Freemium
TryHackMe
Browser-based hands-on cyber security labs and guided paths
Security LearningGuided cyber security rooms
Alternatives to Hack The Box
12 tools like Hack The Box, chosen by what they do. About Hack The Box
Free
Web Security Academy
Free online web security training with interactive labs
Security LearningFree web security training
Open source
OWASP Juice Shop
Deliberately insecure web app for security training and CTFs
Security LearningDeliberately insecure web app
Free
OWASP Foundation
Nonprofit hub for free application security projects and standards
Security LearningOpen web security community
Open source
OWASP Cheat Sheet Series
Short security guides for developers, one topic per sheet
Security LearningConcise security cheat sheets
Free
Google Skills
Hands-on Google Cloud labs, courses and certificates
AI Cloud SecurityHands on Google Cloud labs
Freemium
AWS Skill Builder
Official AWS training, labs and certification prep for cloud skills
AI Cloud SecurityAWS training and certification
Freemium
Snyk
Finds security risks in AI-written code, agents and apps
Code SecurityFind and fix vulnerabilities
Open source
Zed Attack Proxy (ZAP)
Free open source scanner for finding security flaws in web apps
Web SecurityFree web app scanner
Curated
Checkmarx
Enterprise platform that scans code for security flaws and risks
Code SecurityEnterprise code security
Freemium
Aikido
Security platform for code, dependencies, cloud and pentests
Code SecurityAll in one security for devs
Paid
Sucuri
Website security service for malware cleanup and firewall
Network DefenseWebsite firewall and cleanup