Proof of Acknowledgment
Prove Who Read Your Documents
Get verifiable, cryptographic proof that anyone has read your documents. Recipients open a secure link — no account required. Covers employees, clients, partners, suppliers, and service providers.
Email Offers Zero Proof of Reading
When you send a critical document by email, you have no verifiable evidence the recipient actually read it. No audit trail, no legal protection, no compliance evidence. Security policies, GDPR notices, training materials, and contracts can all be contested. Ackify closes that gap with a tamper-proof, independently verifiable acknowledgment for every document you send — to anyone, inside or outside your organization.
Who Uses Ackify
Ackify is not limited to internal communication. Any document that must be provably read — by employees, clients, partners, suppliers, or service providers — can go through Ackify. Recipients receive a personalized reading link and never need to create an account.
- Employees
- Clients
- Partners
- Suppliers
- Service providers
- Contractors
How It Works
- 1
Upload your document
Upload any file — PDF, Word, Excel, or image. Ackify sanitizes it on upload and creates a unique, tamper-proof reading package for each recipient you specify.
- 2
Send to any email address
Paste or import a recipient list — any valid email address works. Each person receives a personalized, single-use reading link. No account creation required on their side.
- 3
Collect cryptographic proof
Every reading event is timestamped and signed with a cryptographic key. Download a legally admissible audit certificate at any time, suitable for compliance audits, legal disputes, and regulatory inspections.
Why Ackify
No account required for recipients
Anyone with an email address can read your documents — customers, suppliers, temporary contractors, or external partners. Zero sign-up friction, zero support burden for your team.
Cryptographic proof, not just a log entry
Every acknowledgment is signed with an Ed25519 key tied to the document, the recipient, and the timestamp. The audit certificate is independently verifiable — your legal team will appreciate the rigour.
Zero-knowledge mode available on Pro
On the Pro plan, zero-knowledge mode option means Ackify never decrypts your content — documents are encrypted client-side and the server only handles ciphertext. Full privacy, full proof.
GDPR-compliant by design
Documents are processed on European infrastructure (OVH, Scaleway). Data minimization, retention limits, and right-to-erasure workflows are built into the product, not bolted on.
Works with any file format
PDF, Word, Excel, PowerPoint, images — Ackify handles them all. Files are sanitized on upload and displayed in a secure viewer, preventing macro execution and malicious content injection.
Plans
Every plan includes the core acknowledgment engine and audit certificates. Upgrade to unlock more volume, branding, and advanced integrations.
Free
Up to 5 documents and 3 recipients per month. Ideal for individuals and very small teams getting started with proof of reading.
Starter
50 documents per month with up to 10 recipients each. Includes audit certificates, email reminders, and standard support.
Team
Unlimited documents for up to 20 workspace members. Advanced audit logs, custom branding, API access, and priority support.
Pro
Everything in Team plus unlimited members, SSO integration, zero-knowledge mode option, dedicated onboarding, and SLA-backed support for regulated industries.