Zero-knowledge by design
Enclave never sees plaintext documents. All content is encrypted client-side before it ever leaves the user's device.
Everything. Encrypted.
Document signing without handing your files to a SaaS company.
Enclave Sign is a post-quantum, end-to-end encrypted signing platform. Documents are encrypted on your device before they leave it — Enclave never sees plaintext.
Core principles
Post-quantum signatures
Signatures use ML-DSA (Dilithium) — making signed documents resistant to quantum computing attacks.
Cryptographic audit trail
Every signing event produces a verifiable chain of signatures and timestamps — not just a server log.
How it works
01
Create an envelope
A sender uploads a document, places signature fields, and sends an envelope to one or more signers.
02
Sign on the client
The document stays encrypted end-to-end. Signers authenticate via link and sign — all cryptographic operations happen on-device.
03
Seal the envelope
Once all parties have signed, the completed envelope is locked with a final cryptographic seal and stored encrypted.
04
Verify independently
The audit trail can be independently verified using Enclave Verify — no trust in Enclave required.
Identity & verification
One account across Sign and Verify
Enclave Sign is integrated with Enclave Verify for cryptographic credentials and identity verification. Sign and Verify share a single SSO account — they are experientially one platform.
Shared SSO with Enclave Verify
Sign in once. Your credentials, verification history, and signing identity travel with you across both products.
Verifiable credentials at signing time
Signers can optionally present government ID, business identity, or other credentials — cryptographically bound to the signature.
Independent audit verification
Every envelope's audit trail is verifiable through Enclave Verify. Prove what was signed, when, and by whom.
Pricing
Save 25% with annual billing
Free
$0
- 5 envelopes per month
- Post-quantum E2EE signing
- Cryptographic audit trail
- Enclave Verify SSO
Starter
$15
per seat / month
- Unlimited envelopes
- 5 verifications per seat / month
- Reusable templates
- Bulk send
Most popular
Business
$30
per seat / month
- 20 verifications per seat / month
- REST API + webhooks
- Team management
- Custom branding
- Selective claim disclosure
- Priority support
Enterprise
Custom
Custom pricing
- Custom verification volume
- SSO / SAML
- Dedicated support + SLA
- Compliance exports
- Custom data residency
- White-label option
Overages
Verification$1.00per verification
Credential presentation$0.025per presentation
Same rates as Enclave Verify directly — no markup. Annual billing saves 25% over monthly on seat plans.
Who it's for
Privacy-conscious individuals
Verified, tamper-proof signing without giving a SaaS company access to your documents.
Legal & compliance teams
Cryptographically rigorous signing for regulated industries — finance, healthcare, and legal.
Developers & enterprises
A signing API that doesn't compromise on cryptographic integrity. Webhooks, REST, and team controls.
Organizations at scale
SSO, custom branding, data residency, and white-label options for enterprise deployments.
- Healthcare
- Legal
- Finance
- Compliance
Sign documents the way cryptography intended.
Post-quantum signatures. End-to-end encryption. A verifiable audit trail. Start free — no credit card required.