VoicePro Secure
End-to-end encrypted voice and messaging, carried on a network built so that we cannot read it. Encryption keys are created on your device and never touch ours - so your conversations stay yours. A private call in the app, or encrypted comms deployed across your whole organisation.
What it
does
Standard telecoms carry your calls as unencrypted audio and your texts as plaintext through message centres. Any intermediary with network access - a carrier, an interception system, compromised equipment - can read or record them. For privileged legal advice, clinical discussions or the boardroom, that is a compliance liability.
VoicePro Secure closes that gap. Calls and messages made in the app are end-to-end encrypted, and VoicePro Plus operates as a zero-knowledge carrier: we route the ciphertext but never hold the keys, so your content is structurally unreadable to us, and to anyone we could be compelled to hand it to.
Use it privately in the VoicePro app for £9.99/month (included on Business+ Elite), or deploy the same encrypted voice and messaging across your organisation - built for legal, healthcare and financial services, where confidentiality is a regulatory obligation, not a feature.
The process,
step by step
From the key on your device to the sealed packet on our network - here is exactly why nobody in the middle, including us, can open your conversations.
Keys made on your device
Every call and conversation generates its keys in your phone's secure hardware. They are never exported and never transmitted to us.
Handshake, device to device
Voice uses DTLS-SRTP; messaging runs a 3DH exchange over Curve25519. The key agreement happens directly between the two devices - we route the sealed packets but never take part.
A fresh key every time
A new key for every call and every message, so past conversations cannot be recovered from a device's current keys. Forward secrecy by design.
We carry ciphertext, not keys
Your content is unreadable at every point in our network. We deliver the envelope; we cannot open it, and cannot be compelled to.
Keys made on your device
Every call and conversation generates its keys in your phone's secure hardware. They are never exported and never transmitted to us.
Handshake, device to device
Voice uses DTLS-SRTP; messaging runs a 3DH exchange over Curve25519. The key agreement happens directly between the two devices - we route the sealed packets but never take part.
A fresh key every time
A new key for every call and every message, so past conversations cannot be recovered from a device's current keys. Forward secrecy by design.
We carry ciphertext, not keys
Your content is unreadable at every point in our network. We deliver the envelope; we cannot open it, and cannot be compelled to.
Built for
performance
Content confidentiality enforced by cryptography, not policy - the same class of protection as the best secure messengers.
Under the
hood
Integrate it, or deploy it
Build encrypted voice and messaging into your own product over API and SDK, or run it for your whole team. Choose the deployment model that fits your obligations.
Built for
your operation
Where confidentiality carries legal weight, encryption is the compliance posture, not a feature. Choose the deployment that fits your obligations.
Law firms & chambers
Solicitor-client privilege we cannot access, and therefore cannot be compelled to disclose.
Get in touchClinicians & providers
ePHI encrypted in transit to HIPAA technical-safeguard requirements, on dedicated infrastructure for covered entities.
Get in touchTrading & advisory
Meet call-recording obligations with archives encrypted under keys you hold. We do not record - you do.
Get in touchWhat it
doesn't do
Encryption is a precise promise, not a magic shield. Any product that claims to put you beyond the reach of a determined state actor is not being straight with you.
It protects the line, not the phone
Encryption stops us, your carrier and the network reading you. It cannot protect a phone already taken over by spyware or an unlocked handset - true of every encrypted app.
It hides content, not metadata
The network still sees that a call or message happened, when, and for how long - just not what was said. Hiding the fact of contact takes more than encryption.
It secures the app, not the SIM
Ordinary mobile calls and texts, on any network including ours, are standard carrier service and not encrypted. Secure covers app-to-app messaging and calls.
It works when you verify
The guarantee holds once you confirm the person is who they say they are. The app does this with a one-tap device check that blocks impersonation.
Ready to activate
VoicePro Secure?
£9.99/month in the VoicePro app, included on Business+ Elite - or talk to us about deploying encrypted voice and messaging across your organisation.