Private until you send. Provable after you sign.
Drop a PDF and everything happens on your device: CyberSygn finds every signature line right in your browser, and your document is not uploaded until you choose to send it. Send it for signature and, when the last signer finishes, CyberSygn issues one signed PDF to every party and records its SHA-256 fingerprint, which anyone can check, free, at cybersygn.io/verify.
No account, no card. Your PDF stays on your device until you send it.
Your first one's on us. No card, no trial clock.
In their words.
Used CyberSygn? Share your experience.
A fair comparison.
DocuSign built the category. These are the plain differences people weigh when they switch. Facts only, so you can decide for yourself.
Files stay in your browser
Detection runs on your device. Your document does not leave the page until you choose to send it, a claim a server-side signer cannot make.
Proof anyone can check
Send a document and every party ends up with the same signed PDF, the one CyberSygn issued, not a copy each browser made for itself. Its SHA-256 fingerprint is printed on the audit certificate, and anyone holding the file can check that fingerprint at cybersygn.io/verify. No account, no login, free.
Fields found for you
CyberSygn reads the PDF and highlights every signature line, initial, date, and checkbox, so you are not dragging boxes onto every page by hand.
Unlimited, on a flat plan
Send as many documents as you need. Incumbent plans commonly cap envelopes per user and charge once you pass the limit. No per-seat math to get to unlimited.
499
Real contracts validated.
~2min
A typical send.
0
Manual field placement.
115/120
Regression tests passed.
How it works.
Upload a PDF. CyberSygn finds the fields. Pick in-person signing on the spot, or send private links to remote signers. Send it, and the moment the last signer completes CyberSygn issues the signed PDF and a tamper-evident audit certificate to every party.
Any PDF works. Or photograph paper documents with your camera and we'll compose them into a PDF locally. Detection then runs in your browser and highlights every field.
Pass the iPad around if your signers are present. Or route a private link to each remote signer. No accounts, no passwords, no setup on their end.
On a document you sent, the moment the last signer completes CyberSygn flattens the signatures into one signed PDF and gives that same file to everyone, with an audit certificate listing every event, every IP, and the SHA-256 fingerprint of that file. Signing in person and downloading here instead gives you the flattened PDF straight from your browser; sending is what produces the certificate and the public fingerprint.
Free templates.
Download the starting point, edit the specifics, sign in CyberSygn. Every template in the library has been validated against the detector, drop it in and every field appears automatically.
The field-placement tax.
Enter how many documents you send per month and what your time is worth. We'll show the math on what manual field placement is costing you.
Browser-local
Detection runs in your browser. Bytes never leave the page until you choose to send.
SHA-256 audit cert
Every signing event, IP, and timestamp, plus a SHA-256 fingerprint for each file the signing produced, labeled with the file it covers. Anyone holding that file can check its fingerprint at cybersygn.io/verify.
ESIGN + UETA
Same federal-level legal weight as DocuSign, HelloSign, and Adobe Sign.
499 of 499
Found signature fields in 499 of 499 real contracts in our test corpus, plus 120 synthetic tests across 12 categories.
Built on Cloudflare
Served from Cloudflare's global edge network. Low latency everywhere.
Origin members.
- of 100 Origin spots claimed. When the cap fills, the rate disappears. Forever.
Before you decide.
Yes. From your dashboard, one click, no email required. You keep access through the end of the billing period. Origin members lose the $9-for-life lock if they cancel, but every other tier is fully reversible.
Yes. CyberSygn is ESIGN Act (United States) and UETA-compliant. The audit certificate captures every signing event, IP address, timestamp, and a SHA-256 fingerprint for every file that exists for the signing, each one labeled with the file it covers. Same legal weight as DocuSign or HelloSign in any U.S. jurisdiction.
No, ever. Here is the plain deal: free documents may be used, without any personal content, to improve our field detection. Paid documents never are. A document nobody finishes signing is deleted 30 days after it was created. A completed one, and the signed PDF we issue for it, is kept for the life of your account, and you can erase all of it yourself at cybersygn.io/erase.
No. Signers click a unique magic link and sign in their browser. No signup, no password, no app to install. The most-hated part of DocuSign-style flows is the part we removed.
Cancel anytime from your dashboard in one click, the next month does not bill, and you keep access through the end of the current period. Try the free Demo first (3 documents, no credit card) to confirm the detection works on your contracts before subscribing.
Pricing.
Most e-signature tools meter your documents and charge for every seat. CyberSygn does not. Pick a plan, send as many contracts as you want, cancel in one click. Start free, no card.
Most e-signature tools meter your documents or charge up to $45 a seat. Every CyberSygn plan is unlimited, and your first one's on us (3 free documents, no card).
Solo
Unlimited contracts, each one sent and signed in about two minutes.
