Private messaging.
No phone number. No tracking.

We build digital services that put your privacy first. Based in Finland since 1997.

About Zumitomi Oy

Established in 1997, originally in automotive technology imports and management services. We have been building web services since 1999. Currently our sole focus is private, secure messaging.

privis.app

Our production messaging service. No phone number, no email, no real name. End-to-end encryption options. Works in any browser — nothing to install.

Open privis.app →

seku.chat

Our development and testing site where new features are tested before they are deployed to privis.app. Same technology, earlier access.

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Privacy articles

Why privacy matters, how encryption works, and debunking common myths.

Security & Threat Model
How privis.app protects your messages — and, honestly, what it cannot. Our encryption, architecture, and an open threat model, in plain language and technical detail.
Zumitomi Oy – Finnish Privacy Technology Company
Learn about Zumitomi Oy, the Finnish company behind privis.app - Building fair technology since 1997.
Privacy Education
Busting common privacy myths with clear explanations. Understand why privacy matters in everyday life.
Private & Secure Messaging
Finnish company behind privis.app — private messaging with strong encryption and no phone number, no email.
Deleting Messages or Account Makes Everything Disappear - Myth
Why deleting your messages or account doesn't always mean your data is gone. Understand how real privacy works.
Encryption is Only for Criminals - Myth
Why encryption is not just for criminals. Strong encryption protects normal people every day.
If It's Free, You're the Product - Myth
Why the saying 'If it's free, you're the product' is mostly true — and how privis.app is different.
I Have Nothing to Hide - Myth
Why 'I have nothing to hide' is one of the most dangerous privacy myths. Real explanation with practical examples.
Only Paranoid or Criminals Need Privacy - Myth
Why the idea that 'only paranoid or criminals need privacy' is wrong. Privacy is a normal human right for everyone.
privis.app – Private Messaging - no Compromises
Discover privis.app: No phone number, no email, strong encryption, works in browser. Private messaging done right.
Who Uses privis.app – Real-World Use Cases
Discover how different people use privis.app for private, secure communication in everyday and sensitive situations.
How Encryption Works in privis.app
Clear explanation of how encryption works in privis.app. Easy, Medium and Hard modes explained in plain language.
Why Privacy Matters — Even If You Have Nothing to Hide
The most common argument against privacy is 'I have nothing to hide.' Here is why that argument fundamentally misunderstands what privacy is for.
Frequently Asked Questions | Zumitomi Oy & privis.app
Clear answers to common questions about privis.app privacy, security, features, and account management.
Our Values & Transparency
Zumitomi Oy’s core values: Privacy, Transparency, Sustainability, and Respect for the user.
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