Automate custom vulnerability detection and map internet-exposed assets at scale.
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Tracked since2026
0 reviews trackedThe Bottom Line
Entry price
Free plan available, paid tiers above
Biggest pro
Fast vulnerability scanner
Biggest con
Learning curve
TL;DR - Nuclei
- Automates custom vulnerability detection using security templates.
- Maps internet-exposed assets and monitors cloud environments (AWS, GCP, Azure, Cloudflare).
- Offers a cloud platform for scaling security operations with integrations and APIs.
Pricing: Free plan available
Best for: Growing teams
What is Nuclei?
Nuclei is an open-source security scanner that helps organizations discover and understand their attack surface by mapping internet-exposed assets. It allows users to create and automate custom security templates to detect vulnerabilities efficiently. Nuclei also provides a real-time vulnerability feed to keep users updated with trending exploits.
For organizations, Nuclei offers a cloud platform with advanced automation capabilities. It can connect and monitor AWS, GCP, Cloudflare, and Azure accounts for security vulnerabilities. The platform supports team integrations with existing ticketing and alerting tools, and provides comprehensive REST APIs for building custom security workflows. It also caters to internal network security with automated vulnerability assessment and monitoring, and offers enterprise security features like SAML SSO and IP whitelisting.
Available on: Web
Pros & Cons
Pros
- Fast vulnerability scanner
- Template-based
- Open source
- Active community
- Good for security
Cons
- Learning curve
- False positives
- Template quality varies
- CLI focused
- Not for beginners
Key Features
Vulnerability scannerTemplate-basedFast scanningCustom templatesAPI supportOpen source
Pricing Plans
Free
Free
- Open source
- Security scanner
- Template-based
- Community templates
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Nuclei FAQ
What is Nuclei?
Nuclei is a fast vulnerability scanner that uses YAML templates to detect security issues across web applications and networks.
Is Nuclei free?
Yes, Nuclei is completely free and open-source under the MIT license.
What makes Nuclei different?
Nuclei's template-based approach makes it easy to add custom checks, and the community maintains thousands of templates.
Source: nuclei.projectdiscovery.io