The signature
of record.
SignFlowX sends offer letters, NDAs and contracts that people sign on their phone — sealed, tamper-evident, and legally binding, with a full certificate of record for every signature.
Built for compliance
A signer's bill of rights
Every person you send to is protected by these — by default.
Know before you sign
An AI summary explains the document in plain English — key terms and clauses to note — before anyone signs.
Only you can sign
Optional identity check: signers confirm their name (3 tries, then the link locks) before the document is even shown.
A permanent record
Every signature is sealed with a SHA-256 hash, Document ID, timestamp and IP — and a court-ready certificate.
Sign anywhere
Email, SMS or WhatsApp; sign on any phone with no app, account or password.
A complete signing platform
AI document intelligence
Plain-English summaries, key terms and risk flags on every document.
Add fields & text
Signature, date, initials and your own text anywhere on any PDF.
Bulk send
One document to hundreds — each individually tracked and sealed.
Sealed & verifiable
Tamper-evident PDFs with per-page Document ID and SHA-256.
Teams & roles
Organizations, sub-orgs, granular roles, IP allowlists and access passes.
Certificate of record
A clean, court-ready audit certificate accompanies every document.
Enterprise-grade security & controls
Protect your workspace with network rules, identity checks and a full hierarchy — the controls larger teams need, on every paid plan.
Network protection
Lock access to your office IPs, VPN or CIDR ranges with allowlists. Optional download-only mode lets people work off-network but blocks PDF exports.
Signer identity checks
Require signers to confirm their identity before the document is even shown — links lock after three failed attempts.
Orgs, sub-orgs & roles
Multi-level organizations with an Owner → Admin → Manager → Member hierarchy and granular per-member permissions.
Task assignment & audit
Assign envelopes to teammates, transfer and track them, and export a complete audit trail of every action.
Device & session controls
Two-device login cap, trusted-device verification codes and idle auto-logout keep accounts locked down.
Blockchain anchoring
Anchor each signed PDF’s hash to Bitcoin via OpenTimestamps — independently verifiable, forever.
SignFlowX vs. other providers
| Capability | Other providers | SignFlowX |
|---|---|---|
| Identity-verified signers | Add-on | ✓ Built in |
| AI summary for signers | — | ✓ |
| WhatsApp / SMS delivery | — | ✓ |
| Bring-your-own AI model | — | ✓ |
| Tamper-evident + certificate | ✓ | ✓ |
| Setup time | Hours | Minutes |
| Starting price | $25/user | $25/mo flat |
"We turned a three-day signing chase into a three-minute send — and every offer comes back sealed, verified, and on the record."
One flat price. Scale when you do.
The AI assistant is included in every plan — higher tiers add seats, envelopes, templates and advanced AI. Need to send more? Extra envelopes are billed at your tier’s per-envelope rate.
Basic
For individuals
- ✓ 1 user
- ✓ 10 envelopes / month — then $5 each
- ✓ 5 templates
- ✓ AI assistant included
- ✓ Magic-link signing + audit trail
Team
For small teams
- ✓ Up to 5 users
- ✓ 50 envelopes / month — then $3 each
- ✓ 20 templates
- ✓ Reminders, branding & AI
- ✓ Everything in Basic
Business
For growing orgs
- ✓ Up to 10 users
- ✓ 250 envelopes / month — then $2 each
- ✓ 100 templates
- ✓ Bulk send · SMS/WhatsApp · analytics
- ✓ Everything in Team
Enterprise
For large organizations
- ✓ Custom users & envelopes
- ✓ API & webhooks · white-label
- ✓ Bring-your-own AI model
- ✓ Blockchain anchoring
- ✓ Priority support