Driansh Softtech

VoIP Development

FreeSWITCH development services for scalable voice platforms

We design, build and scale FreeSWITCH platforms, from custom modules and ESL integrations to softswitches and call centers, for telecom providers and product teams.
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Free consultation with our engineers

What we build with FreeSWITCH

FreeSWITCH development is how we turn an open-source telephony engine into a product your business can sell or run on. We write custom modules, dialplans and Lua or ESL applications, and connect FreeSWITCH to the billing, CRM and web systems you already use.

Our team works with telecom operators, VoIP providers and software companies that need voice, video or conferencing features without building a switch from scratch.

Technology we work with

  • FreeSWITCH
  • Kamailio
  • OpenSIPS
  • WebRTC
  • SIP
  • Lua
  • ESL
  • Node.js
  • PostgreSQL
  • Redis

What we offer

FreeSWITCH development services we offer

Custom module development

Add features FreeSWITCH doesn't ship with, written as maintainable C or Lua modules.

ESL & API integration

Control calls from your app and sync events with CRMs, billing and ticketing systems.

IVR & dialplan design

Build call flows, routing rules and self-service menus that match how your business works.

Multi-tenant platforms

Serve many customers from one FreeSWITCH cluster, each with isolated settings and branding.

Scaling & performance

Tune, cluster and load-balance FreeSWITCH so call quality holds up as traffic grows.

Support & upgrades

Keep existing deployments patched, monitored and upgraded to current FreeSWITCH releases.

Planning a FreeSWITCH project?

Tell us what you want to build. A FreeSWITCH engineer will review it and suggest the right architecture.
Talk to a FreeSWITCH engineer

What we build

Solutions we build on FreeSWITCH

Class 5 softswitch

Retail VoIP switching with hosted PBX features for service providers.
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Multi-tenant IP PBX

Hosted PBX you can resell to many business customers.
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Call center software

Inbound and outbound dialing, queues, recording and reports.
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Audio & video conferencing

Browser and phone conferencing with moderator controls.
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Voice broadcasting

Automated voice campaigns, alerts and reminders at scale.
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Unified communications

Voice, video, chat and presence in one platform.
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Why Driansh

Why teams choose Driansh for FreeSWITCH

Full VoIP stack

We also build with Kamailio, OpenSIPS and WebRTC, so one team covers signaling, media and apps.

You own the code

Source code and documentation are handed over, so you are never locked in to us.

Built to extend

Clean modules and APIs make it easy to add features later without rewrites.

Deploy anywhere

We ship to your data center, AWS, Azure or any cloud you prefer.

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

Planning a FreeSWITCH project?

Tell us what you want to build. A FreeSWITCH engineer will review it and suggest the right architecture.

Tell us about your project

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

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