Sigillarium

Your documents,protectedlocally

For individuals, freelancers and independent professionals. Local document storage, customizable watermarks, and biometric protection. A local alternative to cloud solutions.

Sigillarium home screen: secure vault, quick actions and recent documents

Everything you need

To secure and manage your documents with complete confidentiality

100% Local Storage

Your documents stay on your device. No cloud upload, total control of your data.

Customizable Watermarks

Apply VISIBLE watermarks (text, color, position, opacity) to your images and PDFs.

Integrated Scanner

Digitize your paper documents directly with your camera and protect them locally.

Private Vault

Store your documents in a secure vault directly on your phone.

Integrated Search

Find your documents by name, date, or file type with built-in search and sorting.

No Account

No email, no password, no sign-up. The vault opens with your biometrics (fingerprint/Face ID).

AES-256 Encryption

Your files are encrypted at rest with AES-256-GCM using a key unique to your device, and the vault database is encrypted with SQLCipher.

Your Privacy Protected

100% Local Documents

Your documents NEVER leave your device. Private local storage only.

No Account to Create

The app opens straight away. The encryption key stays in your phone's hardware keystore and never leaves it.

No Personal Data

We collect no name, no email, no password. NO document data uploaded.

GDPR Compliant

Full respect for your privacy and European data protection regulation.

What a watermark does — and what it does not

A visible watermark does not prevent a document from being reused. It can be cropped, retouched, and today's AI tools remove it quickly and well. We would rather tell you here than let you find out at the worst possible moment.

What it does do:

  • It states an intent. "Copy given to this organisation, on this date, for this purpose": the document now has a declared use, and any other use is visibly a diversion.
  • It discourages opportunism. Most misuse does not come from determined forgers, but from people who found a convenient file.
  • It leaves a trace. Removing a watermark is a deliberate act, hard to pass off as an accident in a dispute.

Burglaries happen, and we still lock our doors. A lock does not make theft impossible: it makes it harder, slower, and unambiguous.

The strong guarantee is elsewhere. The AES-256 encryption of your vault is not a deterrent, it is an impossibility: without your device, your documents are unreadable — including to us.

Free vs Premium

Choose the plan that suits you

Free

€0 /month
10 documents maximum
50 MB storage
Visible watermarks
Integrated scanner
Secure vault
Biometric authentication
Priority support
Download
RECOMMENDED

Premium

€9.99 /month
or €79.99/year (save 33%)
Unlimited documents
Unlimited storage
Advanced customizable watermarks
Integrated scanner
Secure vault
Biometric authentication
Priority support
Early access to new features
Try Premium
✓ Cancel anytime

Coming Features

Guided Onboarding
Authenticity QR Code
Folder Tree

Download Sigillarium

Available soon on your favorite platforms

Version 1.0.0 | Last updated: May 2026