What Does CelloIP Technologies Offer?
CelloIP Technologies is a VoIP, WebRTC, and custom software development company with 12+ years of experience. We offer VoIP development (Asterisk, FreeSWITCH, OpenSIPS, Kamailio, FusionPBX), WebRTC solutions, AI voice bot and voice agent development (LiveKit, Retell AI, VAPI), full-stack web development (React, Next.js, NestJS, Node.js), mobile app development (Flutter, React Native, Swift, Kotlin), and cloud/DevOps infrastructure on AWS and GCP.
What Industries Does CelloIP Technologies Serve?
CelloIP serves clients across telecom, healthcare, real estate, education, finance, and enterprise sectors. Our VoIP and WebRTC solutions power contact centers, UCaaS platforms, telemedicine apps, real estate CRMs, e-learning platforms, and AI-powered IVR systems globally.
Where Is CelloIP Technologies Located?
CelloIP Technologies is headquartered in Ahmedabad, India, and serves clients worldwide with remote-first engagement models. Our founder, Kaushik Parmar, has 12+ years of VoIP and WebRTC expertise and leads a team of 20+ engineers across VoIP, mobile, and cloud development.
How Do I Get Started with CelloIP Technologies?
Start with a free consultation by visiting celloip.com/contact-us. We respond within 24 hours, define scope and timeline within 48 hours, and can onboard a dedicated developer or project team within 1 week. Hourly rates start from $25/hr with monthly retainer packages from $4,000/month.
Full-Stack Telecom & Software
Development Services
CelloIP Technologies builds carrier-grade VoIP platforms, WebRTC applications, AI voice agents, MVNO/MVNE software, and custom telecom solutions — from architecture to production deployment.
What We Build
Core Service Areas
Six practice areas covering every layer of modern telecom and communication software.
VoIP Platform Development
Custom SIP servers, softswitches, PBX systems, and carrier-grade VoIP infrastructure built on Asterisk, FreeSWITCH, OpenSIPS, and Kamailio.
WebRTC Development
Browser-to-browser and browser-to-SIP real-time communication: click-to-call, video conferencing, WebRTC gateways, TURN/STUN, and media servers.
AI Development
LLM-powered voice agents, RAG pipelines, GPT-4 IVR, Whisper ASR integration, AI chatbots, and intelligent automation for telecom and enterprise.
Mobile App Development
Cross-platform VoIP dialers, SIP softphones, Flutter/React Native apps with CallKit (iOS) and ConnectionService (Android) deep integration.
Custom Software Development
Full-stack web and mobile application development: React, Next.js, Node.js, NestJS, and backend APIs for telecom and enterprise SaaS products.
Cloud & DevOps
Kubernetes orchestration, CI/CD pipelines, AWS/GCP deployments, Docker containerisation, and 24/7 SRE support for high-availability telecom platforms.
Video Calling App Development
Custom video calling and conferencing apps on Flutter/React Native, backed by self-hosted LiveKit or WebRTC — 1:1 calls, group conferencing, telehealth, live streaming. No per-minute fees.
VoIP Mobile App Development
Custom SIP-based VoIP apps for iOS and Android — PJSIP, Linphone, Flutter, React Native — with native CallKit/PushKit and ConnectionService/FCM incoming call handling.
WebRTC Mobile App Development
Custom real-time voice, video, and data apps on native WebRTC for iOS and Android — self-hosted SFU/TURN infrastructure, no mandatory per-minute API fee.
Chat & Messaging App Development
Custom Flutter/React Native chat apps with Signal Protocol end-to-end encryption, media sharing, and integrated voice/video calling. Fully owned, not a clone script.
VoIP & Telecom
VoIP Technology Stack
Deep expertise across every major open-source and commercial VoIP platform. From PBX to carrier-grade softswitch.
