Private by design · No accounts, no tracking

Cyfron is one app for online communication — messaging, email, calendar, files, signed documents. No accounts to create. No company in the middle. No data sold. Just you, and the people you talk to.

Join the alpha→See how it works
0
passwords
0
accounts to create
100%
under your control
00 See it in action

Everything you do online, in one private app.

Messages, files, calendar, signed documents, your news and an on-device assistant — on your desktop and your phone, talking to each other directly. This is what Cyfron looks like.

03 what you get

Everything you need, all yours.

Messaging, mail, calendar, tasks, documents and more — in one app, all private, all under your control. No accounts to create, no platforms to trust.

One identity, everywhere

No passwords, no accounts. Your identity lives on your device — and works across everything you do.

  • ▸ No emails, no passwords, no signup
  • ▸ Same identity for messaging, mail, calendar and documents
  • ▸ Add a laptop, tablet or second phone — all linked to you
  • ▸ Lose a device? Recover safely from a backup you set up in advance
  • ▸ Keep separate identities for work, family or public life — your call

No passwords, no accounts. Your identity lives on your device — and works across everything you do.

  • ▸ No emails, no passwords, no signup
  • ▸ Same identity for messaging, mail, calendar and documents
  • ▸ Add a laptop, tablet or second phone — all linked to you
  • ▸ Lose a device? Recover safely from a backup you set up in advance
  • ▸ Keep separate identities for work, family or public life — your call
02 how it works

Three steps. Then it's yours, forever.

01

Install the app

Download Cyfron for your computer or phone. Open it once. That's it — no signup form, no email, no password to remember.

02

Add your people

Show a friend your QR code, scan theirs, or share a link. They're in your contacts — verified, no email or phone number needed. Your address book is yours.

03

Use it like any other app

Send messages, write emails, plan meetings, share files, sign documents. Everything stays private, on your devices. Add a laptop or tablet anytime — your stuff comes with you.

01 why this matters

Today, you don't own your digital life — you rent it.

Every app wants a new account. Every account belongs to the platform. Lose access — to your inbox, to your phone, to the company itself — and you lose everything attached to it.

today's web
  • 16 accounts. 16 passwords. 4 locked out ✱
  • your inbox is your identity — until Gmail bans you ✱
  • "sign in with Facebook" hands your data to strangers ✱
  • your contacts live on six servers you don't own
  • your messages train an AI you'll never use ✱
  • want to leave? export denied
with cyfron
  • One identity. No passwords, nothing to remember.
  • No email or phone number — nobody can ban you
  • You sign in as you. No company in the loop.
  • Your contacts, calendar and mail live on your devices
  • Nothing trains anything unless you decide so
  • Switching devices? Copy a backup file. Done.
04 why you can trust it

Open. Audited. Aligned with you.

We can't earn your trust by asking for it. So we built Cyfron in a way that lets you check.

01
Source Available

Every line of code is public. Read it, modify it, build it, audit it, run it yourself — free for any non-commercial use.

02
Trusted cryptography

Built on the audited libraries and validated by the security community.

03
We don't make money from you

Companies that integrate Cyfron pay us a license fee. That funds the team — so we never have to sell your data, run ads, or lock you in. Read more about the license.

06 faq

Straight answers before you start.

One app for messaging, email, calendar, files and signed documents — private by default, with no accounts and no platform in the middle.
Yes — free forever for personal use. Cyfron is source available: the full source code is yours to read, modify and run for any non-commercial use. Only commercial use requires a paid license. We make money by licensing it to companies that build it into their products, so we never need to make money from you, your data or your attention.
No. There is nothing to sign up for. When you open the app for the first time, your device creates a unique key — that's your identity. No email, no phone number, no password.
Only the people you send them to. Cyfron encrypts everything on your device before it leaves. Not even we can read your messages, files or calendar — there is no server in the middle that ever sees them.
Before you do, you set up a second device or a recovery key — a one-time setup that takes a minute. If you ever lose a device, you remove it from the others and carry on. No "forgot password" email needed, because there is no password.
Yes. Everything lives on your devices. Move to a new phone or computer with a backup file — your messages, mail, calendar, contacts and signed documents come with you. Nothing is locked behind a platform.
cyfron · source available · SDL licensed

Invite only

Cyfron is in closed alpha and currently open to invited testers only. Want to join? Write to us at contact@sigmion.global.

Request an invite→