Upload contracts for AI-powered clause analysis, send them for cryptographic multi-party signing, and anchor every signature on the Bitcoin blockchain with IPFS proof storage.
Upload PDF, DOCX, or text. StrikeClause identifies risky clauses, scores your position, and generates redline suggestions using CUAD-trained models.
Each user gets a secp256k1 keypair. Sign contracts with ECDSA — the same cryptography that secures Bitcoin. Invite multiple parties via email or share link.
Every signature is recorded on Bitcoin via OP_RETURN transactions. The blockchain timestamp proves the contract existed and was signed at that moment — immutable and independently verifiable.
Signing proofs are stored on IPFS — decentralized, content-addressed, and tamper-proof. The IPFS hash is embedded in the Bitcoin transaction, creating a complete chain of evidence.
Drag and drop a PDF, DOCX, or paste text directly. StrikeClause extracts every clause and provision automatically.
AI identifies 40+ risk categories — auto-renewal, liability caps, IP ownership, termination rights. Each clause gets a position score and severity rating.
Add counterparties by email. Each signer gets a secp256k1 keypair and signs with ECDSA. Track who's signed in real time.
Each signature gets its own Bitcoin OP_RETURN transaction. The full proof — signatures, hashes, timestamps — is stored on IPFS and linked on-chain forever.
Anyone can verify a signed contract using the Bitcoin transaction ID. No account needed.
This checks the Bitcoin blockchain for the transaction, retrieves the IPFS proof, and verifies all cryptographic signatures — completely independently of StrikeClause.
Start free. Scale when you need to.
For individuals
For teams
For organizations
StrikeClause uses the same ECDSA cryptography that secures Bitcoin. Signatures are mathematically verifiable and anchored on the Bitcoin blockchain with a timestamp. While legal enforceability varies by jurisdiction, cryptographic signatures are recognized under the US ESIGN Act and EU eIDAS regulation.
Bitcoin OP_RETURN transactions typically cost $0.10–$2.00 depending on network congestion. This fee is included in Pro and Enterprise plans. Free tier uses Bitcoin testnet for demonstration.
Your private key is encrypted with your passphrase and stored securely. You can export it for backup at any time. If lost, we can generate a new keypair — but previously signed contracts remain valid on the blockchain forever.
Yes. Export analyses as PDF, DOCX, or JSON. Your signing proofs are on IPFS and Bitcoin — they exist independently of StrikeClause. You can verify any signed contract using any Bitcoin block explorer.
StrikeClause uses CUAD-trained models to classify clauses across 40+ risk categories. Each clause is scored based on your negotiating position (buyer vs. seller, employer vs. employee, etc.) and flagged with severity ratings and suggested redline language.
Yes. Counterparties receive a magic link via email or share URL. They can review the contract and sign directly — a temporary keypair is generated for them. They can optionally create an account to manage their signed contracts.
Sign up and we'll load a sample contract so you can see the full analysis, risk scoring, and redline suggestions immediately.