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The OpenZeppelin Security Audit

Providing trust and confidence for leading Blockchain and Smart Contract systems

The OpenZeppelin Advantage

95%

Of our clients
hire us again

$50B+

TVL secured

1M+

LoC Reviewed

1000+

High and critical
vulnerabilities uncovered

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Securing the most critical protocols

Audits performed by us

19

High & critical vulns uncovered

5

Relationship started

2020

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Audits performed by us

4

High & critical vulns uncovered

3

Relationship started

2020

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Audits performed by us

2

High & critical vulns uncovered

1

Relationship started

2020

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Data collected as of December 31st, 2023

Audits performed by us

16

High & critical vulns uncovered

9

Relationship started

2022

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Audits performed by us

5

High & critical vulns uncovered

34

Relationship started

2022

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Audits performed by us

10

High & critical vulns uncovered

14

Relationship started

2023

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Data collected as of December 31st, 2023

Audits performed by us

44

High & critical vulns uncovered

19

Relationship started

2019

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Audits performed by us

3

High & critical vulns uncovered

0

Relationship started

2019

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Audits performed by us

2

High & critical vulns uncovered

2

Relationship started

2023

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Data collected as of December 31st, 2023

Audits performed by us

20

High & critical vulns uncovered

17

Relationship started

2020

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Audits performed by us

1

High & critical vulns uncovered

0

Relationship started

2022

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Data collected as of December 31st, 2023

Audits performed by us

3

High & critical vulns uncovered

7

Relationship started

2022

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Audits performed by us

1

High & critical vulns uncovered

0

Relationship started

2024

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Data collected as of December 31st, 2023

Audits performed by us

9

High & critical vulns uncovered

12

Relationship started

2021

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Audits performed by us

2

High & critical vulns uncovered

0

Relationship started

2023

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Data collected as of December 31st, 2023

Audits performed by us

2

High & critical vulns uncovered

0

Relationship started

2022

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Data collected as of December 31st, 2023

Audits performed by us

11

High & critical vulns uncovered

13

Relationship started

2023

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Audits performed by us

4

High & critical vulns uncovered

2

Relationship started

2021

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Data collected as of December 31st, 2023

The OpenZeppelin
client centered approach

Client Engagement
We communicate and collaborate with you in every stage to ensure both business and code objectives are achieved securely and efficiently.

Team Structure

  • 2+ Blockchain Security Researchers
  • Technical Manager
  • Project Manager

The team is supported by Cryptographers, Advanced Testing Engineer and Security Analyst based on the project requirements.

The OpenZeppelin client centered approach

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Step 1

Pre-Audit

Run Code Inspector on your code for free
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Step 2

Security Audit

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Step 3

Fix Review

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Step 4

Remaining on Top

Request a Security Audit

We protect decentralized systems (Language is your choice)

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solidity isotype

Solidity is the cornerstone of Ethereum smart contracts, powering decentralized applications (DApps) that redefine our digital world.

Trusted by

Uniswap Compound Optimism

OpenZeppelin’s Solidity difference

Our Solidity smart contract audits go beyond mere code review; they are a comprehensive safeguard for your DApp's integrity and user trust. With a meticulous blend of static analysis, manual inspection, and automated tools, we dissect every line of code to unearth vulnerabilities, review code design and system architecture, and ensure compliance with the latest Ethereum Improvement Proposals (EIPs). Let us fortify your Solidity contracts against the known and the unforeseen.

Trusted by

Uniswap Compound Optimism
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cairo

Cairo—a revolutionary language for creating provably secure smart contracts—brings about a new era of blockchain possibilities, including zk-Rollups and more efficient layer 2 solutions.

Trusted by

starknet snapshot

OpenZeppelin’s Cairo difference

Our Cairo smart contract audits are at the forefront of this innovation, offering specialized services to ensure your Cairo contracts are both powerful and impenetrable.

Some examples of issues found include severe protocol issues for Starknet including one which incorrectly allowed anyone to invoke functions only specific users should be able to, as well as a number of other issues such as in the case of the Snapshot protocol, regarding their voting system accounting as well as many others.

Trusted by

starknet snapshot
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rust

Rust's promise of memory safety and concurrency without compromise makes it a formidable choice for blockchain applications seeking unparalleled security and performance.

Trusted by

parity openbrush

OpenZeppelin’s Rust difference

Our Rust security audits and reviews harness Rust's strengths to secure your blockchain infrastructure, focusing on Layer 2 networks and other innovative platforms that push the boundaries of scalability and efficiency.

We also delve deep into the auditing of Zero-Knowledge Proofs (ZKP) and other cryptographic primitives, that leverage Rust's inherent safety features but also embody the cutting-edge of blockchain security techniques.

One of the noteworthy findings in this category is a bug which was found in the bus-mapping segment of the Scroll ZK system which could be exploited to censor transactions, impair the Sequencer's functionality, and potentially compromise the L2.

Trusted by

parity openbrush
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go

Go, with its simplicity and efficiency, powers some of the most critical infrastructure elements of blockchain networks.

Trusted by

mantle avalabs

OpenZeppelin’s Go! difference

Our Go audit service is designed to address the unique challenges of Go-based blockchain projects.

By combining thorough code reviews and security best practices, we ensure your system stands up to the demands of operational availability, scalability and security.

Trusted by

mantle avalabs

“Collaborating with OpenZeppelin on our security audit was a productive and positive experience. We appreciated their thoroughness and attention to detail.”

Yoav Weiss, Security at Ethereum Foundation

Compound

"OpenZeppelin has been perfoming excellent work on behalf of the protocol."

Robert Leshner, CEO at Compound

"We can't wait to see what developers are going to build on Base next, with additional peace of mind provided by OpenZeppelin."

Jessie Pollak, Lead at Coinbase