[1][2] Founded in 2011, Tresorit closed an €11.5M Series B financing round in 2018 and was featured on FT1000 by the Financial Times 2020[3] as the fifth fastest-growing cybersecurity company in Europe.

In 2021, Swiss Post Communications Services acquired a majority stake in the company to expand its digital product portfolio.

Tresorit was founded in 2011 by Istvan Lam, Szilveszter Szebeni and Gyorgy Szilagyi with the aim of providing a secure alternative to traditional cloud storage solutions.

The company officially launched its client-side encrypted cloud storage service after emerging from its stealth beta version in April 2014.

[10] In 2016, Tresorit launched its NGO initiative with the aim of improving the digital security of non-profits and has gained notable recognition within the sector where the protection of sensitive information is paramount.

In 2020, during the COVID-19 pandemic, Tresorit offered free access to remote work solutions for public education and healthcare institutions.

[12] In July 2021, Tresorit was acquired by the Swiss Post[13] to further expand its presence in its core German-speaking markets, including Germany, Austria, and Switzerland.

The previous CEO and founder, István Lám, remained member of the Board of Tresorit Group but transitioned to the role of Director of Corporate Development.

[21] In 2020, Tresorit was named a 2020 Gartner Peer Insights Customers' Choice for Content Collaboration Tools[22] and was featured on FT1000 by Financial Times 2020 as the fifth fastest-growing cybersecurity company in Europe.

[25] ITPro called Tresorit it a “seriously secure cloud collaboration and file-sharing service” that is "perfect for handling confidential data”.