# SigIntZero

> Blockchain security firm: smart contract audits, DeFi security, and Web3 infrastructure assurance for Layer 1s, protocols, and Web3 projects. Human-led audits backed by Sentinel, our in-house automated analysis engine.

## Products

- [Sentinel](https://sigintzero.com/sentinel): Fully automated, self-serve AI analysis engine for smart contracts. Returns severity-rated findings with root-cause analysis and remediation, on demand. Sentinel output is automated analysis. A full audit additionally includes human-led review.
- [Tripwire](https://sigintzero.com/tripwire): 24/7 on-chain monitoring and automated threat response for deployed contracts.

## Services

- [All security audit services](https://sigintzero.com/services)
- [Solidity / EVM audits](https://sigintzero.com/services/solidity-audits)
- [Rust & Solana program audits](https://sigintzero.com/services/rust-audits)
- [DeFi security audits](https://sigintzero.com/services/defi-security-audits)
- [Bridge audits](https://sigintzero.com/services/bridge-audits)
- [Formal verification](https://sigintzero.com/services/formal-verification)

## Pricing

- [Pricing](https://sigintzero.com/pricing): Sentinel automated scans from $100; human-led audits scoped per engagement (from $5,000); Tripwire monitoring from $2,500/mo.

## Research

- [Security research blog](https://sigintzero.com/blog): Original 2026 exploit forensics and audit guidance.
- [What a smart contract audit costs in 2026](https://sigintzero.com/blog/smart-contract-audit-cost-guide)
- [How to choose an audit firm](https://sigintzero.com/blog/how-to-choose-audit-firm)
- [What to expect from an audit report](https://sigintzero.com/blog/what-to-expect-audit-report)

## Contact

- [Contact](https://sigintzero.com/contact)
- Email: contact@sigintzero.com