The decentralized alternative to DocuSign. Permanent, tamper-proof, and verifiable by anyone — forever. No middlemen. No monthly fees. No vendor lock-in.
Traditional e-signatures (DocuSign, Adobe Sign) store your signed documents on private corporate servers. You trust those companies to keep records forever, stay solvent, and never be hacked.
Blockchain document signing is different. When you sign with BlockSigner, your signature is recorded on the Algorand public blockchain — a decentralized ledger that no single company controls. The record is permanent, public, and cryptographically verifiable by anyone, anywhere, forever.
Your document is hashed using SHA-256. The hash is stored on-chain with your wallet's cryptographic signature — mathematically impossible to fake or alter.
Once recorded on Algorand, the signature exists forever. No company going bankrupt, no server deletion, no subscription required to access your records.
Anyone with the transaction ID can independently verify the signature on Algorand's public explorer — no BlockSigner account needed.
Only the document's hash goes on-chain, not the content itself. Sensitive contracts stay private while still being cryptographically signed.
Why decentralized document signing beats traditional e-signature platforms:
| Feature | BlockSigner (Algorand) | DocuSign / Adobe Sign |
|---|---|---|
| Signature storage | Public blockchain (decentralized) | Private corporate servers |
| Independently verifiable | ✓ Yes — anyone, anytime | ✗ Requires vendor access |
| Monthly fees | ✓ None | ✗ $15–$65+/month |
| Vendor lock-in | ✓ None | ✗ Records tied to platform |
| Record permanence | ✓ Permanent (blockchain) | ✗ Depends on subscription |
| Tamper-proof | ✓ Cryptographically guaranteed | Relies on vendor trust |
| Transaction cost | ✓ <$0.01 per signature | ✗ Included in subscription |
| Identity method | Algorand wallet (cryptographic) | Email + password |
| Open source | ✓ Yes | ✗ Proprietary |
Sign your first document on the Algorand blockchain in under 2 minutes:
Go to blocksigner.org and upload any document (PDF, TXT, DOCX). Your document is hashed locally in your browser using SHA-256. Only the fingerprint is sent — never the raw content.
Connect your Algorand wallet (Pera Wallet recommended). Review the document details and approve the signing transaction. Your cryptographic signature is sent to the Algorand network and confirmed in under 4 seconds.
Receive a blockchain transaction ID. Share it with counterparties, courts, or auditors. Anyone can verify your signature and document hash on Algorand's public explorer — no account or trust in BlockSigner required.
Not all blockchains are equal. Algorand was purpose-built for real-world applications requiring speed, low cost, and finality. Unlike Ethereum, Algorand transactions have instant finality — they cannot be reversed or reorganized. Your signed record is immutable the moment it's confirmed.
Algorand's pure proof-of-stake consensus is energy-efficient, battle-tested, and runs on a network of globally distributed nodes. It's the same infrastructure used by financial institutions and governments worldwide — now available for your documents.
Every aspect of BlockSigner's signing process is designed with cryptographic security:
Join thousands of users signing contracts, NDAs, and agreements on the Algorand blockchain. No account needed — just connect your Pera Wallet and start.
Sign a Document on Algorand →