Sidian is a B2B SaaS company building Dataguard, a contextual AI platform that automates data compliance for organizations that handle sensitive information. Dataguard integrates natively into Microsoft 365 workspaces, applying organization-defined dynamic policies to automatically detect and redact restricted entities before documents are shared, with full audit logging and zero-trust data processing built in. The need is acute in sectors where a single mishandled document carries serious legal and regulatory consequences. In law firms, Dataguard prevents the inadvertent disclosure of privileged client information, opposing counsel details, and case-sensitive data during document review and sharing. In healthcare and other vulnerable sectors, it enforces compliance with PIPEDA, HIPAA, and provincial privacy regulations by automatically stripping patient identifiers, diagnoses, and protected health information before they leave the organization's control. Unlike enterprise tools such as Microsoft Purview, which require significant IT overhead and licensing investment, Dataguard is purpose-built to be affordable, fast to deploy, and immediately usable by non-technical staff. Founded by a team with hands-on experience building automated redaction systems for Canadian intelligence services, Sidian brings deep founder-market fit to a compliance problem that affects thousands of professional practices across North America.