12 Best ZK-Rollup Protocol Audit Agencies In 2026

In this article, I’ll cover some of the top ZK-Rollup Protocol Audit Agencies that assist blockchain projects enhance security, dependability, and scale.

These agencies focus on smart contract reviews, zero-knowledge proof checks, vulnerability discovery, and Layer-2 protocol evaluations. Their skills let developers pinpoint security issues and create safer ZK-rollup options for the expanding Web3 environment.

Key Points

ZK-Rollup Protocol Audit Agencies	Explanation
OpenZeppelin	Provides secure smart contract audits and blockchain security solutions for ZK protocols.
Trail of Bits	Delivers advanced cryptographic audits, vulnerability research, and ZK-rollup security assessments.
CertiK	Uses AI-powered auditing tools for ZK-rollup protocol security verification.
Quantstamp	Conducts blockchain security audits focusing on scalable Layer-2 ZK solutions.
Consensys Diligence	Offers Ethereum-focused audits for ZK-rollups, smart contracts, and infrastructure.
Halborn	Provides cybersecurity audits, penetration testing, and cryptographic security reviews.
Hacken	Performs blockchain audits, including ZK-rollup protocols and Web3 applications.
Runtime Verification	Specializes in formal verification for secure ZK circuits and protocols.
Sigma Prime	Audits Ethereum-based systems with expertise in cryptography and Layer-2 security.
Least Authority	Provides privacy-focused security audits for zero-knowledge protocols and applications.

1. OpenZeppelin

Since its founding, OpenZeppelin has been one of the most popular names in blockchain security, offering smart contract auditing and security frameworks and tools for Ethereum.

The agency works with ZK-rollup projects to uncover potential issues for smart contracts and cryptography, governance, and Layer 2. The agency can guide projects looking to build ZK-protocols to design secure and scalable protocols.

Founder & Established: OpenZeppelin launched in 2015 by Manuel Araoz, Santiago Siri, and Demian Brener. Their OpenZeppelin Contracts library is extremely popular and used in virtually all Ethereum related projects to include smart contracts.

OpenZeppelin – Features

• Smart Contract Security Audits: Audit Ethereum smart contracts and ZK-rollups to indicate risks.
• Security Development Frameworks: Offers contract libraries to assist in developing safe applications on the blockchain.
• Layer-2 Protocol Reviews: Review ZK-rollup systems for security risks.
• Open-Source Security Tools: Widely adopted Web3 development tools include OpenZeppelin Contracts.
• Blockchain Security Experience: Audit DeFi, NFT, and Web3 projects with our cutting edge audit methodologies.

2. Trail of Bits

Trail of Bits is a company focused on survey level blockchain security and cryptographic advisory services within advanced Web3 systems.

Trail of Bits researches ZK-rollup systems by studying zero-knowledge circuits, smart contracts, consensus mechanisms, and other level 2 protocols. Their research focus makes them one of the most popular options for blockchain systems.

Founder & Established: Trail of Bits was founded in 2012 by Dan Guido and Alexander Sotirov. The company has a strong track record of security related engagements within the blockchain space and engage in significant research related to blockchain security.

Trail of Bits – Features

• Advanced Cryptographic Audits: Conduct security reviews of zero-knowledge proofs and architectures.
• Smart Contract Vulnerability Testing: Identify coding issues, blockchain application exploits, and bugs.
• Formal Security Research: Leverage the power of scientific theory to analyze complex systems.
• Protocol-Level Assessments: Consensus mechanisms and infrastructure systems, Layer-2 and decentralized systems.
• Open-Source Contributions: Develop security tools and resources for blockchain developers worldwide.

3. CertiK

CertiK offers security for Web3 using AI, automation, and audit technology to secure protocols. For ZK-rollups, CertiK offers smart contract auditing and other security services. Their technology seeks to enhance confidence prior to deployment to mainnet.

Founded in 2018 by Ronghui Gu and Zhong Shao.CertiK has audited thousands of blockchain projects and offers ongoing security monitoring through its Skynet platform.

CertiK – Features

• AI-Powered Security Analysis: Employ machine learning to find security issues.
• Automated Smart Contract Audits: Offer an efficient combination of security scanning technologies and manual reviews.
• Continuous Monitoring Solutions: Provide real-time security monitoring for blockchain projects.
• Penetration Testing Services: Test the security of ZK-rollups and Web3 applications.

4. Quantstamp

Quantstamp offers blockchain security audits, automated verification, and smart contract testing for decentralized applications (dApps). The organization assesses smart contract risks and the security of scalability and Layer-2 applications. The combination of automation and review by experts aims to guarantee the safety of the protocol.

Quantstamp was established in 2017 by Richard Ma and Steven Stuart. Quantstamp has secured hundreds of blockchain projects and developed technology for automated smart contract security validation.

