Driansh Softtech

Open Source Development

SIP.js development services for browser calling apps

We build SIP.js web phones, click-to-call widgets and video features that register to your SIP server, so your users call straight from the browser.
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What we build with SIP.js

SIP.js development brings SIP calling into any web app using a JavaScript library built on WebRTC. We build web softphones, click-to-call buttons, video calls and agent panels that register to your existing SIP server.

On the server side, we set up Asterisk, FreeSWITCH or Kamailio for WebSocket and WebRTC media. You can hire one SIP.js developer or a small team, full time or per project. Either way, we test calls across Chrome, Firefox, Safari and Edge before your launch date.

Technology we work with

  • SIP.js
  • WebRTC
  • JavaScript
  • TypeScript
  • React
  • Vue
  • Angular
  • Asterisk
  • FreeSWITCH
  • Kamailio
  • Node.js

What we offer

SIP.js development services we offer

Web softphone development

Build a branded browser phone with dialpad, transfer, hold and call history for your users.

Click-to-call widgets

Add a call button to your site or app so visitors reach your team without dialing.

SIP.js integration

Embed calling into your CRM, helpdesk or SaaS product and link calls to customer records.

SIP server setup

Configure WebSocket, TLS and media on Asterisk, FreeSWITCH or Kamailio so SIP.js clients connect reliably.

Upgrades & debugging

Move older apps to current SIP.js versions and fix one-way audio, registration or NAT issues.

SIP.js consulting

Get advice on architecture, codecs and browser support before you commit to a build.

Adding calling to your web app?

Tell us about your app and SIP server. A SIP.js engineer will review it and suggest how to build it.
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What we build

Solutions we build with SIP.js

Audio & video conferencing

Browser meeting rooms that also accept SIP and phone callers.
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Call center agent panels

Web softphones built into the agent desktop.
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Unified communications

Calls, chat and presence inside one web workspace.
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Multi-tenant IP PBX

Browser phones for every tenant on your hosted PBX.
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Why Driansh

Why teams choose Driansh for SIP.js

Client and server

We build the SIP.js front end and the SIP server behind it, so calls work end to end.

Any front-end stack

We work in React, Vue, Angular or plain JavaScript, matching the code your team already uses.

You own the code

Source code and documentation are handed over, so your team can maintain the app freely.

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

Adding calling to your web app?

Tell us about your app and SIP server. A SIP.js engineer will review it and suggest how to build it.

Tell us about your project

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

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