Asterisk Development
Custom dialplans, AGI/ARI scripting, FreePBX modules, AI IVR
FreeSWITCH Development
ESL applications, mod_verto WebRTC, high-concurrency softswitch
OpenSIPS Development
SIP proxy, load balancing, dispatcher, carrier-grade routing
Kamailio Development
SBC configuration, TLS/SRTP, fraud prevention, SIP edge proxy
FusionPBX Development
Multi-tenant PBX, custom modules, GUI extensions, provisioning
IP PBX Development
On-premise and cloud IP PBX for SMB and enterprise deployments
Class 5 Softswitch
Carrier-grade Class 5 softswitch with billing and routing engine
Class 4 Softswitch
Wholesale carrier-to-carrier routing with LCR engine and high-CPS SIP
VoIP Billing Software
CDR processing, prepaid/postpaid billing, rate management, invoicing
SIP Trunk Solutions
SIP trunk provisioning, DID management, failover, load balancing
AI VoIP Integration
GPT-4 + Whisper IVR, voice bots on Asterisk/FreeSWITCH, LLM agents
Call Center Software
ACD, predictive dialler, agent dashboard, CRM integration, wallboard
Voice Bot Development
AI phone agents with STT→LLM→TTS pipeline, SIP integration, HIPAA ready
Real-Time AI
LiveKit Development
CelloIP is a specialist LiveKit implementation partner — AI voice agents, SIP trunking, custom SFU deployments, and Agents SDK integrations.
LiveKit Development
Custom LiveKit rooms, recording pipelines, SFU configuration
LiveKit Voice Agents
AI voice agents with Agents SDK, STT/TTS/LLM orchestration
LiveKit SIP Integration
SIP trunk to LiveKit bridge, PSTN connectivity, Asterisk integration
LiveKit App Development
Custom video, voice AI, and live streaming apps on Flutter/React Native
Telecom Infrastructure
MVNO / MVNE Development
End-to-end MVNO platform development: BSS/OSS, HLR/HSS, SMSC, EPC/IMS VoLTE, SIM provisioning, billing engine, and self-care portal.
MVNO Software Development
Full platform: BSS, OSS, HLR, SMSC, SIM OTA, VoLTE
MVNO BSS/OSS Architecture
Billing, mediation, HSS, EPC, IMS — deep technical guide
Class 5 Softswitch Development
Carrier-grade softswitch with routing and billing
Dedicated Teams
Hire Specialist Developers
Staff augmentation and dedicated developer hiring. Vetted engineers onboard within 5 business days.
Verticals
Industries We Serve
Domain-specific communication software built for compliance, scale, and the unique workflows of each sector.
Telecom
Carrier platforms, MVNO/MVNE, softswitches, billing
Learn moreHealthcare
HIPAA-compliant VoIP, telemedicine, secure messaging
Learn moreFintech
Secure voice channels, compliance recording, IVR
Learn moreReal Estate
Click-to-call, virtual tours, lead routing dialers
Learn moreEducation
Virtual classrooms, WebRTC tutoring, LMS integration
Learn moreCall Centres
ACD, predictive dialling, QA recording, analytics
Learn moreSaaS Startups
CPaaS, communication APIs, multi-tenant PBX
Learn moreWhy CelloIP
What Sets Us Apart
We are a specialist telecom software team — not a generic IT services company taking on any project.
VoIP-First Expertise
Every engineer at CelloIP has hands-on production experience with Asterisk, FreeSWITCH, or OpenSIPS — no generalists.
End-to-End Ownership
We design, build, deploy, and support. One team owns the full lifecycle — no handoffs, no silos.
Fixed-Price Milestones
Every engagement starts with a scoped proposal and fixed milestone pricing. No surprise invoices.
IP Stays Yours
Full source code delivery, no licence lock-in. You own everything we build.
Remote-First, Global
Distributed team across India and Europe. IST + CET timezone coverage for async collaboration.
GDPR & HIPAA Aware
Data privacy built in from architecture. Secure deployments for healthcare, fintech, and regulated sectors.
Resources
Helpful Guides & Tools
Ready to Build Your Next Telecom Platform?
Share your requirements and get a free technical consultation with Kaushik Parmar, our Founder & VoIP Architect — within 24 hours.