[Your Trusted Security Partner]
Solving Security'sHardest Problems.
Vaultline (formerly 0xTeam) breaks smart contracts, applications, and infrastructure the way real attackers do, then helps you fix it.
Trusted By
Services
What We
Secure
Modern systems don't have a clean boundary between on-chain and off. We review the whole thing: the contract, the app that calls it, the AI that automates it, and the cloud it runs on.
Blockchain & Smart Contract Security
We review every layer of a blockchain system, from contracts and protocols to bridges and the off-chain services behind them, backed by Slither, Echidna, and Mythril.
Learn moreApplication Security
Code, API, cloud, and infrastructure review that traces every bug to the design flaw producing it, plus pentest, red team, and incident response when you need attackers, not auditors.
Learn moreAI/ML Security
We research and review AI systems in production: agent loops, model integrations, and the new attack surface where autonomous agents touch real funds.
Learn moreResearch & Development
Our research desk turns engagement findings into public write-ups, breach analyses, and tools, including Leon AI, our vulnerability-detection engine.
Learn moreProducts
Built In-House
AI Security Agent
Leon AI
Your Personal AI Security Agent
AI-powered vulnerability detection for smart contracts, EVM and non-EVM. Bug classification with severity scoring, code-quality assessment, remediation suggestions — built from patterns across 300+ audits.
Coming SoonAI Penetration Testing
AI Red Team
Adversarial testing for AI systems
Goal-based adversarial testing for AI systems — prompt injection, jailbreak paths, agent tool abuse, and model integration flaws. We attack your AI the way real adversaries do, before they get the chance.
Coming SoonCustomer Reviews
Why Clients
Trust Us
"Vaultline (formerly 0xTeam) provided us with a comprehensive audit that uncovered critical and hidden vulnerabilities. Their turnaround was fast, and communication was seamless. The team was highly professional and technically sound. We felt secure launching post-audit."
"The audit experience with Vaultline (formerly 0xTeam) was exceptional. Their findings were detailed, accurate, and easy to follow. They identified logic bugs others missed. Our smart contracts are now more robust thanks to their efforts."
"Working with Vaultline (formerly 0xTeam) was smooth from start to finish. Their security insights helped us fix serious issues early. Their report was thorough, and the post-audit call added great clarity. Definitely our go-to team for future audits."
"We needed a reliable audit before launch, and Vaultline (formerly 0xTeam) delivered. Their approach blended automation and manual review perfectly. The team was responsive, skilled, and security-focused. We gained major trust from users post-audit."
"We loved how hands-on Vaultline (formerly 0xTeam) was during our audit. They didn't just find issues — they educated us too. The report was actionable, clear, and helped our developers level up. Our product is now safer and play-ready."
Share your experience with Vaultline
Write a ReviewRecent Works
Featured Security
Reports
DZap
FunToken Multichain
Brain Frog
BigWater
Ecosystem
Partner
Network
Vaultline in the Spotlight
Press & News
Vaultline (formerly 0xTeam) joins the Polygon ecosystem to secure the future of Web3, one audit at a time.
Read article
Vaultline (formerly 0xTeam) partners with getWalletX to strengthen Web3 security across the ecosystem.
Read article
Vaultline (formerly 0xTeam) x Alchemy: collaborating in the same ecosystem to deliver best-in-class security solutions.
Read articleTalk to an Engineer,
Not a Sales Team.
Free 30-minute scoping call. Quote within 24 hours. NDA standard.