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 it as simple as possible, so that people don’t need to learn new ways of doing things to stay secure.

Our story

Our story started when Istvan Lam, only 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 after in 2011, he founded Tresorit with two other 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.

  • 70+

    people in our team

  • 10,000+

    organizations using Tresorit

  • 193

    countries where people sync files with us

  • 2

    patents on encryption key management

  • 1,5+ million

    lines of code in our apps

  • 3

    DefCons with our white hat hackers

Our 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

Our milestones

  • 2018
  • 2017
  • 2016
  • 2015
  • 2014
  • 2013
  • 2012
  • August

    We launched more business features to enable business admins better control company data and prepare for the GDPR
    Read more

  • April

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

  • March

    Istvan Lam discussed encryption & privacy rights at RightsCon

  • February

    We received the US patent for our shareable encryption technology.

  • January

    With a joint project with Apple CareKit, we launched ZeroKit, our SDK to bring end-to-end encryption to more apps
    Read more

  • December

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

  • October

    We announced our NGO initiative to support activists
    Read more

  • August

    Our largest redesign, Tresorit 3.0 rolled out to all users
    Read more

  • May

    The EU Parliament accepted the GDPR. It is a game-changing regulation in data protection.

  • March

    We launched Tresorit Drive, to help teams stay productive without storing data locally

  • October

    The Safe Harbor agreement was invalidated, clearly stating that data transferred from the EU to the US should have the same high level of protection
    Read more

  • August

    After cloud storage pioneer Wuala shut down, they recommended Tresorit to their users

  • July

    Major infrastructure, backend and feature updates were deployed to better serve our growing user base

  • February

    We launched Tresorit Web access, a secure, zero-knowledge way to use Tresorit from any browser
    Read more

  • December

    We closed the hacker challenge. 100+ teams tried, but no one could break our encryption
    Read more

  • November

    We launched Tresorit Business, our service for SMB and enterprise teams

  • May

    We closed a second round of investment of $3M

  • July

    The Snowden revelations proved that end-to-end encryption is needed to ensure security & privacy of data stored in the cloud

  • June

    We grew our user base by 200+ times, and tripled our headcount from 8 to 25 people

  • April

    Tresorit's first public version and our $50,000+ hacker challenge were launched
    Read more

  • May

    We won the European Prize at the Global Security Challenge

  • January

    We raised $1.7M Series A funding

  • 2011 April

    Tresorit was founded.

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

Our founders
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