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C4 audit contests find more bugs faster than any other method.

Book an audit contest as soon as this month.
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Protect the DeFi ecosystem from threats by auditing code.


Create prize pools to attract wardens to audit their project.


Allocate awards to wardens based on performance.

$55,000 USDC (plus $20,000 in tokens) Livepeer contest

Decentralized live streaming platform built on the blockchain.

1 days + 00 57 49 until contest ends
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Upcoming Contests

$80,000 worth of ETH Sherlock contest

Decentralized exploit protection.

6 day contest

1 days + 00 58 49 until contest starts
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$50,000 USDC ElasticSwap contest

The first AMM for Elastic Supply Tokens.

6 day contest

1 days + 00 58 49 until contest starts
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$75,000 USDT OpenLeverage contest

Permissionless lending and margin trading protocol that enables traders to long/short any trading pair on DEXs efficiently and securely.

6 day contest

8 days + 00 58 49 until contest starts
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$90,000 USDC Behodler contest

Ethereum liquidity protocol powered by token bonding curves.

6 day contest

8 days + 00 58 49 until contest starts
View Contest
The crowd goes wild

This result far exceeded previous experiences I’ve had with 2–4 week-long audits by individual companies. I highly recommend the Code 423n4 competitive audit approach for anyone starting a new project.

LSDan ElasticDAO

Speaking of bold & ambitious security projects, another one is @code423n4 — "a community-driven approach to competitive smart contract audits," with sponsors like @SlingshotCrypto @maplefinance @NFTX_ & @yield.

It's a great place for aspiring auditors to compete & learn 🐞🧐🔐💰

RajΞΞv (@0xRajeev)

Great work everyone! This was a fantastic experience.

Ghoul.sol (@GhoulSol)

Overall, I have to say you guys have some very smart folks and some of the findings identified are quite good! Definitely a much better experience than the traditional audit we had gone through.


Amazing response for @code423n4 sponsorship. Great community @scott_lew_is @0xzak has built. This will change the future of the auditing industry.

Furthering deflationary $ETH on top of #eip1559 , I'll be sponsoring an additional 1000 VETH to wardens of @VaderProtocol https://t.co/99a9N0ZTAH

🔥Mervyn🔥 (@mervynchng89)

Awesome job wolf pack! 🐺 🐺 🐺

Special Thanks to @cmichelio @shw9453 @0xRajeev from @FairSideNetwork

You guys did NOT disappoint @0xzak @scott_lew_is Keep crushing it! 👏 👏 👏 https://t.co/RU2nSQCOxG

Brandon Brown 🔥 (@Brandon_FSN)

Want to give a massive shout out to all the wardens that took part in the Reality Cards contest last week- you guys found some really amazing stuff- so good that we're considering doing a second round! 🤣thanks so much guys!

AndrewReality Cards

Breadth and depth.

We got some wardens that looked at every line of the code for common mistakes. We got wardens that looked for economic attacks. We got trained auditors going by the book, and we got rookies with unbounded hunger to find bugs. I feel we got an excellent audit.

frob.eth | Alberto Cuesta Cañada (@alcueca)

And the results.

I can't give details yet, but there were two big issues that would have been fatal, about six that would have been uncomfortable, and about 30 that were just unaesthetic.

We got our money's worth. Don't go out into the wild without an audit. pic.twitter.com/DIm992DxNP

frob.eth | Alberto Cuesta Cañada (@alcueca)

C4 contests attract new, unique and complicated projects so it is a perfect learning opportunity... Here projects seriously invest in their security so it is always a motivation to try my best to find bugs in their code.

Pauliax/ThunderC4 Warden
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