A small team in Tallinn building cloud storage that respects you.
5sync was born in Tallinn in 2023. We saw firsthand how Big Tech was scanning files for ads, training AI on documents, and selling attention to the highest bidder. We decided to build the alternative — a file sync platform where privacy is the default, not a premium feature.
5sync is simple, private storage with zero-knowledge encryption — we mathematically cannot access your files, even if compelled to. Our client applications are fully open source, our security model is published and independently audited, and our business model is refreshingly boring: you pay for storage, and that's it. No ads, no tracking, no data mining. We're a small team from Tallinn doing one thing well, and we plan to keep it that way.
Founder & CEO
Former Skype engineer with 12 years building secure communication systems. Privacy advocate who helped shape Estonia's e-Residency digital infrastructure.
CTO
Led infrastructure at Bolt for 3 years, scaling real-time systems across 45 countries. Brings 10 years of distributed systems expertise to 5sync.
Head of Security
Former Cybernetica researcher specializing in cryptographic protocols. Contributed to Estonia's X-Road secure data exchange platform.
We charge for storage, not for your attention or data. No ads, no tracking, no profiling. Our incentives are aligned with yours.
Our client applications are fully open source. Our security model is published. Our infrastructure is audited. Trust is verified, not promised.
We're a small team and proud of it. No bloat, no feature creep, no enterprise sales theater. We do one thing and do it well.
Founded 2023 · Tallinn, Estonia · 5,000+ users