CrystalSign provides legally binding digital signatures with blockchain anchoring, multi-channel delivery, identity verification, and court-ready evidence packs.
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Modules
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API Endpoints
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E2E Tests
99.9%
Uptime
Secure, legally binding document signing with multi-channel delivery via email, WhatsApp, Telegram, and SMS.
Every signed document is anchored on the blockchain with Merkle proofs for tamper-evident verification.
Built-in OTP and ID verification (KYC) with configurable assurance levels per document type.
Anyone can verify document authenticity through the public verification portal with QR codes.