Driansh Softtech

Open Source Development

Linphone app development for branded SIP softphones

We turn the open-source Linphone SDK into your own softphone for Android, iOS and desktop, connected to your PBX or softswitch and published under your brand.
Talk to a Linphone engineerSee what we build

Free consultation with our engineers

What we build with Linphone

Linphone app development gives you a working SIP softphone without writing a VoIP client from scratch. We start from the open-source Linphone SDK and apps, then add your branding, provisioning and the features your users need.

We build for VoIP providers that want an app for their subscribers, and for companies that want a private calling app for staff. Our mobile and VoIP engineers work on the same project, so app and server settings match.

Technology we work with

  • Linphone SDK
  • SIP
  • Kotlin
  • Swift
  • C++
  • PushKit & FCM
  • SRTP / ZRTP
  • Opus
  • Asterisk
  • FreeSWITCH

What we offer

Linphone app development services we offer

Linphone consulting

Review your goals and VoIP setup, then recommend the platforms, features and licence path that fit.

White-label apps

Replace Linphone branding with your name, logo and colours, so you can publish the app as your own.

Custom features

Add screens, call features or account flows Linphone lacks, so the app matches how your users work.

PBX & softswitch integration

Connect the app to your IP PBX, softswitch or billing APIs, with automatic account provisioning.

Push notifications

Wake the app for incoming calls and messages, so users stay reachable without draining battery.

Troubleshooting & updates

Fix audio, registration and NAT issues, and keep the app current with new OS and SDK releases.

Want your own SIP softphone app?

Tell us your platforms, PBX and must-have features. A Linphone engineer will reply with a plan and estimate.
Talk to a Linphone engineer

What we build

Where our Linphone apps are used

Multi-tenant IP PBX

A branded mobile extension for every user on your hosted PBX.
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Class 5 softswitch

A subscriber app for retail VoIP providers running their own switch.
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Calling card apps

Mobile dialers with balance checks for prepaid calling services.
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Unified communications

Voice, video and chat in one app alongside your UC platform.
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Mobile app development

Full native app builds when you need more than a softphone.
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Why Driansh

Why choose Driansh for Linphone

Mobile and VoIP skills

One team handles the native app and the SIP server side, so problems don't bounce between vendors.

You own the code

Source code, signing setup and documentation are handed over when the project is done.

Every platform

We build for Android, iOS and desktop from the same SDK, so features stay consistent.

Built to update

We keep your changes separate from SDK code, so new Linphone releases are easier to merge.

How we work

From idea to live platform in four steps

  1. 01

    Discover

    We review your requirements, traffic and existing stack, then agree scope, milestones and cost.

  2. 02

    Design

    We plan the architecture, integrations and failover so the platform fits your growth plans.

  3. 03

    Build & test

    We develop in short sprints with regular demos, then load-test and QA before go-live.

  4. 04

    Deploy & support

    We launch on your servers or cloud and stay on for monitoring, fixes and upgrades.

Frequently asked questions

Get in touch

Want your own SIP softphone app?

Tell us your platforms, PBX and must-have features. A Linphone engineer will reply with a plan and estimate.

Tell us about your project

Share a few details and the right engineer will get back to you.

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