Deno offers a secure runtime environment for JavaScript and TypeScript, designed to prevent unauthorized access by default. It is compatible with Node.js, allowing easy integration of existing projects, and includes built-in tools for code quality. Deno also features a web framework called Fresh for seamless development on edge servers and a template app, SaaSKit, for building software-as-a-service applications. The company's goal is to provide developers with a user-friendly environment that enhances security and efficiency in application development.