# Zellic > Zellic is a smart contract and blockchain security firm. We provide security audits, vulnerability research, and assessments for blockchain protocols, DeFi applications, and decentralized systems. ## Main Pages - [Services](https://www.zellic.io/services): Security audit services and research offerings - [Our Work](https://www.zellic.io/our-work): Portfolio of completed security audits and engagements - [Team](https://www.zellic.io/team): Zellic's security researchers and team members - [Research](https://www.zellic.io/blog): Security research blog covering smart contracts, cryptography, DeFi, and blockchain vulnerabilities - [Contact](https://www.zellic.io/contact): Get in touch with Zellic for an engagement ## Optional - [Research blog sitemap](https://www.zellic.io/blog/sitemap.xml) - [Security audit reports sitemap](https://reports.zellic.io/sitemap.xml)