Pro
Everything in Solo, plus the AI co-pilot that drafts and reads your contracts for you.
Just a few dollars more than Solo. Cancel in one click.
Studio
One shared workspace, every send in view.
Business
For a team that signs constantly and wants it wired into their own systems.
Try the Demo first. Your first one's on us (three free signs, no credit card). Confirm CyberSygn detects fields on your actual contracts before you pick a plan. Cancel any paid plan in one click, the next month does not bill.
Founding deals, while spots last
Origin
Every Solo feature, three dollars less, locked for the life of your account.
100 of 100 spots left. Then it closes forever.
Lifetime
Pay one time. Use every Solo feature for as long as the product exists.
50 of 50 spots left.
CyberSygn is part of Vyan OS. Run e-sign on its own with the plans above, or run your whole field operation, canvassing, weather intelligence, e-sign, and the rest, on one capped price. The Field OS bundle caps everything at $99 per seat a month, billed yearly, with CyberSygn included. See the Field OS bundle →
Compared.
Five things that matter for independents and small teams. Honest comparison; the numbers are pulled from public pricing pages as of May 2026.
| Feature | CyberSygn | DocuSign Personal | Dropbox Sign Essentials | SignWell Light |
|---|---|---|---|---|
| Automatic field detection | Yes | Manual placement | Manual placement | Manual placement |
| Monthly price | $12, unlimited | From $11 (annual), 5 docs / mo | $15 ($10 annual) | $12 ($10 annual), 1 sender |
| Unlimited documents | Yes | Capped at every tier | Yes, 5 templates | Yes, 1 sender |
| Signer accounts required | No | No | No | No |
| In-person mode | Yes | Yes | No | No |
| Audit certificate | Yes, SHA-256 | Yes | Yes | Yes |
| Origin rate (founder lock) | $9, locked for life | No | No | No |
Questions.
Honest answers. If yours is not here, write to hello@cybersygn.io and we will add it.
We ran field detection on all 499 real contracts in our test corpus and found signature fields in 499 of 499, plus 120 synthetic test PDFs across 12 detection categories. The detector walks the PDF operators and matches labeled patterns including Signature:, /s/, (Initial), Date:, X______, and [ ]. Word documents are converted to PDF in the browser before detection.
No. Signers click a unique magic link and sign in the browser. No signup, no password, no app to install.
Yes. CyberSygn replaces DocuSign, Dropbox Sign, and SignWell for the case where you do not want to drag and drop signature fields onto every document. The detection step is what is different. Every other capability (multi-signer routing, magic links, audit trail, signed PDF download) is parity with the competition.
Detection runs in your browser. The PDF never leaves your device during the detection step. When you send it for signature, the PDF is stored in Cloudflare KV, encrypted at rest. A document nobody finishes signing is deleted 30 days after it was created. Once every signer finishes, we build the signed PDF and keep it, the original, and the audit certificate for the life of your account, which is exactly what the certificate handed to each signer promises. The PII-free verification record is kept permanently, so cybersygn.io/verify works even if the files are later removed.
That the file you are holding is byte for byte the file CyberSygn issued when the document completed, and that a document with that fingerprint was completed on CyberSygn by that many signers on that date. Change one byte of the PDF and the fingerprint no longer matches.
It does not prove who the signers were. The verification record is PII-free on purpose: no name, no email, no document text, nothing that can be reversed back into any of those. Names, emails, IP addresses, and the full event timeline live on the audit certificate, which only the parties to the document receive.
It documents the audit trail: every event timestamp, IP, user agent, and a SHA-256 fingerprint for every file that exists for the signing, normally the signed PDF CyberSygn issued and the original it was built from. The certificate names which file each fingerprint was taken from, so you always know what to hash. Legal weight depends on jurisdiction. We are not lawyers. The certificate is evidence, not a guarantee.
Every plan is unlimited and starts with 3 free documents, no card required. Solo is $12 per month for the essentials. Pro is $19 per month and adds the AI co-pilot that drafts and reads your contracts, plus bulk send and priority support. Studio is $29 per month for a shared team workspace. Business is $79 per month for a whole team, adding the REST API, webhooks, and bulk send. Annual billing saves two months. Two early-adopter options remain while spots last: Origin at $9 per month locked for the life of your account (first 100 customers) and Lifetime at $299 one-time (first 50 customers).
Yes. Word files are converted to PDF in your browser before detection runs, so the entire pipeline post-upload is PDF-native.
Yes. Manage your subscription from the dashboard. Cancellation takes effect at the end of the current billing period. No phone call required.
Origin members.
One hundred Origin spots. Once they fill, the rate goes up and never comes back down. Origin members get the first production builds, a direct line to the founder, a vote on what we build next, and a permanent place on the Origin wall.
