Secure documents, signed and audit-trailed.
doxio lets your team share documents with clients behind one-time-code access, collect legally-meaningful e-signatures, and keep a tamper-evident audit trail of every step.
No charge until the trial ends. Cancel anytime.
Everything in one place
From upload to signed, in one secure flow
Stop emailing PDFs and chasing signatures. doxio handles sharing, identity, signing, and the audit trail.
Gated document sharing
Share a document with a single recipient behind an email one-time code. No public links, no raw file URLs — access is scoped to the share.
Audit-trailed e-signatures
Recipients review and sign in the browser. doxio pins the exact version they signed and stamps a certificate page with the full audit trail.
Tamper-evident audit log
Every view, code, and signature is recorded in an append-only, hash-chained log — so you can prove exactly what happened and when.
Client workspaces
Organize documents and signatures by client. Your whole team works in one tenant-isolated organization with role-based access.
How it works
Three steps to a signed document
Upload your PDF
Drop in the document you need reviewed or signed. It's stored encrypted and scoped to your organization.
Share with a one-time code
Send a secure link. The recipient verifies with an emailed code before they can open the document — no account needed.
Collect the signature
They sign in the browser. doxio finalizes an immutable signed copy with a certificate page and notifies you.
Security first
Built so security isn't an afterthought
doxio is engineered around a short list of non-negotiables, enforced in code and tests.
One-time-code access
External recipients prove their identity with a short-lived emailed code before any bytes are served. Secrets are stored only as hashes.
Strict tenant isolation
Every query is scoped to your organization from a server-validated session. Your data is never reachable by another tenant.
Version-pinned signing
Signers can only ever sign the exact bytes that were shared. The signed copy is immutable and stored separately from the original.
Hash-chained audit log
An append-only, hash-chained trail makes tampering evident. Billing and entitlements flip only on verified payment webhooks.
Frequently asked questions
Is a doxio signature legally binding?
doxio captures a clear electronic signature with a full audit trail (signer, time, IP, and the exact document version). It is a visual signature plus evidence, not a qualified PAdES certificate — suitable for most agreements. For qualified signatures, consult your legal counsel.
Do recipients need an account?
No. External recipients open and sign documents using a secure link plus an emailed one-time code. Only your team members need doxio accounts.
Where is my data stored?
Documents and data are hosted on Railway infrastructure, EU-pinned (application, database and object storage all run in EU regions). See our Sub-processors page for the full list.
Can I cancel anytime?
Yes. Every plan starts with a 14-day trial and can be cancelled at any time from your billing settings — no charge until the trial ends.
Start sending documents for signature today
Set up your organization in minutes and send your first secure document on the free trial.