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Top 7 Smart Contract Audit Companies (2024 Updated)

Raman Sha
Reviewed by
11 min read

Key Takeaways:

  • Smart contract auditing ensures the security and integrity of protocols, with significant financial implications.
  • Reputable auditing firms are critical as users increasingly verify audit origins before protocol engagement.
  • Choosing the right auditor involves considering experience, chain support, audit depth, and cost.
  • Top firms in 2024 include Certik, Hashlock, ConsenSys Diligence, Cyfrin, and Hacken, each with unique strengths.
  • Regular auditing is essential in the Web3 space to prevent hacks and secure smart contracts.

Smart contract auditing is a critical step in ensuring the security and integrity of your protocol, and with billions of dollars lost to bugs in the last few years, it's more important than ever.

With the circulation of great information, even users are now accustomed to checking if the smart contract audit of a protocol was done by a reputed company or not before using it.

But with so few companies offering these services, how do you choose the right smart contract auditing firm for your needs?

In this article, we'll take a look at some of the top smart contract auditing companies in 2024 and what makes them stand out.

Whether you're looking for the most comprehensive audit possible or the most cost-effective solution, we've got you covered.

Keep reading to learn more. 👇

Why Should You Audit Smart Contracts?

A smart contract is programmed and deployed onto the blockchain. Once it has been deployed, there is no going back.

A minor bug can break an entire protocol and a malicious user can drain out its funds within a matter of minutes. In 2022 alone, $3.8 Billion have been stolen from de-fi protocols based on a recent 2022 Crypto Crime Report shared by Chainalysis.

Chainalysis Crypto Crime Report 2022

Recently we also saw malicious intent through the introduction of a bug directly from the person writing the actual smart contract in the first place.

However, in most instances, it is human error.

Smart contract itself is a new concept that has been there only for a few years. Only a handful of developers are very experienced in this field.

It is difficult for a developer or even a team of developers to think of every possible edge case to secure their contracts like Fort Knox. It pays a huge dividend to get a third set of eyes on your smart contracts to rule out possible issues with the code that could end up wiping all the funds inside.

Therefore, it is essential to get every piece of smart contract audited.

One of the ways to make sure your smart contracts are secure is by following a proper Web3 security journey such as the one Patrick Collins explained in his interview with us.

Right from private audits to competitive audits, everything has an important role to play in making a Web3 protocol more secure.

Let's Rewind a Bit: What Is a Smart Contract?

A smart contract is a digital agreement that is programmed and enforced on a blockchain. This was initially popularized by Ethereum, which then made its way to various other blockchains.

Through a smart contract, the developers can automate any digital contractual agreement with the right set of parameters.

Smart contracts are tamper-proof, transparent, and secure. However, as we discussed there are risks associated with using smart contracts.

How to Choose a Smart Contract Auditor Firm?

When looking to hire a smart contract auditor, you should keep a few things in mind. The first is that not all auditing companies are created equal.

Some firms have more extensive experience in auditing smart contracts than others and have the best talent.

The second thing you need to keep in mind is your requirements.

While most firms conduct smart contract audit services on the Ethereum chain, only some support other chains such as Solana or Binance Chain.

Also, you might have to choose your auditing services company depending on how thorough you want the audit to be.

The third is the cost of the audit process. Getting the most talented people to create an audit report and review your smart contract is going to be very expensive.

Some of the top auditing companies charge six figures per audit. So you might have to choose your auditing firm depending on your budget.

Another factor that comes into play here is how valuable that audit is going to be from a user perception as well as the actual security perspective.

Choose an audit firm with not much experience and they might just miss a red flag in your contract or your users might even not trust that audit at all discouraging them from using the contract in the first place.

Who Are the Top Smart Contract Auditing Companies in 2024?

In this section, we'll introduce you to some of the industry's best smart contract auditing companies. These firms have established themselves as experts in smart contract auditing, with a proven track record of delivering high-quality audits.

Whether you're a startup in the NFT or DeFi space, or an established player in the blockchain network, these firms can provide you with blockchain security services to deploy your smart contract with confidence.


Hashlock is Australia's leading independent blockchain cybersecurity and smart contract auditing firm. They are a highly specialized Blockchain Cybersecurity firm coming from manual analysis, security assessments, and community auditing backgrounds and differentiate by the number of findings and maintaining a high level of collaboration with security experts and clients, both in Australia and globally.

Hashlock is a member of Blockchain Australia and Fintech Australia advocacy bodies which gives them additional credibility in the Australian market. The founding team has 20 years of combined cyber security and digital forensics industry experience.

ConsenSys Diligence

CleanShot 2022-02-28 at 18.54.39.png

ConsenSys is a big name in the Ethereum industry. Founded by Ethereum co-founder Joe Lubin and offers various services to help secure blockchain applications, Ethereum smart contracts, tools for development, security, and infrastructure.

