Smart Contract Auditors

Trusted security firms reviewed by practitioners. Compare expertise, track record, and pricing.

Trail of Bits

$$$ 4.9/5

Founded 2012

smart contracts cryptography protocol design

Notable audits

Compound, Uniswap, MakerDAO

OpenZeppelin

$$$ 4.8/5

Founded 2015

smart contracts defi governance

Notable audits

Aave, Compound, Coinbase

Cyfrin

$$ 4.7/5

Founded 2022

smart contracts defi nft

Notable audits

Beanstalk, Sudoswap, Sablier

Spearbit

$$$ 4.8/5

Founded 2021

smart contracts defi protocol design

Notable audits

OpenSea, Morpho, Blast

ConsenSys Diligence

$$$ 4.6/5

Founded 2017

smart contracts defi formal verification

Notable audits

Aave, Uniswap V3, 0x Protocol

Halborn

$$ 4.3/5

Founded 2019

smart contracts penetration testing cloud security

Notable audits

Sushi, ApeCoin, Pangolin

Quantstamp

$$ 4.4/5

Founded 2017

smart contracts defi nft

Notable audits

MakerDAO, Lido, Polygon

CertiK

$$ 3.8/5

Founded 2018

smart contracts defi nft

Notable audits

PancakeSwap, Gala Games, Polygon

Sherlock

$$ 4.5/5

Founded 2021

smart contracts defi protocol design

Notable audits

Optimism, LooksRare, Notional

Code4rena

$$ 4.5/5

Founded 2021

smart contracts defi competitive auditing

Notable audits

ENS, OpenSea, Canto

Sigma Prime

$$$ 4.7/5

Founded 2016

smart contracts consensus protocols staking

Notable audits

Lido, Ethereum Foundation, Synthetix

Runtime Verification

$$$ 4.7/5

Founded 2010

formal verification smart contracts protocol design

Notable audits

Ethereum 2.0, Uniswap, MakerDAO

Zellic

$$$ 4.6/5

Founded 2022

smart contracts zk proofs bridges

Notable audits

LayerZero, Sui, Worldcoin

Ackee Blockchain

$$ 4.4/5

Founded 2017

smart contracts solana defi

Notable audits

Solana Foundation, Jet Protocol, Marinade

Hexens

$$ 4.5/5

Founded 2021

smart contracts bridges l2

Notable audits

zkSync, Scroll, Starknet

Dedaub

$$ 4.5/5

Founded 2018

smart contracts defi static analysis

Notable audits

Uniswap, Euler, Olympus DAO

Pessimistic

$$ 4.3/5

Founded 2021

smart contracts defi bridges

Notable audits

Lido, 1inch, Symbiosis

OtterSec

$$$ 4.7/5

Founded 2021

smart contracts solana bridges

Notable audits

Solana Foundation, Wormhole, Jito Labs

NCC Group

$$$ 4.5/5

Founded 1999

cryptography smart contracts protocol design

Notable audits

Zcash, Ethereum Foundation, Protocol Labs

Kudelski Security

$$$ 4.4/5

Founded 2012

cryptography smart contracts protocol design

Notable audits

Solana Stake Pool, Lido, Cosmos SDK

Sec3

$$ 4.3/5

Founded 2021

solana smart contracts runtime monitoring

Notable audits

Marinade Finance, Raydium, Mango Markets

Neodyme

$$ 4.4/5

Founded 2021

solana smart contracts rust

Notable audits

Solana Stake Pool, Marinade Finance, Wormhole

Pashov Audit Group

$$ 4.7/5

Founded 2023

smart contracts defi protocol design

Notable audits

Aave, Uniswap, Ethena

Guardian Audits

$$ 4.5/5

Founded 2022

smart contracts defi fuzzing

Notable audits

GMX, Level Finance, GainsNetwork

Cantina

$$ 4.6/5

Founded 2023

smart contracts defi competitive auditing

Notable audits

Ethereum Foundation (Pectra), Aave, Morpho

Hats Finance

$ 4/5

Founded 2021

smart contracts defi competitive auditing

Notable audits

Various DeFi protocols

Hacken

$$ 4.2/5

Founded 2017

smart contracts defi penetration testing

Notable audits

Binance, Bybit, OKX

Nethermind Security

$$$ 4.6/5

Founded 2020

smart contracts formal verification zk proofs

Notable audits

World, Starknet, Lido

BlockSec

$$ 4.5/5

Founded 2021

smart contracts defi monitoring

Notable audits

MetaMask, Uniswap Foundation, Compound

Veridise

$$$ 4.6/5

Founded 2021

zk proofs formal verification smart contracts

Notable audits

Risc Zero, Succinct, Linea

zkSecurity

$$$ 4.5/5

Founded 2022

zk proofs cryptography mpc

Notable audits

Various ZK protocols

MixBytes

$$ 4.3/5

Founded 2017

smart contracts defi substrate

Notable audits

Lido, Curve, Yearn

0xMacro

$$ 4.5/5

Founded 2022

smart contracts defi protocol design

Notable audits

Thirdweb, Superfluid, Maple Finance

Three Sigma

$$ 4.4/5

Founded 2022

smart contracts defi move

Notable audits

Maple Finance, Various DeFi protocols

MoveBit (BitsLab)

$$ 4.3/5

Founded 2022

move aptos sui

Notable audits

Aptos Foundation, Sui ecosystem projects, Liquidswap

QuillAudits

$ 4/5

Founded 2018

smart contracts defi nft

Notable audits

Taiko, Polygon, Manta

Oxorio

$$ 4.3/5

Founded 2018

smart contracts defi protocol design

Notable audits

Various DeFi protocols

Hashlock

$ 4.1/5

Founded 2020

smart contracts defi nft

Notable audits

Various APAC blockchain projects

SigIntZero

$$ 4.3/5

Founded 2022

smart contracts defi l1 l2

Notable audits

Various DeFi and L1 protocols

Softstack

$$ 4.2/5

Founded 2017

smart contracts defi penetration testing

Notable audits

Various European blockchain projects

Blaize

$ 4/5

Founded 2018

smart contracts defi nft

Notable audits

Various DeFi protocols

Certora

$$$ 4.7/5

Founded 2017

formal verification smart contracts defi

Notable audits

Aave, MakerDAO, Uniswap