
1Security is a cybersecurity platform that enhances Microsoft 365 collaboration by providing clarity and control over permission management, sensitive data visibility, and automated security measures. The platform simplifies the management of permissions across resources, ensuring secure AI usage and collaboration with real-time rules and alerts. With a focus on empowering innovation rather than limiting it, 1Security addresses the challenges of modern collaboration by consolidating data protection into a unified platform, making it easier for organizations to secure their assets and streamline workflows. The company positions itself as a leader in the cybersecurity space, particularly for businesses utilizing Microsoft 365.

1Security is a cybersecurity platform that enhances Microsoft 365 collaboration by providing clarity and control over permission management, sensitive data visibility, and automated security measures. The platform simplifies the management of permissions across resources, ensuring secure AI usage and collaboration with real-time rules and alerts. With a focus on empowering innovation rather than limiting it, 1Security addresses the challenges of modern collaboration by consolidating data protection into a unified platform, making it easier for organizations to secure their assets and streamline workflows. The company positions itself as a leader in the cybersecurity space, particularly for businesses utilizing Microsoft 365.
What they do: AI-native permission manager that provides tenant-wide visibility and governance for Microsoft 365 (SharePoint, Teams, OneDrive).
Key use cases: Preventing oversharing, mapping permissions, monitoring permission changes, audit-ready reporting, and securing Copilot/AI access.
Location & founding: Founded Dec 2023; based in Łódź, Poland.
Founder: Adam Zaczek
Funding rounds: Pre-Seed (Feb 27, 2024) and Seed/Venture (Aug 22, 2025).
Investors: Sunfish Partners (Pre-Seed) and Digital Ocean Ventures Starter (lead, Aug 2025).
Permission sprawl and oversharing in Microsoft 365, lack of unified visibility for audits and investigations, and risks from AI/Copilot accessing exposed data.
2023
Cybersecurity
“Backed by Sunfish Partners (Pre-Seed) and Digital Ocean Ventures Starter (lead in Aug 2025).”