Full-stack Web2 & Web3 security
Full-stack Web2 & Web3 security
Smart contract audits, web and cloud penetration tests, and threat modeling, delivered by researchers with more than a thousand critical and high-severity findings.
Kickoff within 48 hours of scope approval
- Total value secured
- $5B+
- Security engagements
- 100+
- Critical & high findings
- 1,000+
- CVEs found
- 100+
Projects we've helped secure
Services
Audits across every layer you ship.
One team for the contracts, the app around them and the cloud underneath, so the bugs between layers get found too.
- 01Fullstack AuditsFrontend, backend, APIs, databases and infrastructure, tested end to end.
- 02Smart Contract AuditsLine-by-line review, fuzzing and formal verification for Solidity, Rust and Move.
- 03Fullstack Threat ModelingA three-day engagement that maps your attack surface and prioritises risk.
- 04dApp AuditsWallet connections, transaction flows and Web3 integrations under attack.
- 05Infra AuditsCloud, container, CI/CD and blockchain node security across AWS, Azure and GCP.
- 06Wallet AuditsKey management, signing flows, extensions and multi-sig implementations.
Why Valkyri
Security work that holds up in production.
Hybrid Web2 + Web3 team
The same researchers audit smart contracts and break web apps, APIs and cloud, so integration bugs between layers don't fall through the cracks.
Manual first, tooling backed
Line-by-line review, stateful fuzzing and formal verification, with findings shared continuously on a private board while the audit runs.
Fast, accountable delivery
Kickoff within 48 hours of scope approval, fix reviews included, and a final report written for both engineers and stakeholders.
Team
Lead security researchers.
Every engagement is run by the people below, not handed to a junior bench.
0xaudron
Co-founder · Lead Security Researcher
Smart contracts, blockchain infrastructure, web applications, APIs and network security.
- Experience
- 7+ years
- Focus
- Smart contract security
- Track record
- 500+ valid vulnerabilities
Security researcher with 7+ years across smart contracts, blockchain infrastructure, web applications, APIs and network security testing. Has identified and reported 500+ valid vulnerabilities across bug bounty programs and audits, earning multiple CVE credits.
- Smart contracts
- Blockchain infrastructure
- Web applications
- APIs
- Network security
Team certifications
Kvazar · AI audit agent
Machine patience, researcher judgement.
Kvazar pairs expert manual audits with its own AI audit agent. It reads the whole codebase, builds a threat model and triages candidates by severity, and every finding ships with proof.
- Scans every contract on every commit
- Severity triage with reproduction steps
- A researcher signs off on every finding
1contract Vault {2 mapping(address => uint256) public balances;3 address public owner;45 function withdraw(uint256 amount) external {6 require(balances[msg.sender] >= amount);7 (bool ok, ) = msg.sender.call{value: amount}("");8 balances[msg.sender] -= amount;9 }1011 function setOwner(address next) external {12 require(tx.origin == owner);13 owner = next;14 }15}- F-01CriticalReentrancy: external call before state updateL7
- F-02MediumLow-level call result is never checkedL7
- F-03HighAuthorization via tx.originL12
Human-verified · sample contract, not client code
Our promise
Build what's next. We'll stand guard.
Request an audit, or book a 30-minute call with a lead researcher to scope your engagement.