Security & audits
Secure your apps with auditing services for Starknet Smart Contracts.
Auditing Tools
![Zellic](https://www.starknet.io/wp-content/uploads/2024/04/zellic_telegram-badge_hexagon-1.png)
Zellic
Zellic is a security research firm with deep expertise in blockchain security and cryptography, led by the best hackers in the world.
![Extropy](https://www.starknet.io/wp-content/uploads/2024/04/extropy-logoi.jpeg)
Extropy
Extropy provides auditing, training and development services for Web3 / ZKP companies.
![ChainSecurity](https://www.starknet.io/wp-content/uploads/2024/04/chainsecurity-logo.png)
ChainSecurity
ChainSecurity conducts smart contract audits since 2017 and enjoys an excellent track record having secured some of the largest DeFi protocols and Web3 projects.
![Nethermind Security](https://www.starknet.io/wp-content/uploads/2024/04/nethermind_security_ico.png)
Nethermind Security
Nethermind Security is the security arm of Nethermind, providing services related to Smart Contract Audits, Formal Verification, and Real-Time Monitoring.
![fuzzing labs](https://www.starknet.io/wp-content/uploads/2024/06/Logo_WhiteBG_ColorV1-1.png)
Fuzzinglabs is a blockchain security company specializing in vulnerability research and fuzzing, providing audit, training, and custom development services for Web3 and ZKP companies.
![Trail of Bits](https://www.starknet.io/wp-content/uploads/2024/04/trail-of-bits-logo.png)
Trail of Bits
Since 2012, Trail of Bits has helped secure some of the world’s most targeted organizations and products, combining high-end security research, with a real-world attacker mentality to reduce risk and fortify code.
![OpenZeppelin](https://www.starknet.io/wp-content/uploads/2024/04/openzeppelin-logo.png)
OpenZeppelin
OpenZeppelin is a leading blockchain security company providing products and audits to trusted organizations in Web3.
ConsenSys Diligence
ConsenSys is a leading smart contract auditing and blockchain security tooling for smart contract developers, auditors and web3 protocols.