We help teams collaborate securely and easily by protecting their data with end-to-end encryption.

How we’re building Tresorit

  • We encrypt everything to know nothing.

    We create secure, zero-knowledge apps that empower people to take control of their data. Our end-to-end encryption protects information in the cloud from everyone, even from us.

  • We value privacy as a human right.

    We’re committed to protecting our users’ privacy. We believe that the right to privacy is fundamental in the digital world, both for individuals and businesses.

  • We put people at the center.

    We believe that secure tools should seamlessly fit into workflows. Our goal is to keep Tresorit as simple as possible, so that people can stay secure without having to learn new ways of doing things.

Our story

Our story started when Istvan Lam, at the age of 12, received his first cryptography book as a gift from his family. It sparked his interest in cybersecurity and led him to start his fight for digital privacy in his late teens and research cryptography further. Ten years later in 2011, he founded Tresorit with two other university students and the head of a leading IT security institution. Since then, Tresorit has grown into a company bringing secure collaboration to teams all over the world.

  • 120+

    120+

    top talent engineers & marketers in our offices

  • 10,000+

    10,000+

    organizations use Tresorit

  • 193

    193

    countries where people sync files with us

  • 3

    3

    patents on encryption key management

  • 1,5+ million

    1,5+ million

    lines of code in our apps

  • 3

    3

    DefCons with our white hat hackers

Award-winning security

Zero-knowledge means we can never read our users' files. End-to-end encryption guarantees that any information, personal data, intellectual property, or confidential business files stay private and secure.

Learn more about our end-to-end encryption

Milestones in the history of Tresorit

  • 2021
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    October

    Tresorit is named as the 2020 Gartner Peer Insights Customers’ Choice for Content Collaboration Tools

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    July

    Tresorit launches its first podcast, Under CTRL, to raise awareness on cybersecurity

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    April

    Tresorit joins the fight against COVID-19 with free access to remote work solutions for public education and healthcare institutions

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  • 2020
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    March

    Tresorit improves its governance feature set with e-mail verification and detailed user reports

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    February

    The number of Tresorit’s employees reaches 100

  • 2019
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    September

    Tresorit raises €11.5M Series B funding

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    May

    The EU's general data protection regulation (GDPR) enters into force

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    January

    Tresorit receives ISO 27001 certification, further demonstrating our commitment to information security

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  • 2018
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    December

    Tresorit publishes its first transparency report

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    April

    LogMeIn co-founder Marton Anka joins Tresorit as an investor and advisor

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    March

    Istvan Lam discusses encryption & privacy rights at RightsCon

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    February

    Tresorit patents its shareable encryption technology in the US

  • 2017
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    December

    WIRED names 2016 as the year when end-to-end encryption has won

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    October

    Tresorit announces its NGO initiative to support activists

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    May

    The EU Parliament accepts the GDPR, a game-changing regulation in data protection

  • 2016
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    August

    Cloud storage pioneer Wuala shuts down, they recommend Tresorit as an alternative to their users

  • 2015
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    December

    The hacker challenge is closed. Over 100 teams attempted to break our encryption, but none succeeded

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    May

    Tresorit closes a second round of investment of $3M

  • 2014
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    June

    Tresorit’s userbase grows 200-fold, and the company triples its headcount from 8 to 25 people

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    April

    Tresorit launches its first public version and $50,000+ hacker challenge

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  • 2013
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    May

    Tresorit wins the European Prize at the Global Security Challenge

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    January

    We raises $1.7M Series A funding

  • 2012
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    2011 April

    Tresorit is established by Istvan Lam, Szilveszter Szebeni and Gyorgy Szilagyi

  • 2011 AprilTresorit is established by Istvan Lam, Szilveszter Szebeni and Gyorgy Szilagyi

Our founders

Istvan Lam, Szilveszter Szebeni and Gyorgy Szilagyi started Tresorit while still at university. They didn't trust mainstream file sync apps and decided to create a service with end-to-end encryption at its heart.

Meet our team

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  • Careers

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  • Contact us

    Do you have questions? Get in touch with us.

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