Founding beta opens 15 October 2026

Financial help shouldn’t be a luxury.

Quasar is offline-first accounting and POS for freelancers and the self-employed. Your books live on your machine, encrypted. We can’t read them. Nobody can. One price, with lifetime ownership planned.

Quasar Dark Mode
Quasar Light Mode
Marius Nikolaï Lieutier

Built by one person. That’s the point.

Quasar is built and maintained by Marius Nikolaï Lieutier — an audio engineer from Mauritius who became a software engineer because he was tired of renting software he could never own and handing his financial data to companies he couldn’t verify.

If you have questions, you write to him. If something breaks, he fixes it. There is no support team to route you through, no analytics pipeline mining your behaviour, no “growth” division. One person means one accountability — and that’s why your data stays yours.

Native Point-of-Sale.
Zero sync delays.

The days of stringing together expensive POS systems and fragile cloud integrations are over. Quasar features a deeply integrated Point-of-Sale interface that writes directly to your local encrypted ledger.

  • ✓ Process offline sales flawlessly
  • ✓ Instant double-entry ledger updates
  • ✓ No 3rd-party subscription fees

The Quasar Arsenal. Focused, offline-first tooling.

Local Vault

SQLcipher

Scrambled

XChaCha20-Poly1305

Blind Cloud

E2EE Payload

Zero-Knowledge Encryption.

Your financial data is locked in an impregnable vault on your own device. When you choose to sync your data across your devices, it is scrambled into unreadable code before it ever leaves your computer. We have absolutely no way to read your data.

Local AI Engine.

The Local AI Engine is in development. When it ships, it will categorise transactions and answer complex financial questions on your device, ensuring your sensitive data is never sent to the cloud.

Emergency Kit

12-word recovery phrase

Flexible Recovery & Anti-Theft.

Zero-Knowledge doesn't mean zero recovery. Quasar shows you a 12-word recovery phrase to write down as your Emergency Kit, so you can regain access to your data if you forget your master password. A printable Emergency Kit PDF is planned.

Learn about Opt-In Escrow →

What you have now. What you could have.

Not a feature checklist. The gap you’re living in.

The dimension
What you probably have now
Quasar
Where your data lives
Someone else’s server
Your machine, encrypted
Who can read it
The company, and anyone they sell to
Nobody. Not even us.
What happens offline
Nothing works
Everything works
What you own
A subscription you can’t cancel
A licence with lifetime ownership planned
What you pay
Monthly, forever
One price, or 20 months to own (planned)
Accounting and sales
Two apps that don’t talk to each other
One app, one ledger

The Engine.

A mathematically fortified sovereign architecture.

SQLite & SQLcipher

The core ledger is an impregnable local database wrapped in SQLcipher. Your data lives on your machine, strictly secured against physical and network compromise.

XChaCha20-Poly1305 E2EE

Any snapshot synced to our infrastructure is strictly End-to-End Encrypted client-side. We possess absolute zero knowledge of your business data.

sqlite-vec & all-minilm-l6-v2

An ultra-lean local vector stack (sqlite-vec and fastembed) is in development for fast, low-RAM semantic processing completely offline.

Ed25519 Cryptographic Licensing

Software authorization is verified via mathematically signed, airgapped Ed25519 public-key cryptography.

Take back control.

Secure Your Licence