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PX-COURIER · Secure file sharing

Email attachments are where confidential documents go to leak.

Panthryx Courier is secure file sharing built for law firms: every recipient verifies their identity, every file is scanned, every access is logged, and a forwarded link is useless to anyone it wasn't addressed to.

How it works

The attachment, replaced end to end

Verified recipients, not anonymous links

Every recipient verifies their own identity before anything downloads; no forwarded links, no anonymous access. Sharing with a client or opposing counsel means sharing with them, not with whoever ends up holding the URL.

Malware scanning on every file

Files are scanned before they reach a recipient, in both directions. The intake document from a new client gets the same treatment as the settlement agreement going out.

A complete audit trail

Who accessed what, when, and from where, recorded for every share and every file. When a matter turns contentious, the firm can show exactly where a document went and prove where it didn't.

Retention, expiration, and legal hold

Shares expire on schedule instead of living forever in an inbox. Retention follows firm policy automatically, and legal holds preserve files and their access history for as long as the matter demands.

Part of the Panthryx Portal

Courier works alongside Sentry mail protection, Watchtower identity threat detection, Data Rooms, and Document Management. Sensitive attachments in outgoing mail can be routed to Courier automatically, and managed security clients get the Portal as part of their engagement.

Common questions

What firms ask about Courier

What's wrong with sending documents as email attachments?

An email attachment is a copy you no longer control: it can be forwarded to anyone, sits unencrypted in inboxes indefinitely, and leaves no record of who opened it. For a law firm, that means privileged documents with no audit trail and no way to revoke access. Courier replaces the attachment with a verified, audited, revocable link. The document stays under the firm's control.

How is Courier different from Dropbox or a OneDrive link?

Consumer share links are anonymous: anyone holding the link can open the file, and forwarding it forwards the access. Courier verifies each recipient's identity before every download, so a forwarded link is useless to anyone it wasn't addressed to. Every access is logged with who, when, and from where; files are malware-scanned before delivery; and retention, expiration, and legal holds are enforced automatically.

What does receiving a Courier file look like for our clients?

No account creation, no software to install. The recipient opens the link, verifies their identity in a few seconds, and downloads the file from the firm's branded page. If opposing counsel forwards the link, it simply doesn't work for anyone else.

Does Courier support retention policies and legal holds?

Yes. Shares expire automatically on the schedule you set, retention follows your firm's policy rather than someone's memory, and legal holds preserve files and their complete access history for as long as the matter requires.

Getting started

See Courier on your own documents.

Tell us how your firm shares files today and we'll show you what the same workflow looks like through Courier: verified, scanned, and audited.