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HYDN

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OverviewOfferingsReview

Overview

HYDN is a cybersecurity and blockchain security specialist firm founded in 2021, providing comprehensive security services to Web3 and traditional organizations. With over 50 years of combined expertise from their founding team, HYDN has established itself as a trusted partner for companies building secure digital infrastructure.

Core Services

HYDN delivers a comprehensive suite of security services across three primary verticals: Cybersecurity, Blockchain Security, and Solutions Design. Their smart contract auditing service has earned recognition from industry leaders including MetaMask, a16z, Bittrex, and Sablier. The team specializes in manual, in-depth audits for EVM-compatible blockchains, distinguishing themselves through deep project understanding rather than automated tool reliance.

Their Advanced Adversarial Simulation (Red Team) service is particularly noteworthy, with the team bringing decades of experience combating Advanced Persistent Threat (APT) groups such as Lazarus Group, Kasablanka, and MuddyWater. HYDN's Web3 Penetration Testing extends beyond traditional network and application testing to include middleware security and anti-tampering measures specific to blockchain components.

Key Strengths

HYDN's team holds prestigious certifications including CISSP, CCNP, GCIH, GREM, and GNFA. Their cybersecurity credentials include involvement in uncovering major incidents such as the Olympic Destroyer hack in 2018. In the Web3 space, HYDN won the EthernautDAO CTF Hacking Challenge 2022, successfully hacking smart contracts twice in under 5 minutes, and their Lead Auditor placed as the highest solo competitor in Paradigm CTF 2023.

The firm's multi-disciplinary approach enables them to serve organizations ranging from early-stage startups to multi-billion dollar enterprises. Their methodology emphasizes thorough understanding of each client's specific goals, allowing them to identify attack vectors that general security assessments might miss. HYDN's solutions delivery service goes beyond coding and design to provide bespoke architecture and engineering that aligns with security, compliance, and performance requirements.

Notable Clients and Expertise

HYDN has worked with prominent Web3 projects including Metamask, Consensys, a16z, Telos Foundation, Bittrex Global, Sushi, Sablier, Revert, Rapid7, Decubate and many more.

The team specializes in protecting high-value digital assets against evolving threats, particularly those from sophisticated APT groups that have stolen over $7 billion from the cryptocurrency industry.

Why Choose HYDN

Organizations choose HYDN for their hands-on, personalized approach to security. Rather than relying heavily on automated tools or applying generic attack vector testing, HYDN takes time to understand each project's objectives and technical architecture. This consultative approach, combined with deep expertise in both traditional cybersecurity and Web3-specific threats, positions HYDN as a strategic security partner for ambitious leaders who view cybersecurity as critical to their business success. Their track record of identifying vulnerabilities that other auditors miss, proven through CTF competition wins and real-world engagements, demonstrates their capability to protect organizations that cannot afford to get security wrong.

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Verified Partner

This partner has been verified by Web3Connect on 20 Apr 2026

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Smart Contract AuditingThreat Intelligence

About

Company Information

Founded

2021

Team Size

16-20 employees

Website & Social

www.hydnsec.comLinkedInX (Twitter)

Operations & Coverage

Support Hours

London8am - 8pm GMT

Coverage

Worldwide

Languages

English(primary)FrenchSpanish

Interested in working with HYDN?

Get in touch to discuss your needs and explore how HYDN can help.

Offerings

Professional Services

Smart Contract Audits

HYDN provides industry-leading manual smart contract audits for EVM-compatible...

#154 in Smart Contract Auditing

Penetration Testing

Real attackers don't wait for your next audit cycle. Our penetration testing puts your...

#84 in Threat Intelligence

Location(s)

Headquarters

128 City Road, London, EC1V 2NX, London, United Kingdom

Team Size: 10-15 employees

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