Curated list of the top 30 cloud storage services that emphasize strong security and fine‑grained access‑control features.
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Enterprise‑grade storage with advanced sharing settings, domain‑wide access policies, and per‑file permission levels (view, comment, edit).
Integrated with Microsoft 365, offers conditional access, sensitivity labels, and detailed sharing permissions per user or group.
Provides team folders, link expiration, password protection, and granular admin controls over file and folder permissions.
Enterprise content platform with role‑based access, granular collaboration permissions, and robust data‑loss‑prevention policies.
Hybrid cloud storage with detailed folder‑level permissions, user‑based policies, and integration with SSO/MFA.
Secure file sharing with customizable permission sets, audit trails, and granular control over external collaborator access.
End‑to‑end encrypted storage offering per‑file access rights, password‑protected links, and detailed permission hierarchies.
Zero‑knowledge cloud storage with folder‑level permissions, link expiration, and granular sharing controls.
Offers encrypted storage with fine‑grained folder permissions, team member roles, and link‑level security settings.
Zero‑knowledge backup and sync with detailed sharing permissions and encrypted access controls.
Object storage with AWS Identity and Access Management, allowing per‑bucket and per‑object permission policies.
S3‑compatible storage with IAM‑based access controls and bucket‑level permission granularity.
Provides bucket policies and application keys for fine‑tuned read/write permissions on objects.
Enterprise object storage with IAM roles, bucket policies, and detailed access control lists.
Offers compartment‑based policies, IAM, and object‑level ACLs for precise permission management.
Supports RAM policies, bucket ACLs, and fine‑grained permission settings for objects and directories.
Zero‑knowledge cloud storage with per‑folder encryption keys and detailed sharing permissions (read/write, expiration).
Secure backup and sync with role‑based access, folder permissions, and granular sharing links.
Team workspace with folder‑level permissions, custom roles, and detailed audit logs.
Open‑source platform offering per‑file/folder ACLs, group permissions, and extensive sharing controls.
Self‑hosted storage with granular sharing options, role‑based access, and enterprise security plugins.
File sync & share solution with library‑level permissions, detailed user/group rights, and encryption.
Russian cloud storage offering folder sharing with read/write controls and link expiration.
Object storage with CDN, Swift API, and role‑based access policies for fine‑grained control.
S3‑compatible object storage with ACLs and scoped access keys for precise permission handling.
Supports Azure AD RBAC, SAS tokens, and container‑level ACLs for detailed access management.
IAM roles, bucket policies, and object ACLs enable granular permission settings across projects.
Adds client‑side encryption to existing cloud services with per‑folder keys and sharing permissions.
Secure multi‑cloud storage hub with folder‑level sharing, password protection, and expiration dates.
Document management with metadata‑driven permissions, role‑based access, and detailed audit trails.
Business cloud storage featuring granular folder permissions, user roles, and secure sharing links.
Add‑on to pCloud that provides client‑side encryption and per‑folder access controls for ultra‑secure sharing.