secops can outnumber them and burn all their precious masks. That is the essence of CrowdSec: a collaborative Cyber Security effort to secure the Internet, our countries, companies, institutions, privacies, personal data.
All together
PRODUCTS
Discover our products
CrowdSec provides a full suite of cybersecurity products for efficient protection of your online services, a SaaS-based dashboard to visualize & act upon threats, and a crowd-based threat intelligence database to preventively block aggressive incoming traffic
HOW TO GET started?
CrowdSec in figures
3.2 million
Rogue IPs detected
5.3 K
Stars on GitHub
160
Countries
+50k
Installations
The open-source and participative cyber defence solution
CrowdSec is the first open-source and collaborative cybersecurity solution, designed to run seamlessly on virtual machines, bare-metal servers, containers or to be called directly from your code with our API.
Join the crowd
Cybercriminals constantly collaborate together, on a world scale. Each IP they control are anonymity tokens to hide their hacktivities. Our only chance is to stand as a crowd and act in a coordinated way, as they do. When you, Sysadmins, DevOps & SecOps join forces, you outnumber them and can burn their IPs one by one, crippling this precious anonymity.
Leverage CrowdSec across diverse industries
VOIP
VOIP operators are frequently the target of credential thefts, allowing criminals to call additionally taxed telephone number services they own to cash-in money. CrowdSec protects VOIP servers by detecting and blocking credential brute forces attacks.
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Ecommerce
Ecommerce websites are amongst the most attacked websites. Most commun attemps include page scraping, credit card stuffing, credential stealing or scalping. CrowdSec provides protection against intrusion attempts by detecting all malicious activity and banning nefarious traffic while limiting false positives.
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MSSP
CrowdSec offers Managed Security Service Companies a simple all-in-one tool to monitor intrusion attempts on fleets of servers. Able to detect a large variety of attacks, CrowdSec comes with a dedicated SaaS tool to visualise and remediate all nefarious activity.
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SOC teams
With 50% of internet traffic generated by bots, Security Operations Center analysts are frequently overwhelmed with alerts and false positives. CrowdSec identifies automated and malicious trafic to feed only highly curated data to analysts, to remove alert fatigue and allowing users to focus on high priority threats.
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Discover how companies are using CrowdSec
Lookopen
We had a chat with Dyllan Pascoe, co-founder of Lookopen. Find out how he used CrowdSec and how it helped him secure his clients' IT assets.
Siegler Informatique
Yannick Siegler has been one of our earliest adopters and most involved community member. Discover his CrowdSec use cases, both for personal and professional use.
EsyOil
esyoil is using CrowdSec to bring multiple data sources together and block IPs even before they do something bad, leveraging log analysis.
Open-source since Day 1
At CrowdSec we believe the best way to develop cybersecurity software is to make them open-source. We are all about transparency, code quality and auditability. For us, it is the only way to create confidence in the software and in the code quality.
That is why we chose to make CrowdSec Agent open source from its inception with the most permissive license, MIT. Additionally, in time, we plan to open source other components of the CrowdSec solution.
Where you can use CrowdSec
OS
Services
Languages & Frameworks
Platforms