End-to-end encrypted cloud storage founded in 2011, owned by Swiss Post, the national postal service of Switzerland. Closed-source clients with multiple independent security audits; available on Windows, Mac, Linux, Android, and iOS.
Official website tresorit.com
Our take
Tresorit earns its spot on the merit that actually matters: the encryption is real, the audits are credible (Ernst and Young, Computest, ISO/IEC 27001 via TUV Rheinland), and Swiss Post ownership means it operates under Swiss law rather than EU or US jurisdiction. The catch is the price - it is one of the more expensive options in this category and the clients are closed-source, so you are trusting the audit findings rather than inspecting the code yourself. The right pick for users who want a polished, business-grade encrypted cloud with a verifiable audit trail and no DIY setup.
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