Hexens is a blockchain security firm founded in 2021, headquartered in London. The company's threat model is specific: defending smart contracts, protocols, and the cryptographic underpinnings of decentralized systems where a single flaw can mean irreversible loss. They operate across blockchain security, cryptography, code review, and autonomous AI, applying those disciplines to protect critical digital infrastructure.
The team is composed of senior security researchers, including CTF champions and bug bounty leaderboard veterans. Their operational structure is built for redundancy - two independent security teams work in parallel on every engagement, cross-checking findings. The approach has yielded over 300 completed engagements, securing over $120 billion in digital assets, with a 91% client retention rate and a track record of zero post-audit exploits.
Their audits surface real problems: 90% of reports have contained critical or high-severity findings. Hexens closed a $4.2 million seed round to scale this work. The core technical domains - blockchain security, cryptography, and autonomous AI - reflect a focus on systems where the stakes are absolute and the attack surface is novel.