Quantstamp – Features

• Automated Code Verification: Quantsamp’s tools can automatically identify problems with smart contract security.
• Blockchain Protocol Audits: Quantstamp will conduct audits for decentralized applications, Layer-2 solutions, and ZK-rollup architectures.
• Smart Contract Testing: Their testing is designed to identify vulnerabilities.
• Security Research Expertise: Quantstamp uniquely pairs automation with expert blockchain security analysis.
• Scalable Blockchain Protection: Quantstamp supports projects to enhance protocol safety while improving reliability and performance.

5. ConsenSys Diligence

ConsenSys Diligence is a division of ConsenSys focused on blockchain security auditing within the Ethereum ecosystem. It provides security assessments and audit services for smart contracts and decentralized applications built on ZK-rollups by analyzing contract logic and architecture and reviewing the security of the system. It provides services to launch Layer-2 solutions.

ConsenSys was established by Joseph Lubin in 2014. ConsenSys developed several Ethereum services such as MetaMask and Infura. The Diligence team has audited many Web3 protocols.

ConsenSys Diligence – Features

• Ethereum-Centric Security Reviews: Specialized audits are available for Ethereum based ZK-Rollups.
• Smart Contract Analysis: Evaluation of the logic of smart contracts, as well as the potential vulnerabilities and risks associated with their execution.
• Cryptographic Security Reviews: Assessments for the zero-knowledge techniques and blockchain security design.
• Layer-2 Infrastructure Testing: Evaluation of the decentralized applications and security of the scalability solutions.
• Web3 Ecosystem Knowledge: Deep Ethereum expertise developed from ConsenSys’ blockchain development.

6. Halborn

Halborn provides security services including blockchain, smart contract and cryptography audits, and security assessments for applications. Halborn assesses ZK-rollup security by examining smart contracts, wallets, and blockchain and cryptographic infrastructures on ZK-rollups.

Halborn’s methodology is based on combining manual testing with high-tech security research. Halborn was founded in 2019 by Rob Behnke and Steve Walbroehl. Halborn has worked with multiple blockchain companies, exchanges, and Web3 companies.

 Halborn – Features

• Blockchain Penetration Testing: Security testing of protocols to discover vulnerabilities and potential attack vectors.
• Cryptographic Security Reviews: Evaluations of the encryption systems and zero-knowledge techniques.
• Infrastructure Security Assessments: Auditing of wallets, bridges, and nodes, as well as related blockchain service offerings.
• Manual Security Assessments: Combines advanced analysis and cybersecurity methodologies.
• Web3 Protection from Threats: Supporting companies to protect their digital assets from new threats emerging from blockchain.

7. Hacken

Hacken is a Web3 cybersecurity firm that offers various solutions, including smart contract audits, penetration testing, and blockchain security solutions. Hacken reviews ZK-rollup protocols by assessing the risks in smart contracts, cryptographic elements, and decentralized applications.

Hacken’s security services help blockchain projects lower risk exposure before the general release. Hacken was founded by Dyma Budorin and Ihor Tymchyshyn in 2017. Hacken has undertaken hundreds of blockchain project security audits and runs the CER.live security ranking platform.

Hacken – Features

• Smart Contract Auditing: Analyzes blockchain code.
• Blockchain Security Testing: Provides penetration testing and risk assessments for Web3 projects.
• CER.live Security Rankings: Blockchain-powered assessments aim at bringing transparency to project security evaluations
• Cybersecurity Solutions: Works towards providing decentralized applications with the needed protection against potential attacks

8. Runtime Verification

Runtime Verification provides formal verification, smart contract analysis, and mathematical security validation for blockchain systems.

The company helps ZK-rollup developers employ sophisticated verification techniques to validate the correctness of zero-knowledge circuits and the behavior of the protocols. Runtime Verification’s main focus is the formal proof of the system correctness, rather than just identifying the vulnerabilities.

Runtime Verification was founded by Grigore Rosu in 2010. The company is the developer of the formal verification technology K Framework and other related technologies for the analysis of blockchain and software systems.

Runtime Verification – Features

• Formal Verification Services: Security and correctness for blockchain systems are mathematically proven
• Zero-Knowledge Circuit Analysis: Accuracy and reliability for complex ZK circuits are assessed
• Smart Contract Verification: Contract behavior is validated prior to blockchain deployment
• K Framework Technology: Blockchain protocols and software systems are analyzed using advanced tools
• Security Assurance Methods: This area of focus ensures the prevention of vulnerabilities by means of complete system verification

9. Sigma Prime

Sigma Prime is a blockchain security agency that offers smart contract reviews and cryptographic analysis, along with security assessments of Ethereum infrastructure.

Sigma Prime supports ZK-rollup initiatives by reviewing smart contracts, consensus mechanisms, and Layer 2 security components. Sigma Prime is known for its deep technical prowess in Ethereum protocol research and security.

