|Operating system||Microsoft Windows,
Mac OS X,
|Available in||English, French, German, Hungarian, Spanish|
Tresorit is an online cloud storage service based in Switzerland and Hungary that emphasizes enhanced security and data encryption for Businesses. The service starts at 12.50 EUR/Month/User/1000GB and there is a 14-day trial. The Business version offers up to 1Tb of storage space per user and extra security features such as DRM, granular access levels and other functions which aim to create a safer collaborative environment. Tresorit has been likened to a high-security alternative to Dropbox.
Tresorit's service is accessible through client desktop software, web-based application and mobile apps. Currently, the software is available for Windows, Mac, Android, Windows Phone 8, iOS, BlackBerry OS and Linux.
In August 2015, Wuala (owned by LaCie and Seagate), a pioneer of secure cloud storage, announced it was closing its service after 7 years, and recommended their users to choose Tresorit as their secure cloud alternative.
"Tresors" (German for vaults) are encrypted counterparts of uploaded directories. Tresors automatically sync with the cloud as files are added or removed from them, similar to Box.com and Dropbox's desktop software. The main difference between Tresorit and its competition is that Tresorit applies AES-256 client-side encryption to files while they’re still local and then uploads them to the cloud. Also, thanks to end-to-end encryption, users can share protected files and folders with others and work together on them, keeping the documents synced and secure in every step of the process. There are additional layers of security, but the key info is that the encryption key never leaves the user. Using Zero-Knowledge encryption protocols, Tresorit is not in possession of the users’ authentication data, so they can’t be leaked from their servers nor delivered to Governments upon request.
In 2013 and 2014, Tresorit hosted a hacking contest offering $10,000 to anyone who hacked their data encryption methods to gain access to their servers. After some months, the reward was increased to $25,000 and later to $50,000, challenging top hackers from institutions like Harvard, Stanford or MIT. The contest ran for 468 days and no hackers were able to break Tresorit’s encryption.
Prices range from 12.50 EUR/month/user for 1000 GB (Small Business) to 25 EUR/month for 1000 GB (Individual). There is a basic 'Reader' plan which is free 
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- Get 50GB of Free, Encrypted Online Storage from Tresorit
- Tresorit takes on PRISM-provoked worries with encrypted cloud storage
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- Hungarian ‘security freaks’: Hack our startup and we’ll give you $25K
- Hackers, Here's a Way To Make An Easy $25k
- Secure cloud firm Tresorit boosts hacker bounty to $25,000
- UP Cloud Computing Conference-Start Cloud Awards rankings as of October 17, 2012
- awards | UP 2012 - Cloud Computing Conference 2012