Smart contract auditors and developers

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

38 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.

4soft
Public informationPoland
Wrocław software house for blockchain development, on-chain analytics and crypto compliance
- Development
- Audit
Ethereum · Arbitrum · Base · Polygon · BNB Chain · +4 more
Blaize
Public informationUkraine
Ukrainian blockchain development company with a dedicated security audit practice
- Development
- Audit
Ethereum · Polygon · Arbitrum · Solana · Sui · +4 more
BlockyDevs
Public informationPoland
Warsaw software studio building Web3 products, with smart contracts in Solidity and ink!
- Development
Polkadot · Solana
BootNode
Public information
Web3 development consultancy building smart contracts, dApps and infrastructure for Ethereum teams
- Development
Ethereum · Optimism · ZKsync
ChainSafe
Public information
Open-source blockchain R&D firm offering protocol engineering, infrastructure and co-development
- Development
Ethereum · Polkadot · Optimism
Chainscore Labs
Public informationIndia
Pune blockchain engineering studio building DeFi protocols, wallets and node clients
- Development
- Audit
Ethereum · Arbitrum · Base · Polygon · Polkadot
CoinFabrik
Public informationArgentina
Argentine blockchain security and development company auditing Solidity, Rust, Clarity and Soroban
- Development
- Audit
Ethereum · Solana · Polkadot
dOrg
Public informationUnited States
US-registered Web3 development cooperative building smart contracts, DeFi and DAO tooling
- Development
Ethereum · Starknet
Ethereal Labs
Public informationUnited Kingdom
London onchain development studio building smart contracts, dApps, token and NFT launches
- Development
- Audit
Ethereum · Base · Solana · Polygon · Avalanche
Functori
Public informationFrance
French deep-tech firm building blockchain protocols, smart contracts and dApps, with formal methods
- Development
- Audit
Ethereum
INC4
Public informationUkraine
Kyiv engineering studio whose Blockchain Hub builds L1s, DeFi protocols and smart contracts
- Development
- Audit
Ethereum · Base · Arbitrum · BNB Chain · Polygon · +1 more
Labrys
Public informationAustralia
Brisbane product studio building smart contracts, DeFi protocols and full Web3 products
- Development
Ethereum · Base · Arbitrum · Optimism · Polygon · +1 more
LambdaClass
Public information
Engineering firm building zero-knowledge systems, Ethereum clients and verified blockchain software
- Development
Ethereum · Starknet
Lampros Tech
Public informationIndia
Ahmedabad engineering firm building Ethereum and Layer 2 smart contracts, dApps and DAO tooling
- Development
Ethereum · Arbitrum · Optimism · Base
LimeChain
Public informationBulgaria
Bulgarian blockchain engineering firm building smart contracts, protocols and onchain products
- Development
Ethereum · Polygon · Base · Solana · NEAR · +1 more
Linum Labs
Public informationSwitzerland
Swiss blockchain software studio building Web3 and fintech products on EVM, HyperEVM and Solana
- Development
Ethereum · Solana
Macro
Public information
Boutique firm auditing smart contracts and Solana programs, with protocol development
- Audit
- Development
Ethereum · Solana · Optimism · Arbitrum · Base
Metlabs
Public informationSpain
Spanish blockchain-only development company focused on RWA tokenization and smart contracts
- Development
- Audit
Ethereum · Polygon · BNB Chain · Arbitrum · Solana
MLabs
Public informationUnited Kingdom
London high-assurance engineering consultancy in Haskell and Rust, auditing Cardano contracts
- Development
- Audit
Cardano
Moonsong Labs
Public informationUnited States
Blockchain engineering firm for institutional protocols, tokenization and payment infrastructure
- Development
Ethereum · ZKsync · Solana · Polkadot
Nethermind
Public informationUnited Kingdom
London blockchain engineering and research firm; its Nethermind Security arm audits smart contracts
- Development
- Audit
Ethereum · Starknet · ZKsync · Solana
Nextrope
Public informationPoland
Polish digital asset infrastructure studio for EVM and XRPL: tokenization, DeFi, stablecoins
- Development
Ethereum
Obsidian Systems
Public information
High-assurance software firm building Daml and Canton applications for regulated capital markets
- Development
Protofire
Public information
Blockchain engineering firm building and auditing smart contracts on EVM chains, Solana and Cardano
- Development
- Audit
Ethereum · Solana · Cardano
Rather Labs
Public informationUnited States
Web3 and AI engineering firm with a Buenos Aires team, building and auditing smart contracts
- Development
- Audit
Ethereum · Arbitrum · Base · Optimism · Polygon · +5 more
RedDuck
Public informationUkraine
Web3 engineering partner writing audit-ready smart contracts on EVM chains, Solana and Bitcoin
- Development
Ethereum · Polygon · BNB Chain · Arbitrum · Base · +6 more
Rumble Fish
Public informationPoland
Kraków software house with a blockchain practice: smart contracts, DeFi, dApps, bridges
- Development
Ethereum · Solana · Polygon · BNB Chain · Avalanche
ScopeLift
Public information
Crypto engineering consultancy for Solidity smart contracts, dApp frontends and governance tooling
- Development
Ethereum
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
Solidity Labs
Public information
Security-first smart contract engineering team that embeds with DeFi and onchain product teams
- Development
Ethereum · Base · Optimism
Soramitsu
Public informationJapan
Tokyo blockchain company building payment systems, CBDCs, DeFi and Hyperledger Iroha
- Development
- Audit
TxPipe
Public information
Cardano engineering team offering smart contract development, audits and open-source Rust tooling
- Development
- Audit
Cardano
web3.berlin
Public informationGermany
Berlin Web3 agency for consulting, smart contract and dApp development, and node operations
- Development
Ethereum · Polygon
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
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
Zpoken
Public informationEstonia
Senior crypto engineering team for L1 consensus, zero-knowledge, DeFi mechanisms and stablecoins
- Development
Ethereum · Solana · NEAR · Arbitrum · Base · +1 more

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