Every e-signature sends. This one thinks.
Sign AI Pro reads every page before you send it, catches the mistakes that kill deals, explains the document to your signer in plain language, and proves every signature with court-grade evidence. Nothing like it has existed until now.
Free plan: 7 documents a month. No credit card. Cancel anytime.
E-signature made signing fast. It made mistakes faster.
Every platform you have ever used is a courier: it delivers whatever you upload, errors included. Sign AI Pro is the first one that actually reads what you are about to send.
The bounced envelope
3 days lostAn error discovered after sending means void, redraft, resend and re-explain. The other side rereads everything with new suspicion. Momentum does not survive twice.
The missing field
1 in 8 envelopesAn initial line nobody placed, a date field skipped. Discovered at closing, it reopens an executed document at the worst possible moment.
The stalled signer
2 days of silenceTwenty-six pages of legalese land on a phone. The signer does not understand them, so they do nothing. You chase, they stall, the deal cools.
The unprovable trail
Audit exposureWhen a signature is challenged, screenshots and email chains are not evidence. You need timestamps, IPs and hashes that a third party can verify.
The first e-signature that reads before it sends
From upload to executed, without touching luck.
- 01
Upload anything
Drop a PDF or pick a template. The AI maps signature, initial and date fields for you in seconds.
- 02
AI pre-flight
Every page is read for errors, missing fields, conflicting terms and compliance risk. Flags arrive ranked, each with a suggested fix.
- 03
Signers tap, not squint
Recipients read a plain-language AI summary, then sign every field in one tap from any device. No accounts, 15 languages.
- 04
Proof files itself
Every event is hash-stamped into a court-grade certificate. The executed PDF lands in every inbox and archives itself.
Three inventions in one signature layer.
The unsend button, moved before send.
Sign reads the instrument like a sharp conveyancer: signature blocks against the parties, dates against the timeline, amounts against each other. Problems get fixed while they are still free to fix, and nobody on the other side ever knows there was one.
- Errors, gaps and conflicts ranked by severity
- Every flag carries a suggested fix
- A readiness score on every document
- Advisory by default, enforceable as a gate on Business plans
Signers who understand sign in minutes.
Every recipient can open a plain-language AI summary of the document before they sign, in their own language. Then one tap signs everywhere and one tap initials everywhere. No accounts, no printing, no confusion, no chasing.
- Plain-language AI summary on every envelope
- Sign all and Initial all in a single tap
- 15 languages, any device, no signer accounts
- Signing order, auto reminders and role-based fields built in
A trail a court would like.
Sent, viewed, signed, completed: every event lands in an append-only trail with timestamp, IP and cryptographic hash, sealed into a completion certificate. And the whole machine is programmable, so your stack and even your AI agents can send for signature.
- Hash-chained event trail on every envelope
- Completion certificate with the full evidence pack
- REST API, signed webhooks and MCP on every paid plan
- Auto-archive of completed envelopes with instant download
Executed in hours, defended for years
Sixteen rounds against DocuSign. Fifteen wins.
The same flawed contract, sent through both. Then filter the table by what you care about and tap any row for the receipt behind the claim.
Redraft. Resend. Re-explain.
Nobody on the other side ever knew.
DocuSign list pricing and reasonable use policy as published July 2026; verify current terms on their site. DocuSign is a trademark of DocuSign, Inc.
Drag the sliders. Watch the gap.
Your team size and monthly volume: Sign AI Pro's unlimited per-seat plans against DocuSign's metered ones.
5 Starter seats at $29/user/mo, unlimited documents, vs 5 DocuSign Standard seats at $45/user/mo.
Features they do not have, running live.
One tap signs everything
Sign all places every signature at once. DocuSign signers click every field, one by one, forty times on a long contract.
Signers understand first
“You are agreeing to a 12-month term. Your deposit is due Friday...”
Every envelope carries a plain-language AI Summary in the signer's own language. Understood documents get signed in hours, not days.
The API is not an upsell
REST API, signed webhooks and an MCP endpoint for AI agents ship on every paid plan. DocuSign sells developer access separately.
Free to start. Unlimited from $29.
Seven documents a month free, forever, with the full AI included. Paid plans remove every meter: unlimited documents and e-signatures from $29 per user, or $19 when billed annually.
Free
The full AI, on us.
- 7 documents a month (84 a year)
- AI pre-flight error scan
- AI plain-language signer summaries
- Cryptographic audit trail
- One-tap mobile signing in 15 languages
Starter
Unlimited signing, no meters.
- Unlimited documents and e-signatures
- Everything in Free
- Templates and bulk send
- Auto reminders and routing
- REST API, webhooks and MCP
Business
For teams and brands.
- Unlimited documents and e-signatures
- Custom branding
- CRM integrations
- Enforced pre-flight gate
- SSO and role controls
- Priority support
The Free plan needs no card. Paid plans switch on instantly and cancel anytime.
Optional add-ons
White-label branding, $3 a month. Your logo and name on every signing page, email and certificate, with all Sign AI Pro branding removed. Custom email service, $5 a month. Signing requests sent from your own domain, set up and monitored for you. Both switch on and off from your dashboard.
Nothing bounces anymore.
The pre-flight caught a signature block for a second seller who did not exist. That envelope would have voided at the notary. Nobody ever knew, which is the point.
Our sellers used to call twice per contract asking what clause 7 meant. Now they read the AI summary and sign the same hour. Two days became two hours.
A signature got disputed last year. We exported the trail: view time, IP, hash chain. The conversation ended there.
Asked and answered.
How is this different from DocuSign or SignWell?+
Those platforms are couriers: they move whatever you upload, errors and all. Sign AI Pro is a reader. An AI pre-flight catches mistakes before send, signers get a plain-language summary before they sign, and one tap signs every field. And the pricing is honest: 7 documents a month free forever, then unlimited documents from $29 per user, while DocuSign Personal caps you at 5 sends a month.
Are the signatures legally binding?+
Yes. Sign AI Pro implements the requirements of Canadian electronic commerce legislation and PIPEDA, and follows the ESIGN and UETA standards for US documents: intent, consent, attribution and record integrity, all captured in the certificate.
What exactly does the pre-flight check?+
Signature and initial fields against the parties block, date logic, amount consistency across pages, blank mandatory fields, and common compliance gaps in real estate paperwork. Flags arrive ranked by severity with suggested fixes.
Does the pre-flight block sending?+
By default it advises and you decide. Business plans can enforce a gate: no envelope leaves with an unresolved critical flag. Your call, your policy.
Do recipients need an account?+
No. Recipients sign from a secure link on any device: read the AI summary, adopt a signature, tap once to sign everywhere, done. Identity is captured through email attribution, the adopted signature and the evidence trail.
Can I plug it into my own stack?+
Yes. Every paid plan includes a REST API with per-tenant keys, templates you can send from with one call, signed webhooks for sent, viewed, signed, completed and voided events, and an MCP endpoint so AI agents can drive the whole loop.
Where do completed documents go?+
Wherever you want them: the executed PDF arrives in every inbox, auto-archives in your workspace, or downloads on demand. The certificate and hash chain travel with the document.
Is my document content used to train models?+
No. Documents are processed solely to run your pre-flight, summaries and signing workflow, in an isolated tenant, encrypted in transit and at rest.
Send the next one with a brain behind it.
Seven documents a month free, forever. Unlimited signing from $29 per user when you outgrow it. Upload a document and watch the AI read it in seconds.