Private Voice Communication

Protect the identities of your customers on voice calls to improve privacy and avoid off-platform transactions

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Facilitate communication while protecting privacy

Protect user privacy
  • Protect users’ privacy by connecting them without exposing their real phone numbers.
Avoid revenue leakage
  • Keep conversations between users on your marketplace to avoid off-platform transactions.
Gain new insights
  • Track, record, and analyze calls to gain new insights on your business.
How it works
Connect your marketplace users without exposing their phone numbers
A user places a call from your app
A user on your service calls a local virtual number to hail a ride, book a place to stay, or to purchase an item from a seller in your marketplace.
The other party picks up
Nexmo’s platform connects the caller with the other party in your marketplace. Neither party sees the other party’s personal phone number; they see only the virtual number your application provisioned for the service.
The conversation takes place
With their personal phone numbers masked, the parties talk and possibly come to an agreement — for a ride, for goods to be purchased through your marketplace, or whatever it may be.
Analyze trends and discover insights
Though the parties can’t see each others’ number, you can. You can generate reports from the console to understand who spoke with whom and when, analyse trends and discover insights that are important to your business. If the call was recorded, it can be transcribed and analyzed for further insights.


Step-by-step guide to building an private voice application


Connect callers without the pitfalls

Voice quality degradation
To mask phone numbers, two separate call legs are conferenced together increasing latency and potentially making voice delays quite noticeable.
Paying for resources you don’t use
Do you need to over-provision (and pay for) phone numbers to make sure you don’t run out? Do you need to pay for unused call time given typical per-minute billing practices?
Poor transcription accuracy
With two people talking on the same line, can you easily record each person to get accurate transcriptions?
Lack of detailed and real time data
Can you measure volume, cost and get all the call detail record you need? Can you get real-time data on calls so you can better analyze your business or even change the call flow in response to real time events?


With Nexmo, we do not have to worry about establishing and maintaining relationships with individual carriers, and we don’t have to teach our developers to communicate in non-standard ways. We couldn’t be more satisfied with both the quality and ease of use of Nexmo
Glenn Lee
Senior Product Manager for CentraCX
Quality, Support, Scalability