How Sheerbit Builds Custom WebRTC Softphones for Global Clients

In today’s hyperconnected world, voice and video communication tools are at the core of business operations. With WebRTC (Web Real-Time Communication) revolutionizing browser-based calling, Sheerbit stands out by offering end-to-end custom WebRTC softphone development tailored to diverse industry needs. From real-time voice to secure video conferencing and advanced SIP signaling, Sheerbit crafts intelligent, secure, and scalable softphones used by global telecom providers, startups, and enterprises alike.

What Is a WebRTC Softphone?

A WebRTC softphone is a software application or web interface that allows users to make audio and video calls over the internet using WebRTC protocols. It requires no plugins or downloads and enables real-time communication directly through browsers or custom-built mobile/desktop apps.

Key Features:

• Audio and video calling
• Screen sharing
• Text chat
• End-to-end encryption
• SIP integration
• NAT traversal and STUN/TURN support
• Call recording and logs

Sheerbit’s Custom WebRTC Softphones: An Overview

Sheerbit doesn’t deliver cookie-cutter solutions. Each softphone is tailor-made based on:

• Client’s telecom infrastructure
• Compliance needs (HIPAA, GDPR, etc.)
• User base size and region
• Integration with CRM, billing, helpdesk, etc.
• Unique branding and UI/UX requirements
• Advanced features like analytics, AI bots, voicemail, call logs

Step-by-Step: How Sheerbit Builds a Custom WebRTC Softphone

1. Requirement Discovery and Consultation

Sheerbit begins every project with a detailed consultation phase, where client stakeholders are interviewed to assess their goals, user workflows, and communication needs. This helps define the project scope and feature set accurately.

2. Technical Architecture and Stack Planning

After gathering requirements, the engineering team designs the architecture using the right tools and frameworks. This includes selecting SIP.js, JsSIP, or PJSIP for signaling, determining TURN/STUN servers, and choosing between peer-to-peer or server-based media handling using Janus, Jitsi, or Kurento.

3. UI/UX Design with Custom Branding

Using Figma, Sheerbit’s design team creates wireframes and interactive prototypes that reflect the client’s brand. The UI is optimized for cross-platform use (mobile/web) and accessibility (WCAG standards).

4. Core WebRTC Softphone Development

In this phase, the actual softphone logic is built. This includes SIP registration, audio/video media handling, codec negotiation, signaling via WebSockets, DTMF tones, push notifications for mobile, and advanced call controls (mute, hold, transfer).

5. Backend & SIP Infrastructure Integration

The softphone is then integrated with the client’s SIP infrastructure. Sheerbit connects the softphone with Asterisk, FreeSWITCH, or hosted SIP services while managing NAT traversal, call routing, and session control via Kamailio or OpenSIPS proxies.

6. Security & Compliance Layer

Security is a critical layer in Sheerbit’s builds. All WebRTC connections are protected using DTLS and SRTP. SIP signaling is done over secure WebSockets (WSS), with TLS for backend API calls. The architecture is also designed to comply with regional regulations like GDPR and HIPAA.

7. Testing & Quality Assurance

Rigorous QA testing is conducted, including unit tests, SIP load tests using SIPp, browser and device compatibility checks, and media quality checks under different network conditions (jitter, packet loss, 3G/4G/WiFi scenarios).

8. Deployment and DevOps

Sheerbit supports cloud, hybrid, and on-prem deployments using AWS, Azure, and Docker/Kubernetes environments. CI/CD pipelines are set up with GitHub Actions, Jenkins, or GitLab CI, ensuring automatic deployments and rollbacks.

9. Post-Deployment Support & SLA

Once live, Sheerbit continues to monitor performance and offers bug fixing, feature upgrades, and performance optimization under dedicated SLA contracts. Clients get access to dashboards, log systems, and ticketing portals for full transparency.

Global Use Cases

• Telecom Providers: White-labeled softphones for IMS/SIP core networks
• Startups: In-app voice/video calling for edtech, fintech, and healthtech
• Call Centers: Browser-based softphones integrated with CRMs
• Healthcare: HIPAA-compliant doctor-patient consultation tools
• Enterprise Teams: Secure internal calling and conferencing platforms

Why Choose Sheerbit?

• 100% custom-built solutions
• End-to-end SIP, VoIP, and WebRTC expertise
• Enterprise-grade security & compliance
• Stunning, branded UI/UX design
• Flexible deployment and DevOps pipelines
• Post-deployment support with SLAs

Client Success Story

Project: White-label Softphone for a European Telecom Provider

Challenge: Deliver a secure, browser + mobile softphone that integrates with the telecom's IMS system, supports auto-provisioning, in-app billing, call recording, and GDPR compliance.

Solution:

• Web + iOS + Android softphone apps
• SIP over WebSocket using JsSIP
• QR-based provisioning for user registration
• Kamailio + RTPproxy integration
• In-app balance top-up using payment gateway

Results: Deployed within 90 days. Over 40,000 users onboarded in 6 months. 99.99% uptime. Integrated call analytics dashboard in phase 2.

Future Roadmap

• AI-powered call summarization
• Real-time voice translation
• Voice biometric authentication
• Intelligent call routing with AI bots
• 5G-optimized ultra-low latency codecs

Conclusion

With WebRTC transforming real-time communication, businesses need a trusted partner to build reliable, secure, and scalable softphones. Sheerbit brings deep telecom expertise, full-stack development capabilities, and a client-first approach to deliver world-class WebRTC softphones used across industries and continents.

Call-to-Action

Looking to build your own WebRTC Softphone?
Let Sheerbit help you launch a secure, scalable, and beautifully designed softphone tailored to your business needs.

FAQs

1. Does Sheerbit offer mobile apps too? – Yes, Android and iOS apps using PJSIP or Flutter WebRTC.
2. Which SIP servers do you support? – Asterisk, FreeSWITCH, Kamailio, OpenSIPS.
3. Can you integrate the softphone with a CRM? – Yes, including Zoho, Salesforce, and custom CRMs.
4. Is it fully white-label? – Absolutely. Logos, themes, UI elements, everything is customized.
5. Do you offer support post-deployment? – Yes. We provide SLA-based technical and feature support.
6. What’s the development timeline? – 4 to 12 weeks based on the features and platforms needed.
7. Do you provide call analytics? – Yes, including duration, call quality scores, and user metrics.
8. Can the softphone record calls? – Yes, with client-side or server-side options.
9. Is your solution secure? – Yes, it includes SRTP, DTLS, WSS, JWT tokens, and full audit logs.
10. Can you migrate from legacy VoIP apps? – Yes. We handle SIP migration and provisioning automation.