Enclave Sign
Post-quantum, zero-knowledge e-signature with no envelope limits. A DocuSign alternative built for regulated buyers - open to any developer via API.
Free tier available. Paid plans from $20/seat/mo. REST API on Business.
- Client-side encryption before upload - Enclave never sees plaintext
- ML-DSA-87 signatures with cryptographic audit trail
- Unlimited envelopes on paid plans; REST API and webhooks
- Integrate today - no sales gate, no security downgrade