Document signing with blockchain-verified proof. Choose zero-custody processing or encrypted cloud storage with AI-powered field placement and comprehension gating. Pay per document — or go Enterprise.
Every document gets blockchain-verified proof of signing. The difference is where processing happens.
Documents are processed entirely in your browser. Nothing ever touches our servers — only a cryptographic hash reaches the blockchain.
Documents are encrypted and stored on our servers, unlocking AI features: automatic field placement, Proof of Understanding gating, and document intelligence.
No downloads, no installs. Works in your browser.
Drag and drop any PDF. Choose zero-custody (browser-only) or encrypted cloud for AI features.
Place signature fields manually or let AI do it. Add Proof of Understanding or KYC requirements. Enter recipient emails.
Signers open the document in their browser. If PoU is enabled, they prove comprehension before signing. If KYC is required, they verify inline.
A cryptographic hash, signer wallet, comprehension score, and timestamp are anchored to the Pangea Protocol blockchain. Tamper-proof — forever.
Use them individually or together. Add Proof of Understanding or KYC verification to any signing or T&C workflow — per-use, no subscription required.
E-signatures with blockchain-verified proof. Choose zero-custody (browser-only) for maximum privacy, or encrypted cloud for AI-powered field placement. ESIGN & UETA compliant.
Verify the authenticity and integrity of any Blocksee-signed document. Anyone can check a signature's on-chain proof — no Blocksee account needed. Confirm the document hasn't been tampered with, who signed it, and when.
Embeddable acceptance tracking for your website. Record exactly which version of your terms each user agreed to, when, and — with PoU enabled — prove they understood them. Immutable on-chain record.
See how Blocksee compares to incumbents.
No tiers for basic use. Every document gets blockchain verification. Add AI features and KYC as you need them.
In zero-custody mode, your document is processed entirely in your browser — it never touches our servers. Only a cryptographic hash reaches the blockchain. In encrypted cloud mode, your document is encrypted and stored on our infrastructure, which enables AI-powered features like automatic field placement and Proof of Understanding comprehension gating. Both modes produce blockchain-verified signatures. You choose per document.
Proof of Understanding is our patent-pending comprehension verification system. You can add it to any Sign or Terms & Conditions workflow. AI analyzes your document's material terms, obligations, and risks, then generates questions specific to that document. Signers must answer correctly above a threshold you set before the signature field unlocks. The comprehension result is recorded on-chain as a zero-knowledge proof — creating evidence of informed consent without revealing the specific questions or answers.
KYC is a per-use add-on you can enable within any Sign or Terms & Conditions workflow — no subscription required. When you activate it for a document, the signer completes identity verification (document upload + liveness check) inline without leaving Blocksee. A zero-knowledge credential links their verified identity to their PayPangea wallet. Blocksee never stores identity documents. Once verified, the signer's KYC status is reusable across the entire Pangea ecosystem.
Yes. Blocksee signatures comply with the U.S. ESIGN Act and UETA, which give electronic signatures the same legal weight as handwritten ones. The blockchain-anchored audit trail actually provides stronger evidence of signing than traditional e-signature platforms. When Proof of Understanding is enabled, it creates additional evidence of informed consent — particularly valuable in disputes over whether a signer understood the terms.
DocuSign always stores your documents on their servers — there's no option for zero-custody processing. They don't offer blockchain-verified signatures, Proof of Understanding, inline KYC, or version-specific T&C acceptance tracking. And they require a monthly subscription starting at $10/month. Blocksee offers zero-custody as an option, blockchain-verified proof, open third-party verification, AI-powered comprehension gating, pay-per-document pricing, and per-use add-ons without subscription lock-in.
No. A PayPangea wallet is created for you automatically behind the scenes when you first use Blocksee — you don't need to set anything up or know anything about blockchain. It works invisibly to anchor your signatures on-chain. If you complete KYC, that verification is linked to this wallet and reusable across the Pangea ecosystem.
Enterprise is a SaaS subscription for teams with high-volume needs. It includes unlimited documents, all three modules activated (Sign, Verify, Terms & Conditions), both add-ons included (Proof of Understanding and KYC), API access for workflow integrations, and a dedicated account manager. Contact us for custom pricing based on your volume.
Upload a document and sign it in under 60 seconds. $1. No subscription. Add PoU or KYC when you need them.