Security for systems that cannot afford to make mistakes.

Hexens is the go-to security firm for projects that cannot afford a single mistake. Our security and R&D team consists of CTF champions, bug bounty leaderboard veterans, and world-class vulnerability researchers — the people other firms benchmark against. We build the security technology the industry uses: Glider, Remedy, Token Risks API. We publish the vulnerability research the industry cites. And we run the audits that protect it — two independent teams per engagement, the full security engineering toolchain, a zero-exploit track record across 300+ engagements and $120B+ in protected assets.

The result. Zero post-review incidents. While this can be just luck for the first year, after 5 years and hundreds of engagements with the most targeted code in the industry, this is consistency. The results are backed by the people. Our security and R&D team is comprised of CTF champions, bug bounty leaderboard veterans, and hackers with track records of breaking systems that were considered unbreakable. Combined with the methodology, every engagement gets two independent security teams working on the scope. Exclusive focus augmented by the full security engineering toolchain (including professional AI-augmentation).

A smart contract audit is a systematic security review of blockchain-based code — designed to surface vulnerabilities, logic errors, access control flaws, and exploitable edge cases before deployment. At Hexens, this means rigorous line-by-line manual review by senior engineers, supported by proprietary tooling and our dual-team methodology. The goal: code that cannot be broken.

The full blockchain and general security surface. Smart contract audits across every language and chain. L1/L2 and cross-chain protocol reviews. Zero-knowledge circuit and FHE security audits. Centralized exchange and wallet assessments. Full-stack penetration testing. DevSecOps consulting. Social engineering simulations. AI/ML security reviews. Plus proprietary security products: Glider for on-chain intelligence, Remedy for bug bounties, and Token Risks for real-time risk analysis. If it touches value or processes trust, we secure it.

Every audit is performed by humans, and no single team — no matter how skilled — catches everything. A second review with a fundamentally different methodology reduces that margin of error. Two different teams, two different approaches, two different sets of assumptions being challenged. 90% of our reports surface critical or high-severity findings — and some of those codebases had already passed a previous audit. A second opinion from a team with a zero-exploit track record isn't redundant. It's how serious engineering teams manage risk.

A ZK audit is a specialized security review of zero-knowledge circuits, proving systems, and associated cryptographic implementations. ZK circuits are structurally more prone to critical bugs than standard smart contracts — industry data shows ZK audits are approximately twice as likely to uncover critical-severity findings. Hexens audits ZK implementations across Circom, Halo2, Plonky2/3, and other proving frameworks, with particular focus on underconstrained circuits, cryptographic primitive validation, and proof soundness.

Web3 penetration testing is offensive security assessment designed for decentralized applications and blockchain infrastructure. It covers smart contract interactions, wallet integrations, API surfaces, on-chain/off-chain communication layers, and blockchain-specific attack vectors that traditional pentesting frameworks don't address. Hexens performs comprehensive penetration tests across DeFi platforms, centralized exchanges, DAOs, and other blockchain applications.

Timelines depend on scope and complexity. A focused Solidity smart contract audit typically takes 2–4 weeks. L1/L2 protocol reviews, ZK circuit audits, and comprehensive exchange assessments take longer. Hexens provides a clear timeline during scoping — and we don't run parallel engagements that dilute focus or delay delivery.

Effective security is layered: smart contract audits before deployment, full-stack penetration testing, DevSecOps integration, team training against social engineering, a live bug bounty program, and continuous monitoring. Most projects do one or two of these. The ones that survive long-term do all of them. Hexens covers the full lifecycle — audits, advisory, Remedy bug bounties, and Glider-powered on-chain intelligence.

The primary security frameworks applicable to blockchain include the NIST Cybersecurity Framework, OWASP Smart Contract Top 10, ISO/IEC 27001, MITRE ATT&CK (adapted for blockchain threat modeling), and CIS Controls. Hexens integrates these frameworks into our audit methodology and security advisory, ensuring assessments meet and exceed industry compliance standards.

Yes. Most of our clients work with Hexens continuously — across multiple codebases, protocol upgrades, and new product launches. Our 91% retention rate reflects the compounding value of a long-term security partner over one-off audits. Ongoing engagements include recurring audits, continuous advisory, Remedy bug bounty management, and Glider-powered monitoring.