Enterprise & Government Individuals & Small Business

Digital signing
secure, compliant, and quantum-ready future

Quantium solutions

Discover our products

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Simple Electronic Signature

Learn how to sign and manage documents
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Advanced Electronic Signature

Uniquely linked to the signatory
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Digital Signature

Legal presumption of authorship and integrity
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Graphometric Signature

Biometric capture of the holographic stroke
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Biometric Signature

Biometric capture of the holographic stroke

Legally binding signatures, anywhere in the world

Guaranteed legal validity

Compliant with eIDAS (EU), ESIGN Act (US), and regulatory frameworks in 180+ countries. Every signature generates court-admissible digital evidence with a full audit trail.

Bank-grade security

AES-256 encryption at rest, TLS 1.3 in transit, and RFC 3161 qualified timestamps. Documents are sealed against any post-signature alteration.

No installs, no friction

Works on any device and browser. Just send a link. Your signer clicks, signs and you’re done.
We make signing documents simple and secure​

Simple Electronic Signature (SES)

Quantidia Sign enables organizations to close deals faster by delivering legally binding electronic signatures that protect every party, ensure compliance, and eliminate paperwork — from the first click to the final seal.
From internal approvals to multi-party contracts, Quantidia Sign adapts to your process — not the other way around. Send, sign and archive in seconds, with a complete audit trail that holds up in court.

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Advanced Electronic Signature

Signatures uniquely linked to the signatory

Advanced Electronic Signature (AES) goes beyond a simple click — it cryptographically ties the signature to the signer’s verified identity. Legally recognized under eIDAS Article 26, it’s the standard for contracts, financial documents and regulated workflows.

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Not sure which signature type fits your use case?
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ABOUT THIS PRODUCT

Digital Signature

A Digital Signature uses PKI certificate technology (X.509) to cryptographically bind the signer’s identity to the document. Any alteration after signing is immediately detectable — making it the highest legally recognized standard under eIDAS, ESIGN Act and Law 25.506. Required for notarial acts, regulated industries and high-value contracts where proof of authorship must be unquestionable.
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Protect & defend
Secure progress
Innovative
Resilient flow

Sign with confidence and ensure every agreement holds legal weight from day one

IN-PERSON SIGNING REIMAGINED

Graphometric Signature

Beyond a simple image of your signature, Graphometric captures the unique behavioral patterns of how you sign — data that is statistically impossible to forge and admissible as biometric evidence in court.

Graphometric Signature brings the familiarity of pen-and-paper signing into the digital world — without losing any of its legal weight. Every stroke is recorded, encrypted and bound to the document in real time.
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Biometric Signature

Biometric Signature combines handwritten stroke capture with advanced identity verification — facial recognition, fingerprint or document scan — to create the highest level of signing assurance available. Every biometric data point is encrypted and permanently bound to the document, producing legally irrefutable proof of identity. Built for contracts where the stakes are too high to leave any room for doubt.

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Special methods

Sign via Whatsapp​

Chatbot-guided workflow. No additional app required; the entire management workflow is guided by a chatbot.​
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Sign with ID card​

National ID card chip certificate, read via NFC from a mobile phone. No external token required.
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