Evidence-First E-Signature
Not just signed. Cryptographically proven.
Every signed document becomes a tamper-proof evidence package — designed to protect your business if a signature is ever questioned, disputed, or challenged.
Abundera Sign provides technical and evidentiary records. Admissibility, sufficiency, and litigation strategy depend on jurisdiction, facts, and counsel.
How It Works
Three steps to a proven document
Create & Send
One API call with template ID, signers, and fields. Or use the dashboard. Signing links go out instantly via email.
Sign Anywhere
Signers open a secure link. Optional access code gate. Type, draw, or upload signatures. Plain-English summary helps signers understand the document. Every action recorded.
Sealed & Proven
Completed docs get a Certificate of Completion, cryptographic proof page, PAdES digital signature, RFC 3161 timestamp, and tamper-evident seal. Download link emailed to all parties. Webhook fires instantly.
Don't take our word for it
Try it, verify it, inspect it
Features
Evidence features most e-sign tools don't even try to provide
31 features across evidence, identity, workflow, and governance. PAdES signatures, RFC 3161 timestamps, hash chains, and more — on every plan.
Explore All FeaturesEvidence Infrastructure
What happens to your signature after you click "Sign"?
Most platforms stop at a basic audit log. We build a cryptographic evidence package that can be independently verified years from now.
| Feature | Abundera Sign | DocuSign | Adobe Sign | Others |
|---|---|---|---|---|
| PAdES-LTA Digital Signature (full LTV) | ✓ | Partial | ✓ | ✗ |
| AATL Certificate (green checkmark in Adobe) | ✓ | ✗ | ✓ | ✗ |
| Dual RFC 3161 Timestamps | ✓ | ✗ | ✗ | ✗ |
| Hash-Chained Audit Trail | ✓ | ✗ | ✗ | ✗ |
| Bitcoin Blockchain Anchoring | ✓ | ✗ | ✗ | Zoho only |
| 6+ External Verification Anchors | ✓ | ✗ | ✗ | ✗ |
| Dual-Chain OCSP Embedding | ✓ | ✗ | ✗ | ✗ |
| Public Document Verification | ✓ | ✗ | ✗ | ✗ |
| Court-Ready Declaration Generator | ✓ | ✗ | ✗ | ✗ |
| AI Contract Summary (20 languages) | ✓ | ✗ | ✗ | ✗ |
Patent Pending
Personal Document Seal
Every signer gets a unique verification code tied to the exact document content. Add it to Google Authenticator, Authy, or any authenticator app — and verify your document hasn't changed, anytime, anywhere, even offline. No other e-signature platform offers this.
Document-Bound
The code is generated from a unique digital fingerprint of the entire document — every word, every field, every signature. Change one character and the code breaks.
Tamper-Proof
Uses the same security standard that protects online banking and cryptocurrency. It's virtually impossible to alter the document without changing the fingerprint.
Offline Verification
Works entirely offline from your authenticator app. No server, no internet, no trust in any third party required. Open your app and compare the code.
Pricing
Stronger records cost much less than the disputes they prevent
Plans from $29/mo. No per-seat fees. Full comparison table, API examples, and FAQ on the pricing page.
View Pricing & PlansEasy Migration
Considering an alternative to DocuSign or Adobe?
Abundera Sign covers the core signing workflow with stronger evidence. No vendor lock-in, no painful migration, no data left behind.
Modern REST API
91 endpoints covering envelopes, templates, webhooks, and embedded signing. API-first design — included on every plan.
331 Ready-to-Use Templates
Legally reviewed templates across 30+ categories. Create custom templates via API or portal — no migration needed.
No Vendor Lock-In
Download signed PDFs, audit trails, and evidence packages anytime. Your documents are yours — sealed with open standards, not proprietary formats.
See It Live
Experience the full signing flow in 60 seconds
We'll send you a real NDA to sign. See the signing experience, plain-English document summary, cryptographic proof page, and Certificate of Completion — all with your name on it.
Join the Waitlist
We launch June 1, 2026. Join the waitlist for priority onboarding, or lock in Founding Member pricing now.
Get in Touch
Have questions about pricing, integrations, or legal compliance? We typically respond within one business day.