LetsDefend Alternatives & Competitors

TryHackMe is an online platform for learning and teaching cyber security, all through your browser.

Key TryHackMe features:

Hands-On Experience Wide Range of Topics Guided Learning Paths Cost-Effective

An online platform to test and advance your skills in penetration testing and cyber security.

Key Hack The Box features:

Realistic Practice Environment Community and Collaboration Diverse Skill Levels Regular Updates

Open Source

The desktop AI tool for cybersecurity professionals. Built for pentesters, red teamers, and security engineers — agentic AI that runs on your machine, works with your tools, and executes real security workflows.

Key Hacker Sidekick features:

AI-Powered Bug Bounty Assistance Time Savings for Security Researchers Beginner-Friendly Centralized Workflow

Try for free freemium $25.0 / Monthly

VulnHub provides materials allowing anyone to gain practical hands-on experience with digital security, computer applications and network administration tasks.

Key VulnHub features:

Hands-on Learning Community Driven Content Variety of Difficulty Levels Free Access

Open Source

PwnTillDawn Online Battlefield is an online platform that allows you to learn and improve your pentesting and other cybersecurity assessments skills.

Key PwnTillDawn Online Battlefield features:

Interactive Learning Environment Wide Range of Challenges Community Engagement Continuous Updates

Learn all about web hacking through online courses spanning the basics to advanced vulnerabilities.

Key PentesterLab features:

Comprehensive Learning Hands-On Labs Beginner to Advanced Content Certificates of Completion

Hack This Site is a legal free training ground for users to test and expand their hacking skills.

Key HackThisSite features:

Educational Experience Community Support Variety of Challenges Legal and Safe Environment

CodeRed, EC Council’s continuous learning platform will equip you with globally recognized cybersecurity skills to prevent cyberattacks around the world.

Key CodeRed by EC-Council features:

Comprehensive Content Expert Instructors Practical Learning Flexible Learning

freemium

Improve your hacking skills by meeting CTFs players, Cybersecurity mentors.

Learn server hardening in your browser: SSH hardening, UFW + fail2ban, nginx TLS, HTTPS deployment, Docker, pentest basics — each task runs on your own Linux VM and is auto-validated. Free, EU servers.

CBT Nuggets is a video-based eLearning platform for IT professionals. It is accessible from both a desktop browser and mobile devices. Learners pay on a monthly, semiannual, or annual basis, with discounts available for multi-year agreements.

Key CBT Nuggets features:

Expert Trainers Broad Course Library Hands-on Labs Flexible Learning

Learn ethical hacking from more than 150+ tutorials & certification training materials.

Key pwn.guide features:

Attack Lesssons Defend Lesssons Certification Training Privacy Friendly

freemium $4.79 / Monthly (pwn.guide+)

PENTESTON is an easy to use platform that can test network devices, custom web applications, and internet telecommunication devices for security bugs and flaws that affect integrity, confidentiality, or system availability.

Key PENTESTON features:

Check target No more fee Correlation API

freemium $39.0 / Monthly (Expert plan)

Learn the core transferable skills of setting up Linux virtual servers and containers.

Key Deployment from Scratch features:

Comprehensive Guide Customizability Skill Development Open Source

Open Source