Smart contract auditors and developers

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

26 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.

Adevar Labs
Public informationUnited States
Blockchain security firm offering audits, fuzzing, formal verification and penetration testing
- Audit
- Penetration testing
Solana · Ethereum · Sui · Aptos · BNB Chain
CertiK
Public informationUnited States
Web3 security firm offering manual smart contract audits, formal verification and pentests
- Audit
- Penetration testing
Ethereum · BNB Chain · Polygon · TON · Cosmos
Coinspect
Public information
Web3 security firm: smart contract, L1/L2 protocol and source code audits, penetration testing
- Audit
- Penetration testing
Ethereum · BNB Chain · Polygon · Optimism · ZKsync · +2 more
CredShields
Public informationSingapore
Security firm offering manual smart contract audits, pentesting and the SolidityScan scanner
- Audit
- Penetration testing
Ethereum · Solana
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
Guardian
Public information
Smart contract audits with invariant fuzzing, plus off-chain pentests and SDK audits
- Audit
- Penetration testing
Ethereum · Solana
Hacken
Public informationEstonia
Estonian blockchain security and compliance firm: audits, pentests and MiCA, DORA readiness
- Audit
- Penetration testing
Ethereum · Solana · Sui
Halborn
Public information
Blockchain security firm: smart contract assessments, L1 reviews, penetration testing, advisory
- Audit
- Penetration testing
Ethereum · Solana · Cosmos
Hexens
Public informationUnited Kingdom
Offensive security firm auditing smart contracts, L1/L2 protocols, ZK and cryptography
- Audit
- Penetration testing
Ethereum · Polygon · ZKsync · Aptos
iosiro
Public informationSouth Africa
South African security firm offering smart contract audits, penetration testing and threat modeling
- Audit
- Penetration testing
Ethereum · Arbitrum
Kudelski Security
Public informationSwitzerland
Swiss cybersecurity company with a blockchain security assessment practice and public report archive
- Audit
- Penetration testing
Solana
Neodyme
Public informationGermany
German security firm auditing Solana programs and core blockchains, with pentests and trainings
- Audit
- Penetration testing
Solana · Ethereum
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
OtterSec
Public information
Blockchain security firm auditing layer 1s, wallets, DeFi and bridges, with pentesting and fuzzing
- Audit
- Penetration testing
Solana · Ethereum · Sui · Aptos · Cosmos · +1 more
Quantstamp
Public information
Web3 security firm offering smart contract audits, economic analysis and infrastructure tests
- Audit
- Penetration testing
Ethereum · Solana · Polygon · TON · Avalanche · +3 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
Salus
Public information
Web3 security firm offering smart contract audits, penetration testing and zero-knowledge services
- Audit
- Penetration testing
Ethereum · BNB Chain · Polygon · Arbitrum · Avalanche
Security Research Labs
Public informationGermany
Berlin security research firm reviewing smart contracts, chain runtimes and bridges
- Audit
- Penetration testing
Ethereum · Cosmos · Solana · Polkadot
Shieldify
Public informationBulgaria
Bulgarian Web3 security company offering smart contract audits by review or by subscription
- Audit
- Penetration testing
- Development
Ethereum · Solana · ZKsync · Avalanche · BNB Chain · +1 more
softstack
Public informationGermany
Flensburg Web3 company offering smart contract audits, pentests, development and compliance
- Development
- Audit
- Penetration testing
Ethereum · Arbitrum · Optimism · Base · Polygon · +8 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
Verichains
Public informationVietnam
Security firm auditing smart contracts, protocols and cryptography, with penetration testing
- Audit
- Penetration testing
Ethereum · BNB Chain · Solana · Avalanche · Polygon · +1 more
Xcapit
Public informationArgentina
Argentine software company building and auditing smart contracts, with pentesting services
- Development
- Audit
- Penetration testing
Ethereum · Polygon
Zealynx
Public informationPoland
Polish security firm offering smart contract audits, dApp pentesting and AI security reviews
- Audit
- Penetration testing
- Development
Ethereum · Arbitrum · Polygon · BNB Chain · Base · +4 more
Zellic
Public information
Security assessments of smart contracts, ZK circuits, L1s and web applications
- Audit
- Penetration testing
Ethereum · Solana · Aptos · Sui · Cosmos
Zokyo
Public informationUnited Arab Emirates
Smart contract and protocol audits, pentesting, compliance and product development, Dubai
- Audit
- Penetration testing
- Development
Ethereum · Solana · Polygon · Arbitrum · Optimism · +9 more

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