1 Open Source Alternatives to Greynoise
A list of 1 carefully selected open-source alternatives to Greynoise.

The open-source alternatives are ranked based on our custom ranking system and score. This system takes into account various factors to determine the best alternatives.
If you’re looking for alternative features or workflows, here is a prepared detailed list of Greynoise open-source alternatives — each with its own distinctive strengths and key features.
CrowdSec is an open-source, community-driven security solution that leverages real-world threat intelligence to preemptively block malicious IPs. It enhances cybersecurity posture by integrating advanced AI-driven analysis with ultra-curated blocklists.

Key Features
- AI-driven threat intelligence
- Real-world, crowdsourced data from over 100K active users
- Preemptive blocking of malicious IPs
- Seamless integration with firewalls and CDNs
- Reduction in false positives and security alert volume
- Continuously updated, ultra-curated blocklists
Using real-world signals from an extensive global community, CrowdSec delivers AI-driven threat intelligence to block malicious IPs preemptively. It combines ultra-curated data and seamless integration with firewalls and CDNs to mitigate mass exploitation and zero-day attacks. The solution reduces false positives and alert fatigue while optimizing incident response and server performance, making it an essential component of modern cybersecurity infrastructures.