Certify your texts, ideas and files with a Bitcoin blockchain timestamp
On-chain DEX aggregator
Stage
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Founded
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Based in
ES
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Pricing model
Freemium
Free
Pricing
Free plan: €0, includes unlimited Bitcoin certification, shareable proof links, REST API, and 3 web page captures per day. Pro plan: €4.90/month, adds RFC 3161 timestamping, eIDAS qualified certificates, official PDF certificates, 20 web page captures per day, and identity verification.
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Key features
Bitcoin anchoring via OpenTimestamps protocol
SHA-256 fingerprint computed locally in browser
REST API for integration and automation
RFC 3161 qualified timestamps for European legal recognition
eIDAS-qualified PDF certificates from Sectigo
Web page capture and archiving
Optional identity verification via Stripe Identity
Webhook notifications for proof confirmation
Independent verification via opentimestamps.org
AES-256-GCM encryption for Pro stored content
Split trades across multiple pools and paths for optimized execution
Test-run every transaction step before signing
Swap tokens on a single chain or across six different blockchains
Get native gas coins by authorizing stablecoin transfers
Track swap status including pending, in-progress, delivered or refunded states
What makes it different
No trusted third party required—proofs remain verifiable forever without Proxae
Original content never leaves your device—only cryptographic fingerprint is transmitted
Mathematically immutable—proof dates cannot be modified without invalidating Bitcoin blockchain
User's own wallet signs all transactions; Cleave never signs or sends
No API key required for agent access
Agents receive same quotes as the app with transparent planning
Fallback mechanism delivers bridged token if cross-chain swap fails on arrival
Unused input automatically refunded in the same transaction
Proxae
Cleave