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Collaboration · End-to-end encrypted · HIPAA-grade

Secure Messaging.

Direct messages and channels for your team, end-to-end encrypted and built right into the workspace where you write. Messages are encrypted on your device before they leave it, so ProWriter can never read your chats. Like a team chat, but built on HIPAA-grade, 21 CFR Part 11 infrastructure.

Get startedHow E2E works

End-to-end encrypted

Every message is encrypted with keys that live on your device, not on our servers. ProWriter cannot read your channels or your DMs, even if asked to.

Channels and DMs

Spin up channels scoped to a team or a single workspace, or message a teammate directly. Conversations sit in the same place as the documents you are working on.

Real-time

Typing indicators, presence, delivery and read receipts, and unread counts keep the conversation live across everyone's devices.

End-to-end

We cannot read your messages.

Keys are generated on your device. Messages are encrypted before they leave your machine. Decryption happens only on the recipient's device.

Keys on your device.

Each conversation has its own key, shared securely between members using public-key exchange. Messages are encrypted with that key and signed by the sender, so recipients can verify who sent what. Your private keys never leave your device unencrypted.

On your device S. Cooper types message
↓ encrypt with R. Franklin's public key
↓ sign with S. Cooper's identity key

In transit→ ciphertext only, TLS 1.3 + E2E layer

ProWriter servers⊘ cannot decrypt
⊘ cannot subpoena to readable text

On R. Franklin's device↓ decrypt with R. Franklin's private key
↓ verify S. Cooper's signature
→ plaintext shown
Features

What's inside.

The messaging primitives your team expects, channels, direct messages, and live status, with end-to-end encryption underneath all of it.

  1. CH
    Channels & DMs

    Create channels scoped to a whole team or a single workspace, or send a one-to-one direct message.

  2. E2E
    End-to-end encryption

    Messages are encrypted on your device and signed by the sender. ProWriter's servers only ever hold ciphertext.

  3. KEY
    Key backup & recovery

    Your private keys are protected by a PIN and a set of recovery questions, so you can restore access on a new device without exposing them.

  4. DEV
    Multi-device

    Register the devices you use, and revoke one at any time so it can no longer decrypt your conversations.

  5. RT
    Live status

    Typing indicators, presence, delivery and read receipts, and unread counts across the conversation.

Compared

Why not just use Slack?

Slack · generic chat
General-purpose
  • Not end-to-end encrypted by default
  • Provider holds the encryption keys
  • Admins and employees can access content
  • Chat lives separate from where you write
  • Not tied to your documents or workspace
ProWriter Secure Messaging
Built into the workspace
  • End-to-end encrypted by default · always
  • Keys live on your device, not our servers
  • ProWriter cannot read your channels
  • In the same workspace as your documents
  • Team and workspace channels, plus direct messages
" Our IT team finally approved messaging, because nobody can read it, including ProWriter. "
IT Director · clinical-stage biotech
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