We Build VoIP Products That Scale
From cloud contact centers to wholesale VoIP platforms, we design, develop, and deploy production-grade VoIP SaaS products built on FreeSWITCH, Asterisk, WebRTC, and OpenSIPS.
VoIP Products We Develop
Every type of VoIP SaaS product, from MVP to enterprise-grade platform. Built for scale, security, and revenue from day one.
Cloud Contact Center
Multi-tenant, omni-channel contact center platforms with predictive dialer, IVR builder, WebRTC agent desktop, real-time analytics, and campaign management.
IP PBX & Unified Communications
Enterprise-grade PBX systems with auto-attendant, call parking, conferencing, voicemail-to-email, presence management, and mobile extensions.
Wholesale & Retail VoIP Platform
Complete carrier-grade switching and billing platforms for wholesale carriers and retail VoIP providers with LCR routing, CDR processing, and payment integration.
CPaaS & Communication APIs
Build your own Twilio-like platform. Programmable voice, SMS, video, and messaging APIs with SDKs, webhooks, and developer-friendly documentation.
Video Conferencing Platform
Scalable video meeting solutions with screen sharing, recording, virtual backgrounds, breakout rooms, and up to 500+ participants per session.
SIP Trunking Platform
Multi-tenant SIP trunking as a service with DID management, number porting, E911, failover routing, and a self-service customer portal.
AI-Powered Voice Bots
Intelligent IVR and voice bot platforms with natural language understanding, speech recognition, sentiment analysis, and seamless agent handoff.
VoIP Billing & OSS/BSS
End-to-end billing and operations support systems for telecom. Rating engines, invoice generation, payment gateways, tax management, and partner settlement.
VoIP Solutions for Every Industry
We understand the compliance, scalability, and user experience demands unique to each industry.
Telecom & ISPs
Carrier-grade platforms for service providers
BPO & Call Centers
Multi-tenant contact center solutions
Healthcare
HIPAA-compliant communication systems
Financial Services
Secure, compliant voice infrastructure
Education
Virtual classroom and conferencing tools
E-Commerce
Click-to-call and customer engagement
Built on Proven Technologies
We use battle-tested open-source telecom technologies combined with modern development frameworks.
Core Switching
4 technologies
SIP & Proxy
4 technologies
Real-Time
4 technologies
Backend
4 technologies
Frontend
4 technologies
Infrastructure
4 technologies
How We Build Your Product
A proven 6-phase development process that takes your idea from concept to a production-ready VoIP SaaS platform.
Discovery & Requirements
1-2 WeeksWe deep-dive into your business model, target market, user personas, and technical requirements to define the exact product scope and architecture.
Product Design & Prototyping
2-3 WeeksOur UI/UX team creates wireframes, interactive prototypes, and a complete design system. You review and approve before a single line of code is written.
Agile Development
8-16 WeeksWe build your product in 2-week sprints with continuous demos. FreeSWITCH/Asterisk core, WebRTC frontend, APIs, dashboards, and billing are developed in parallel.
QA & Security Testing
2-3 WeeksRigorous load testing with thousands of concurrent calls, security audits, penetration testing, SIP fuzzing, and compliance validation.
Deployment & Launch
1-2 WeeksWe deploy to your cloud or on-premise infrastructure with HA clustering, monitoring, alerting, and a full runbook for your operations team.
Post-Launch Support
OngoingOngoing maintenance, performance optimization, feature enhancements, and 24/7 critical issue support. Your product keeps evolving after launch.
Choose How We Work Together
Flexible engagement models to match your project stage, budget, and timeline.
Fixed-Price Project
Defined Scope & Budget
Best for well-defined products with clear requirements. Fixed timeline, fixed budget, and guaranteed deliverables.
- Detailed SOW upfront
- Fixed cost & timeline
- Milestone-based payments
- Guaranteed deliverables
- Change request process
- Full source code ownership
Dedicated Team
Your Extended R&D
A full VoIP development team working exclusively on your product. Ideal for long-term product development and continuous iteration.
