Security that powers the world’s onchain financial system
From smart contracts to blockchain infrastructure and digital assets, OpenZeppelin delivers institutional-grade security at every layer of onchain finance.
Talk to a Security ExpertMore than
$250 billion+
in Digital Assets Secured
More than
10,000
Total Issues Uncovered
More than
700
Critical & High
Vulnerabilities Uncovered
Trusted by the world's leading financial institutions and blockchain protocols
Continuous Security Program
Security across the full lifecycle
The Continuous Security Program is our subscription-based engagement model that combines AI-native, agent-augmented workflows with a decade of OpenZeppelin security standards and expertise to deliver continuous security, compliance, and risk coverage across the full development lifecycle.
We design each engagement around what you actually need. Services from across the security lifecycle (Architect, Build, Secure, Support) are bundled into the right combination for your protocol, in an ongoing partnership that adapts as your system evolves.
Talk to a Security Expert → Read the announcement →
Architect
Validate the design and identify risks before code is written
Architecture Review
Validate your system architecture early to prevent costly vulnerabilities later. Early-stage reviews of design diagrams, data flows, and upgrade mechanisms identify architectural weaknesses and improve security modularity before implementation—reducing reworks and accelerating audit readiness.
Talk to a Security Expert →
Threat Modeling
Identify what attackers will target before they do. Adversarial analysis of your proposed architecture, trust boundaries, and failure modes—translated into tailored incident response processes and concrete risk priorities your team can act on.
Talk to a Security Expert →
Standards & Regulatory Review
Map your design against applicable standards and regulatory frameworks before you build. Reviews against ISO, NIST, MiCA, DORA, Basel, and regional frameworks confirm your system meets institutional and supervisory requirements from day one—reducing compliance risk later in the lifecycle.
Talk to a Security Expert →
Applied Research
Collaborate with OpenZeppelin's researchers to validate new mechanisms and architectures. We model your system under adversarial conditions, applying formal and empirical methods to ensure correctness, efficiency, and resilience at scale.
Talk to a Security Expert →
Governance Design
Design safe upgrade mechanisms, multisig policies, timelocks, and emergency procedures. We help you build governance that protects against operational mistakes and adversarial conditions, with clear procedures for the moments that matter most.
Talk to a Security Expert →Cryptographic Design Review
Validate the choice and composition of cryptographic primitives in your system, including ZK and MPC schemes. Our cryptographers review your designs for soundness, efficiency, and resilience before implementation locks in costly mistakes.
Talk to a Security Expert →
“Huge thanks to OpenZeppelin for being a great partner during the security audit — their expertise and constant support were invaluable for the entire engagement."
Director of Blockchain Engineering, DTCC
Build
Reach production with secure foundations
Blockchain Library Development
Extend the security standards behind OpenZeppelin Contracts with custom reusable libraries built for your platform. Production-ready code derived from the patterns trusted by 9 of the top 10 stablecoins and 10 of the top 10 tokenized funds by market cap.
Talk to a Security Expert →
Reference Implementations
Production-ready blueprints for tokenization, stablecoins, and institutional DeFi—working code, threat models, and institutional evaluation guides that compress time to market while preserving security and compliance posture.
Talk to a Security Expert →
Custom Platform & Solution Development
Purpose-built platforms and financial solutions engineered to your requirements. From custom L1s and L2s to tokenization platforms, tokenized funds, and product extensions, our team designs and builds production systems aligned to your business and regulatory needs—informed by our work with leading financial institutions and digital asset issuers.
Talk to a Security Expert →Standards Development
Co-author and implement the token, compliance, and governance standards that regulators and ecosystems will rely on. OpenZeppelin contributes to defining blockchain security standards, not just following them.
Talk to a Security Expert →
“With OpenZeppelin’s open source tools, Stellar developers can build faster while hardening security for their onchain apps”
Senior Product Manager, Stellar
SECURE
Catch vulnerabilities across code, infrastructure, and operations
Smart Contract Security Audit
Secure your onchain application code with the gold-standard smart contract audit. Our security researchers conduct a line-by-line review to identify vulnerabilities, logic flaws, and upgrade risks before deployment. Trusted since 2016 as the first smart contract auditing firm.
Learn More → Request a Quote →
Blockchain Infrastructure Audit
Validate the integrity and reliability of your blockchain infrastructure. We assess consensus mechanisms, node software, bridges, and rollup components to identify design flaws and implementation risks across complex architectures like OP Stack, Geth, and Cosmos SDK.
Talk to a Security Expert →
Zero-Knowledge Proof Audit
Ensure the correctness and soundness of your ZK systems. Our cryptographers review circuits, verifiers, and proofs for implementation accuracy, efficiency, and security across zkEVMs, provers, and privacy protocols.
Learn More → Request a Quote →
Technical Risk Assessment (TRA)
Evaluate stablecoins, tokenized assets, and digital securities with institutional-grade risk analysis. TRA assesses blockchain infrastructure, smart contract security, collateral quality, and operational controls—delivering standardized A-F ratings to support listing, custody, investment, and compliance decisions.
Talk to a Security Expert →
Penetration Testing
Test your systems under real-world attack conditions. Simulated attacks target your applications, APIs, backends, and networks to identify exploitable weaknesses before attackers find them. Receive a prioritized remediation roadmap with actionable steps to harden your security posture.
Talk to a Security Expert →Operational Security Assessment
Assess and strengthen the operational layer behind your smart contracts. We evaluate key management, deployment workflows, upgrade governance, and access controls to close gaps and harden the day-to-day processes that protect your systems and assets.
Talk to a Security Expert →
Deployment Verification
Collaborative design and research with your protocol team. Verify that what you deploy matches what was audited. Deployed bytecode, parameters, and configurations are validated to guarantee production alignment and prevent post-audit drift.
Talk to a Security Expert →
“Collaborating with OpenZeppelin on our security audit was a productive and positive experience. We appreciated their thoroughness and attention to detail.”
Security, Ethereum Foundation
Support
Keep production systems
secure over time
Continuous Support & Maintenance
Ensure stability and security of foundational infrastructure components with guaranteed SLAs, proactive security patches, maintained versions, and direct engineering access.
Talk to a Security Expert →
Custom Monitoring Solution
Detect threats in real time and respond proactively using tailored monitoring built on OpenZeppelin's expertise and tooling. All major blockchain networks supported.
Talk to a Security Expert →
Designated Blockchain Security Architect
Embedded security partnership providing ongoing guidance, architecture reviews, and strategic support aligned to your roadmap. Your security advisor over time, not just your auditor.
Talk to a Security Expert →Security Training & Enablement
Build durable in-house security capability across your organization. From blockchain fundamentals and smart contract security workshops to incident response simulations and executive briefings, we deliver tailored programs that grow your team's expertise alongside your systems.
Talk to a Security Expert →
"The OpenZeppelin team was collaborative, and deeply knowledgeable. They took the time to understand our use case and made meaningful contributions throughout the process."
Head of Product in Digital Assets, WisdomTree
Enterprise-Grade Compliance & Certifications
OpenZeppelin meets the highest standards of security and operational integrity, with frameworks designed for institutional adoption.