Founder & Established: Sigma Prime was founded by Paul Hauner and Aditya Asgaonkar in 2016. The company contributed to the development of the Ethereum ecosystem and authored Lighthouse, a widely used Ethereum consensus client.

 Sigma Prime – Features

• Ethereum Security Audits: Ethereum-based protocols and applications undergo technical reviews
• Cryptographic Testing: The security and encryption of blockchain systems are assessed
• Layer-2 Security Assessments: ZK-rollup technology and scaling techniques are assessed
• Consensus Protocol Analysis: Reliability and vulnerability tests for blockchain consensus systems are performed
• Ethereum Research Expertise: Security of the blockchain ecosystem is improved through the expertise of the team

10. Least Authority

Least Authority works on privacy, security engineering, and auditing decentralized tech. They offer security assessments for zero-knowledge protocols, cryptographic tools, and Web3 layers. Their privacy-first approach assists ZK-rollups in bettering their data privacy and system reliability.

Founder & Established: Least Authority was founded by Zooko Wilcox and his team in 2011. The company has worked on a few privacy-oriented blockchain initiatives and is quite skilled in secure decentralized system design.

 Least Authority – Features

• Privacy-Focused Security Audits: Designed for privacy-centric blockchain applications
• Zero-Knowledge Protocol Testing: Improve privacy and security for ZK systems
• Cryptographic Application Reviews: Use a security-first approach for decentralized technologies
• Decentralized Infrastructure Audits: Blockchain systems, protocols, and Web3 applications are assessed
• Secure System Design: Privacy is preserved for resilient, decentralized systems

11. Zellic

Zellic specializes in zero-knowledge circuits, zkEVMs, and rollup technology. It provides code evaluations that consist of static and dynamic analysis augmented by manual code review and vulnerability research. Zellic reviews a variety of zero-knowledge circuits built with Circom and Halo2, including zkEVMs, zkVMs, privacy protocols, and interoperability layers.

Zellic has audited numerous major ZK and rollup projects such as Scroll. Zellic also audited zkEVM circuits and bridge and rollup contracts. There are Scroll audit reports and many other security assessments of protocols contained in Zellic’s public audit portfolio.

Features

• ZK Circuit Audits: Identify errors, vulnerabilities, and security issues in zero-knowledge circuits.
• zkEVM Audits: Assess zkEVM circuits, smart contracts, and related infrastructure for potential security risks.
• Rollup Security: Review Layer 2 and rollup code across protocol and application layers.
• Smart Contract Audits: Assess EVM-compatible smart contracts for logic, implementation, and security vulnerabilities.
• Cryptography Reviews: Evaluate cryptographic implementations and underlying security assumptions.
• Formal Verification & Fuzzing: Use advanced verification techniques and randomized testing to identify potential issues.
• Security Risk Assessment: Focuses on identifying and evaluating potential security risks across ZK, rollup, smart contract, and cryptographic systems.

12. zkSecurity

zkSecurity specializes in zero-knowledge proofs and security-related systems as well as cryptographic protocols and offers audits on ZK circuits, proving systems, and cryptographic constructs, smart contracts, and broader protocol construct designs.

For ZK-rollup protocols, zkSecurity assesses core components of ZK-rollup protocols which include transaction circuits, state transition logic, L1-L2 bridges, as well as proof verification and assumptions of the protocol. In the case of zkSecurity’s audit of Zeko, a zk-rollup protocol on Mina, zkSecurity reviewed both circuit level security and the design of the rollup protocol, and identified several serious design issues.

Key Features

• ZK Circuit Audits: Examine circuits for missing constraints, potential soundness issues, and vulnerabilities introduced during implementation.
• ZK-Rollup Audits: Evaluate rollup circuits, state transitions, bridges, and protocol logic for potential security issues.
• Cryptography Audits: Review cryptographic primitives, protocols, and their underlying security assumptions.
• Smart Contract Audits: Assess security-critical smart contracts that support ZK systems.
• Proof-System Reviews: Examine proving and verification system components for potential vulnerabilities.
• Protocol Security Research: Focuses on the security of ZKPs, MPC, FHE, and other advanced cryptographic technologies.
• Post-Audit Support: Provides follow-up assessments to verify that identified vulnerabilities have been addressed.

Conclsuion

Conclusion The most reliable ZK-Rollup protocol audit agencies are needed to build secure, scalable, and reliable Layer-2 blockchain solutions. Market leaders such as OpenZeppelin, Trail of Bits, CertiK, etc., offer comprehensive security audits, in-depth cryptographic assessments, and risk assessments.

These agencies assist developers in mitigating risks, enhancing zero-knowledge protocols, and constructing safer infrastructure within Web3 as the widespread use of ZK-rollups expands.

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