A small team with a clear purpose

How it started

In early 2019, Mart Tamm and Kristjan Rebase were working at a Tallinn-based consultancy that handled financial documents for clients across the EU. The firm relied on a well-known collaboration platform for internal projects. One afternoon, a routine audit revealed that the platform provider's employees had theoretical access to every document in the workspace. The encryption happened server-side, and the provider held the keys.

That felt wrong. Not because the provider had done anything malicious, but because the architecture made abuse possible. Mart and Kristjan spent the next six months building a prototype for a team workspace where content was encrypted entirely on the client side, with keys derived from the user's credentials. The server would store encrypted data and nothing else.

Fileson launched to the public in November 2019 with a free tier and a single paid plan. The first hundred teams were mostly Estonian IT consultancies who understood the security model and gave direct, unfiltered feedback. That feedback shaped every major product decision since.

Today the team is 35 people across engineering, design, and customer operations. The office is in Ülemiste City, Tallinn's technology district. The company is profitable, privately held, and has not taken venture capital. We intend to keep it that way.