The gold standard for web3 security audits

  • 500+ audits completed by our auditors
  • Audits cover both on-chain & off-chain components
  • Multiple ecosystems, technologies, and programming languages
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Safeguard your Bitcoin project from security threats with source code audits, smart contract audits, system design reviews, and penetration testing by the Defense team.

Defense was founded with an ambitious vision: to bring in some of the best security auditing talent in the industry and raise the bar for security audits.

Not all audits are created equal
See our published audits
Precision

No shortcuts

Defense audits are comprehensive and manual. We read every line of code ourselves.

Expertise

A team of specialists

Our auditors have carried out hundreds of security audits for decentralized systems.

Excellence

High standards

We don’t give our stamp of approval casually — an audit from Defense is a signal to your users.

We've helped secure hundreds of millions in TVL across various projects and ecosystems.

Learn more about our services...

Smart Contract Audits

Thoroughly examining smart contract code to identify security vulnerabilities and verify proper functionality

System Design Review

Analysis of the system’s design to determine the sufficient integration of security into the system design and architecture prior to the implementation phase

Penetration Testing

Adversarial thinking and attack simulation to uncover vulnerabilities and providing recommendations for improved security

Source Code Audits

Identifying security vulnerabilities, implementation errors, and other best practice recommendations through comprehensive line-by-line code reviews

If you don’t find the vulnerabilities in your project, someone else will. Independent security audits can help keep your users’ assets, and your reputation, safe.

Why audit?
Security vulnerabilities can lead to...

  • Lost or stolen user funds

  • Wasted system resources

  • Downtime and service disruption

  • Exposure of sensitive user data

  • Loss of control over core system functions