Smart contract auditors and developers

Audit firms and development studios, filterable by blockchain and service. Each listing states where its information comes from.

13 vendors

Listings marked "Public information" were compiled from the companies' public pages and have not been reviewed by them. They are not partners of smart-contract.com and have not been vetted yet. Verified vendors went through our vetting process.

ABDK Consulting
Public information
Audits of smart contracts, ZK circuits and cryptographic schemes, plus research and consulting
- Audit
Ethereum · Starknet
Blaize
Public informationUkraine
Ukrainian blockchain development company with a dedicated security audit practice
- Development
- Audit
Ethereum · Polygon · Arbitrum · Solana · Sui · +4 more
ChainSecurity
Public informationSwitzerland
Zurich smart contract audit firm reviewing DeFi, stablecoin, bridge and L1/L2 code
- Audit
Ethereum · Solana · Starknet · Sui · Aptos
Cyfrin
Public information
Smart contract audits, penetration testing and security education, maker of Aderyn and Solodit
- Audit
- Penetration testing
Ethereum · ZKsync · Arbitrum · Avalanche · BNB Chain · +8 more
dOrg
Public informationUnited States
US-registered Web3 development cooperative building smart contracts, DeFi and DAO tooling
- Development
Ethereum · Starknet
FuzzingLabs
Public informationFrance
French offensive security company auditing blockchains and smart contracts with fuzzing
- Audit
Solana · Ethereum · NEAR · Starknet · Sui · +3 more
LambdaClass
Public information
Engineering firm building zero-knowledge systems, Ethereum clients and verified blockchain software
- Development
Ethereum · Starknet
Nethermind
Public informationUnited Kingdom
London blockchain engineering and research firm; its Nethermind Security arm audits smart contracts
- Development
- Audit
Ethereum · Starknet · ZKsync · Solana
Oak Security
Public informationGermany
Munich-based Web3 security firm auditing EVM, Solana, Cosmos, Substrate and Starknet code
- Audit
- Penetration testing
Ethereum · Solana · Cosmos · Polkadot · Starknet · +2 more
OpenZeppelin
Public informationUnited Kingdom
Smart contract security audits and the open-source OpenZeppelin Contracts library
- Audit
Ethereum · Arbitrum · Optimism · Base · ZKsync · +2 more
QuillAudits
Public information
Smart contract audit firm also offering dApp penetration testing, wallet audits and monitoring
- Audit
- Penetration testing
Ethereum · NEAR · BNB Chain · Polygon · Optimism · +8 more
ScaleBit
Public information
Web3 security team auditing smart contracts, dApps and blockchains, with a Bitcoin layer 2 focus
- Audit
Ethereum · Arbitrum · BNB Chain · Solana · Polygon · +3 more
Trail of Bits
Public informationUnited States
Security firm reviewing smart contracts, nodes and bridges, maker of Slither and Echidna
- Audit
- Penetration testing
Ethereum · Arbitrum · Optimism · Solana · Sui · +4 more

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