Cryptographic Integrity & Audit Trails

The challenger to legacy e-signatures.

Outsigner provides sovereign, SHA-256 cryptographic document sealing and immutable audit trails for modern teams. Zero bloat, instant verification, predictable economics.

Open DashboardExplore Architecture
envelope_audit_trail_0x8f2a.pdf
SHA-256 SEALED

Document Hash

e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Signer Verification

IP: 194.230.14.88

Timestamp: 2026-11-05T23:57:00Z

Legal Evidence

Tamper-Proof Audit Trail

Recorded & immutable metadata

Designed as an agile challenger.

Legacy providers force complex pricing quotas and bloated CLM suites. Outsigner focuses on speed, mathematical proof, and cost control.

Legacy Industry Giants

  • ×Expensive per-envelope quotas (costs escalate at scale)
  • ×Heavy enterprise features forced onto simple agreements
  • ×Complex multi-step recipient onboarding friction
OUTSIGNER APPROACH

Outsigner

  • Predictable flat-rate pricing & near-zero marginal cost
  • SHA-256 cryptographic proof + automated Audit Trail PDF
  • Ultra-fast 1-click signing link flow for signers

Security & Legal Proof

Built on standard cryptographic primitives to ensure strict data non-repudiation and integrity.

SHA-256 Hashing

Every PDF is hashed client/server side upon upload. Any single byte modification breaks the mathematical match instantly.

Audit Trail Certificate

Consolidates IP address, User-Agent, UTC timestamps, recipient verification, and explicit consent in a tamper-proof log.

Sovereign Architecture

Data strictly isolated with Row-Level Security (RLS) on PostgreSQL infrastructure, keeping your documents private and protected.

Simple, transparent pricing

No envelope quotas. No hidden overage penalties.

Pro Pass

$19 / month

For freelancers, agencies, and growing B2B teams.

  • Unlimited Envelopes & Signatures
  • SHA-256 Sealing & Audit Trail PDF
  • Real-time Status Tracking & Emailing
  • Supabase Vault Encryption
Start Free Trial