E-signatures that hold up.
Built by Armorstack, a cybersecurity company — not an e-signature vendor that added security as an afterthought. Every document is sealed with SHA-256 and recorded in an append-only ledger that can't be quietly changed.
14-day free trial · Cancel anytime · Your documents stay yours.
Signature
Jane Q. Signer
ESIGN & UETA
Legally binding across the United States
SHA-256 integrity
Every document hashed & verifiable
Append-only audit
Tamper-evident chain of custody
7-year archive
Immutable, object-locked storage
Cybersecurity-native
Built by Armorstack security engineers
How it works
Signed in three steps
From upload to a court-ready record in minutes — no add-ons, no integration tax.
Upload your document
Drag in any PDF. No templates required — though you can save them.
Place fields & send
Drop signature, date, text, and checkbox fields anywhere, then email it to your signers.
Get a defensible record
Signers complete it on a branded page. Everyone gets a tamper-evident PDF + verify link.
Security-first e-signatures
Built for trust, designed for speed
All the e-signature essentials — plus the evidence that makes them defensible.
Drag-and-drop field placement
Place signature, text, date, and checkbox fields on any PDF with pixel-faithful accuracy on desktop and mobile.
Certificate of Completion
Every signed document gets a branded trust page: signer, consent, IP, timestamps, and the document hash.
Tamper-evident integrity
We hash every document with SHA-256 and record it in an append-only ledger — alteration is detectable.
Secure link signing
Signers get a single-use secure link and sign on a clean, branded page — no account required.
Public verification
Anyone with the link can confirm a document is authentic and unaltered — no login, no PII exposed.
Self-serve, in minutes
Sign up, place fields, and send your first document today. Simple monthly pricing, cancel anytime.
Security & compliance
A signature is only as good as its evidence
ArmorSign captures the four things that make an electronic signature stand up: intent, consent, identity attributes, and document integrity — and records them in a way that resists tampering.
- Consent-to-electronic-records capture on every signature
- SHA-256 hash recorded before and after the certificate
- Append-only, hash-chained audit log — no edits, no deletes
- 7-year immutable, object-locked archival of signed records
- Per-account data isolation and encrypted transport
31%
of businesses cannot produce a complete compliance record for their e-signatures when auditors ask. ArmorSign is built so that question has an answer before it's asked. Industry research, 2024
Document integrity (SHA-256)
3f9a7c1d…b21e9f04 ✓ verified
For every agreement
Your first signature is minutes away
Start free for 14 days. Upload a document, place your fields, and send it for signature today.
Questions
Frequently asked
Are ArmorSign signatures legally binding?+
Yes. ArmorSign is built to satisfy the U.S. ESIGN Act and UETA by capturing intent, consent, and a tamper-evident integrity record. Each signed document includes a Certificate of Completion you can present as evidence.
Do my signers need an account?+
No. Signers receive a secure single-use link by email and sign on a branded page — no account or signup required.
How do you prove a document wasn't altered?+
We compute a SHA-256 hash of the signed document and record it in an append-only, hash-chained audit log. Anyone with the verify link can confirm the document is authentic and unchanged.
How long are signed documents kept?+
Completed records are stored in immutable, object-locked storage for up to seven years.
Can I cancel anytime?+
Yes — cancel from your account at any time. See our Refund Policy for details.