
Secure Your Bitcoin Projects with Defense
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Purpose
We Secure Crypto & Web3 Technologies, Focusing on Projects Built with Bitcoin
Our auditors have completed
500+ audits
We've helped secure
10+ ecosystems
Bitcoin market cap
>$1.1 trillion
Ecosystems
Engagements
Featured Clients
Explore All Audits
Explore All Audits
Offerings
Our Services
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Learn More
Source Code Audits
Identifying security vulnerabilities, implementation errors, and other best practice recommendations through comprehensive line-by-line code reviews
Penetration Testing
Adversarial thinking and attack simulation to uncover vulnerabilities and providing recommendations for improved security
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
Smart Contract Audits
Thoroughly examining smart contract code to identify security vulnerabilities and verify proper functionality
Mechanisms
Our Expertise
Our audits cover both on-chain & off-chain components. We bring a wealth of experience in various languages, ecosystems & technologies
Dive Deeper
Dive Deeper
Ecosystems
Bitcoin
Ethereum + EVMs
Stacks
NEAR
Solana
Cosmos / Cosmos SDK
+ more
Technologies
Smart Contracts
Bridges
Node Implementations
Cryptography
Wallets + Browser Extensions
dApps
Languages
Solidity
Rust
Typescript / JavaScript
Go
Clarity
C/C++
CosmWasm
+ more