[Contracts, Bridges & Nodes]
Blockchain &
Smart Contract
Security
We review complete blockchain systems: contracts, protocols, bridges, and the off-chain services that connect users to funds.
Quote within 24 hours.
Why Vaultline
What Sets Us Apart
[ Unmatched Expertise ]
Our team of seasoned blockchain engineers and security experts have years of experience in the industry, ensuring the highest level of expertise in smart contract auditing.
[ Rigorous Auditing ]
Our comprehensive auditing process includes thorough code review, automated testing, and manual inspection to identify and address even the most subtle vulnerabilities.
[ Transparent Reporting ]
We provide detailed, easy-to-understand audit reports that clearly outline findings, recommendations, and remediation steps, ensuring complete transparency throughout the process.
What You Get
Services & Deliverables
Design Assessment
Design Assessment
Pre-code architecture review during your design phase, before flaws get expensive.
- 01Deployment-plan and incident-response risk analysis
- 02Oracle & DeFi integration risk assessment
- 03Upgrade-path, admin-key, and access-control review
- 04Testing-strategy guidance (fuzzing, static analysis)
Outcome: catch architectural flaws while they're still a diagram, not a redeploy.
Flagship
Comprehensive Audit
Manual line-by-line review combined with automated analysis and PoC exploits for every serious finding.
- 01Multi-language contract & protocol analysis: Solidity, Rust, Go, Move, Cairo
- 02Economic risk: price manipulation, liquidation paths, MEV exposure
- 03Bridge & cross-chain transaction validation review
- 04Severity-ranked findings with runnable proof-of-concept exploits
- 05Fix verification and final public report
Featured reports: DZap (98.8), FunToken Multichain (98)
Protocol & Node Review
Protocol & Node Review
Consensus mechanisms, governance systems, node integrity, and cross-chain infrastructure for chains, L2s, and bridge operators.
Retainer
Continuous Security
Every upgrade reviewed before it ships, with ongoing coverage as your protocol evolves.
Methodology
[ Audit
Approach ]
A structured, seven-step process that leaves no surface unexamined, from the first line of code to the final public report.
Manual Review
Line-by-line analysis by senior auditors.
Vulnerability Analysis
Known classes + business-logic and economic attack paths.
Automated Analysis
Slither, Echidna, Mythril tuned to your codebase.
Initial Report
Severity-ranked findings with PoCs.
Dev Revisions
Your team patches with our guidance.
Fixed-Code Analysis
Every fix re-tested.
Final Public Report
Published to GitHub.
Coverage
Ecosystem We Secure
Languages
Language We Audit
Recent Works
Featured Security
Reports
DZap
FunToken Multichain
Brain Frog
BigWater
Research
Research From This Practice
Customer 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."
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