Tresorit

Tresorit
Name	Tresorit
Type	Private
Industry	Cloud storage
Founded	2011
Founders	Istvan Lam, Szilveszter Szebeni, Gyorgy Szilagyi
Headquarters	Budapest, Hungary
Key people	Istvan Lam, Szilveszter Szebeni
Products	Encrypted cloud storage, file sharing, collaboration

Tresorit Tresorit is a European end-to-end encrypted cloud storage and file sharing service founded in 2011. The company provides client-side encryption and secure collaboration tools aimed at enterprises, small and medium-sized businesses, and privacy-conscious individuals. Tresorit positions itself within a landscape of Microsoft-era cloud services, competing with providers such as Dropbox, Box, and Google Drive while emphasizing cryptographic protections similar to projects like Proton Mail and Signal.

History

Tresorit was established in Budapest by entrepreneurs with backgrounds in software engineering and cryptography during the aftermath of the 2010s surge in cloud computing adoption. Early development coincided with public debates following the Edward Snowden disclosures and the passage of legislation such as the USA PATRIOT Act and debates around the EU–US Privacy Shield. The company attracted attention alongside European privacy-focused firms including StartMail, Proton AG, and Nextcloud. Tresorit expanded operations into Western Europe and North America, engaging with regulatory frameworks like the General Data Protection Regulation and seeking certifications such as ISO/IEC 27001. Over time Tresorit pursued partnerships and integrations with enterprise platforms including Microsoft 365, Salesforce, and Slack while navigating market competition from legacy vendors such as Apple Inc. and newer entrants like Boxcryptor.

Features and technology

Tresorit offers features tailored to secure collaboration, including end-to-end encrypted file synchronization, link-based sharing with expirations, granular access controls, and enterprise administrative tooling. The client architecture supports background synchronization similar to solutions from Synology and integrates with identity providers such as Okta and Azure Active Directory. For collaboration, Tresorit provides role-based permissions that echo patterns used by Atlassian products and file versioning comparable to Git workflows in a file history context. The service also includes selective sync, offline access, and mobile editing workflows akin to those in Microsoft Office and Google Workspace, while attempting to maintain cryptographic guarantees promoted by academic projects from institutions like MIT, Stanford University, and ETH Zurich.

Security and encryption

Tresorit centers on client-side, end-to-end encryption using symmetric and asymmetric primitives informed by cryptographic research at laboratories such as NIST and academic groups at University of Cambridge and University of Oxford. Key management is designed to limit server-side access, paralleling models used by Proton Mail and Tutanota. Tresorit has commissioned third-party security audits from firms comparable to Kaspersky Lab and Veracode and engaged with disclosure programs resembling HackerOne or Bugcrowd. The platform has had to address vulnerability classes documented by researchers from Google Project Zero and cryptographic advisories from CERT‑EU. Compliance mappings have been produced to align with frameworks like SOC 2 and ISO/IEC 27001, mirroring practices used by IBM and Amazon Web Services in their security documentation.

Platforms and interoperability

Clients are available for desktop operating systems including Microsoft Windows, macOS, and distributions of Linux, and mobile apps for Android and iOS. Tresorit integrates with productivity ecosystems such as Microsoft Office 365 and supports file access patterns similar to WebDAV and synchronization behaviors found in rsync-based tooling. Enterprise interoperability includes connectors for Microsoft Exchange Server, identity federation via SAML and OAuth, and API compatibility for services used by Salesforce, SAP SE, and Oracle Corporation deployments. Cross-platform encryption key handling follows patterns discussed in standards bodies like IETF and tooling communities around OpenSSL.

Business model and pricing

Tresorit markets subscription tiers for individuals, teams, and enterprises with per-user pricing, storage quotas, and administrative controls comparable to Box and Dropbox Business. Pricing plans include features such as audit logs and enterprise key management that appeal to regulated sectors like firms subject to HIPAA-style requirements and industry verticals represented by Deloitte, PricewaterhouseCoopers, and KPMG in procurement evaluations. The company has offered trial accounts and freemium entry points analogous to strategies used by Atlassian and Slack Technologies, while enterprise offerings include service-level agreements and onboarding support similar to Accenture engagements.

Reception and controversy

Critical reception has highlighted Tresorit's strong emphasis on encryption and European data protection alignment, drawing favorable comparisons to Proton AG and Nextcloud. Reviewers in technology outlets that cover companies like Wired (magazine), The Verge, and TechCrunch have noted trade-offs between security and usability similar to debates around Signal and Tor. Controversies have centered on the practicality of client-side encryption for enterprise workflows, interoperability with legacy document management systems such as SharePoint, and discussions in legal forums about lawful access influenced by cases involving Microsoft Corporation and cross-border data requests. Security researchers from institutions like University College London and industry analysts at Gartner and Forrester Research have periodically assessed the platform in reports comparing encrypted collaboration tools, debating its suitability for highly regulated customers represented by organizations like European Commission agencies and multinational firms such as Siemens and BMW.

Category:Cloud storage providers Category:Companies of Hungary