- Custom team composition
- Monthly billing
- Full project transparency
- Daily standups & sprints
- Scale up/down as needed
- Works in your timezone
MVP Development
Launch in 8-12 Weeks
Get your VoIP product to market fast. We build a feature-complete MVP, validate with real users, then iterate based on data.
- Core features only
- 8-12 week delivery
- Production-ready quality
- User feedback loop
- Post-MVP roadmap
- Scale-ready architecture
Why Build With AnrizVoIP?
We are not a generic software agency. We are a VoIP product company that builds VoIP products for others using the same team that builds our own.
We Build Our Own Product
AnrizVoIP is our own multi-tenant contact center platform serving 12 countries. We do not just consult, we ship production VoIP products.
Full-Stack VoIP Expertise
From SIP trunking and FreeSWITCH core to React dashboards and mobile apps. One team handles everything. No fragmented vendors.
Built for Scale
Every product we build is architected for high concurrency from day one. OpenSIPS load balancing, clustering, and auto-scaling are baked in.
Security First
TLS/SRTP encryption, SIP authentication, rate limiting, fraud detection, and compliance-ready architecture are standard in every build.
Faster Time to Market
Our pre-built VoIP component library accelerates development by 40%. Reusable modules for billing, WebRTC, IVR, and reporting save months of work.
End-to-End Ownership
You own 100% of the source code, IP, and infrastructure. We sign comprehensive IP transfer agreements. No vendor lock-in, ever.
Frequently Asked Questions
Common questions about VoIP product development with AnrizVoIP.
We build the full spectrum of VoIP SaaS products: cloud contact centers, IP PBX systems, wholesale/retail VoIP platforms, CPaaS (communication APIs), SIP trunking platforms, video conferencing solutions, AI voice bots, and VoIP billing/OSS/BSS systems. If it involves real-time voice, video, or messaging over IP, we can build it.
Our core stack includes FreeSWITCH and Asterisk for call processing, OpenSIPS/Kamailio for SIP proxy and load balancing, WebRTC with SIP.js for browser-based calling, React/Next.js for frontend dashboards, Node.js/Python/Go for backend services, and PostgreSQL/Redis for data. We deploy on Docker/Kubernetes across AWS, GCP, or on-premise infrastructure.
An MVP typically takes 8-12 weeks. A full-featured product with billing, multi-tenancy, analytics, and integrations takes 16-24 weeks. Complex enterprise platforms may take 6-9 months. We provide detailed timelines during the discovery phase based on your specific requirements.
Yes, multi-tenancy is one of our core competencies. Our AnrizVoIP platform is itself multi-tenant. We implement complete data isolation, per-tenant configuration, role-based access, tenant-level billing, and white-label capabilities with custom branding per tenant.
Our architecture supports thousands of concurrent calls out of the box using OpenSIPS/Kamailio for SIP load balancing and FreeSWITCH clustering. For higher capacity, we implement custom cluster setups with horizontal scaling to meet your growing demand.
Yes, 100%. All source code, documentation, architecture designs, and intellectual property created during the project belong entirely to you. We sign comprehensive IP assignment agreements before development begins. There is no vendor lock-in.
Yes. We offer ongoing support packages that include 24/7 critical issue response, performance monitoring and optimization, security patches, feature enhancements, and version upgrades. Most clients continue with us for long-term product evolution.
Absolutely. We build products with API-first architecture and integrate with CRM systems (Salesforce, HubSpot, Zoho), helpdesk tools (Zendesk, Freshdesk), payment gateways (Stripe, PayPal), SIP trunk providers (Twilio, Telnyx, Vonage), and any system with an API.
Costs vary based on complexity. An MVP starts from $15,000-$30,000. A full-featured multi-tenant platform ranges from $50,000-$150,000. Enterprise-grade products with advanced features can go higher. We provide transparent, detailed estimates after the discovery phase.
Yes. We regularly take over, optimize, and scale existing VoIP products. This includes codebase audits, performance bottleneck resolution, architecture redesign for scalability, migrating to containerized deployments, and adding new features to existing platforms.
Ready to Build Your VoIP Product?
Share your idea. We will turn it into a scalable, revenue-generating VoIP SaaS platform.