1Security Microsoft Copilot Security vs Theom: Side-by-Side Comparison (2026)

1Security Microsoft Copilot Security

Security teams deploying Microsoft Copilot across M365 need visibility into what data the AI can actually access before oversharing becomes a compliance liability, and 1Security Microsoft Copilot Security is built explicitly for that pre- and post-deployment control. The tool maps Copilot's permissions through Microsoft Graph, flags excessive access across SharePoint and OneDrive, and automates remediation of misconfigurations, addressing the asset management and data security gaps that most M365 tenants haven't solved yet. Skip this if your organization hasn't standardized on Microsoft's ecosystem or if you're looking for a Copilot governance tool that also covers other generative AI platforms; 1Security is Microsoft-only.

Theom

Mid-market and enterprise security teams drowning in data access sprawl across cloud and on-premises environments need Theom for its real-time identity and data flow mapping, which actually catches what's moving where instead of relying on static catalogs. The agentless architecture and Databricks Unity Catalog integration mean you get observable data lineage without the deployment overhead that kills most DSPM pilots. Skip this if you need a generalist data governance tool; Theom is built specifically for teams who treat data access control as a security problem, not an operational convenience.