Auditing smart contracts through diligence is one of their products.

ConsenSys Diligence thoroughly identifies vulnerabilities in smart contracts through testing, audits, automated analysis, threat modeling, and much more. ConsenSys also offers various tools to audit and secure smart contracts on the Ethereum Chain.


cyfrin smart contract audits

Launched by blockchain YouTube educator Patrick Collins, the company is dedicated to the success of Web3 and helping push the security space forward.

The Cyfrin team has created some of the most watched educational videos of all time.

They are a team of superstar engineers and auditors, like:

They thrive on finding as many bugs and potential security threats as possible and finding ways to improve your codebase and test suite.

An audit is just part of the process of leveling up your entire engineering team at the same time.

Web3 security needs a new narrative, and they are excited to push the security space forward.

You can find a list of notable audits (and skillsets) for Cyfrin here, including the Beanstalk Wells integration and LinkPool.

Having launched in 2023, Cyfrin is a new entrant to the industry but has already established a stellar track record. If you're looking for a reliable and professional smart contract audit firm, Cyfrin is an excellent choice.



Hacken is a cybersecurity ecosystem founded by cybersecurity experts, Big Four professionals, and white hat hackers.

Since its inception in 2017, Hacken has been educating and growing the ethical hacker community and building Web 3.0 cybersecurity startups.

Clients include Solana, VeChain,, KuCoin, Huobi, 1inch, and Avalanche to name but a few. Hacken has helped protect clients' and users' assets worth more than $10 billion.

Hacken certification is accepted as a Web 3.0 security standard by Coingecko and Coinmarketcap.

One-stop solution service kit includes a smart contract security audit, KYC background check, pen tests, and Bug Bounty program.



Slowmist is a smart contract auditing firm based out of China. It was founded by an experienced team of attack-defense experts who transitioned into blockchain technology.

They’ve been a part of participating and setting up national and international standards for blockchain systems.

SlowMist offers smart contract auditing, defense deployment, vulnerability scanning, etc.

They also offer crypto and blockchain companies anti-money laundering (AML) services that regulators often require.


CleanShot 2022-02-28 at 18.56.16.png

QuillAudits is another new smart contract auditing firm specializing in auditing on multiple blockchain platforms.

They perform manual code reviews and automated testing for smart contracts before providing a comprehensive audit report.

Certik ???


In the first publication of this article, we had Certik way higher up on this list. But in June 2024, we reconsidered and started wondering if we should keep Certik on the list at all. But I believe it should be talked about.

Certik, historically has been the biggest name in the Smart Contract auditing industry. Established in 2018, the company was founded by professors from Yale University and Columbia University and as of 2023 has conducted audits for over 3,500 projects, rooted out over 60,000 findings, and secured more than $300 billion of assets. Certik is used by some of the largest DeFi protocols and exchanges such as Binance, OKEx, AAVE, Polygon and many more.

CertiK's reputation began to face challenges due to several high-profile security issues in recent years. One notable incident was the discovery of a $5 million security flaw in the Wormhole bridge on Aptos, which could have allowed attackers to create fake transactions and mint unbacked tokens on the Ethereum side of the bridge. This flaw, caused by an incorrect implementation of certain modifiers in the MOVE programming language, was reported and patched quickly by the Wormhole team, but it highlighted significant vulnerabilities​ (Cointelegraph)​.

There is a number of protocols audited by Certik that eventually got hacked and mentioned at least 7 times on Rekt Leaderboard.

On June 20th, they performed a series of controversial actions to uncover a bug in Kraken's security systems and shared it in this twitter thread. Three hours earlier, Kraken's Chief Security Officer, Nick Percoco, posted an update thread sharing the security vulnerability that was discovered. Read both threads and commentary. Draw your own conclusions.

Frequently Asked Questions

Q1. How much do smart contract audits cost?

Smart contract audits typically range from $5,000 to $15,000 but can be higher depending on the complexity of the code and the scope of the audit.

Q2. How much do smart contract security auditors make?

Salaries for smart contract security auditors vary based on experience, location, and the company they work for. Entry-level auditors might start around $70,000, while highly experienced professionals can earn well over $150,000.

Q3. How long does it take to audit a smart contract?

The timeframe for a smart contract audit can vary depending on the contract's size and complexity. A simple contract might take a week or two, while a more intricate one could take several weeks or even months.


An audit has become a hygiene factor in the web3 space, with several hacks and exploits in smart contracts every week.

The community demands that companies hire external parties to audit and secure their smart contract before deploying them. The good news is that there are so many options to choose from.

Check out the best crypto talent with Solidity Skills and the average salary for solidity developers. Alternatively, if you're looking for a job, check out the Solidity Jobs that are available right now.

Vignesh Selvasundar
Article by

I've been in crypto since 2015. CyberKongz NFT collectooor.

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