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Asterisk Development & Consulting

Asterisk Development Services for reliable, scalable VoIP platforms

Developers with carrier-grade Asterisk experience since 2010. We provide Asterisk Development Services to build telephony platforms, migrate legacy PBX and older Asterisk to the latest Asterisk LTS with PJSIP, and support existing systems.

Building something new
Already running Asterisk

Latest Asterisk LTS

PJSIP

ARI · AGI · AMI

    Talk to an Asterisk engineer


    Not a sales script. A technical reply within one business day.

    ★★★★★ “Resolved our core PJSIP routing within 48 hours.”
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    You own 100% of the
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    Asterisk · FreeSWITCH · OpenSIPS

    Trusted by Global Clients

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    AstriCon

    SCALE 23x
    Industry authority

    Selected to speak at AstriCon (SCALE 23x)

    Samir Doshi, CTO and Co-Founder, on the 2026 AstriCon program with “Scaling Telephony Systems: Lessons from 100 to 10,000 Calls.” View the talk listing →

    Start where you are

    Two Ways Teams Work With Us

    Planning a new platform or maintaining an existing one? Choose the path that fits your needs. 

    PATH A · BUILD

    Build a new Asterisk platform

    Build a production-ready Asterisk platform with the right Asterisk Architecture, features, integrations, and documentation from day one.

    • Custom IP PBX and multi-tenant systems
    • Contact center and IVR development
    • Softswitch, calling card, and broadcasting solutions
    • AGI scripting and dialplan architecture
    Scope my build
    PATH B · OPTIMIZE

    Already running Asterisk?

    Inherited a system, dealing with an outdated version, or lacking in-house expertise? We help stabilize, upgrade, and support your existing platform.

    • Migration from legacy PBX and older Asterisk versions to the latest LTS
    • Security hardening and performance tuning
    • Dialplan rescue and documentation
    • Tiered L1 / L2 / L3 support on retainer or per incident
    Get a system review
    The real cost of a shaky platform

    Running Asterisk Shouldn't Feel Like a Risk

    Your customers don’t care how many features you have when the system isn’t reliable. 

    Calls drop under load

    Calls drop under load

    The platform performs well under normal traffic but struggles when traffic spikes.

    Stuck on an old version

    An outdated Asterisk build that’s hard to upgrade, limiting new features and creating security gaps.

    Undocumented dialplan

    The contractor left, but the system stayed. Now every change comes with risk.

    No failover

    No failover

    A single server means a single outage can take down your entire communication system.

    Security you can't audit

    Security you can't audit

    Open-source flexibility is powerful, but hidden backdoors can become a serious security risk.

    No in-house expertise

    No in-house expertise

    When something breaks during a critical window, your team is left without anyone who truly understands the stack.

    What changes with the right partner: a stable, documented, upgradeable platform, real failover, hardened security, and a team that hands back clean code and knowledge, not lock-in.

    Talk to an engineer
    What we do

    Our Asterisk Services

    World-class development, customization, and support designed around your business outcomes, not individual features. 

    Asterisk Custom Development

    Our experienced developers build reliable unified communication solutions powered by Asterisk.

    Asterisk Consultancy

    Expert Asterisk developers to help you build, scale, customize, or enhance your existing platform.

    Asterisk AGI Development

    Custom AGI development for first-party call control and administration of your Asterisk system.

    Dialplan Programming

    Take control of call flow and routing with context-aware dialplan scripts built by Asterisk specialists.

    Support & Maintenance

    We handle technical issues and bug fixes, keeping your Asterisk platform stable, secure, and up to date.

    High Availability & Clustering

    Reliable cluster architecture and failover for high availability and uninterrupted operations.

    Depth, not buzzwords

    The level of Asterisk work you should demand from any partner

    If a vendor can’t talk about these specifics, they’re guessing. Here’s the ground we operate on every day.

    Ask us a hard question

    PJSIP migration

    Moving from chan_sip to PJSIP cleanly, without breaking existing trunks.

    ARI · AGI · AMI

    Deep integrations and real-time call control across the Asterisk interfaces.

    SIP trunk & carrier integration

    Reliable interconnects, least-cost routing, and clean carrier onboarding.

    Context-aware dialplans

    Routing that branches on CRM data, time, and agent skill, with fallback and overflow paths.

    HA & clustering

    Active failover architecture so a single node is never a single point of failure.

    CDR & billing accuracy

    Rating and records you can trust, so no revenue leaks between the call and the invoice.

    How we keep you online

    High-availability Asterisk Architecture

    An active-active design with automatic failover, so no single node can take your platform down.

    sip-load-balancing-asterisk-diagram-1
    What you get

    Outcomes, Not Just Features

    The goal is simple: deliver results that matter to your business. 

    Less downtime

    Clearer, reliable calls

    Scales with traffic

    No vendor lock-in

    Hardened security

    Faster time to market

    Lower maintenance cost

    Full platform control

    For teams already on Asterisk

    Migration, Upgrades, Optimization & Support

    Keep the system you have and make it more reliable. We take ownership of the technical areas your team shouldn’t have to manage. 

    Migration

    Asterisk migration

    Migrate legacy PBX or older Asterisk to the latest LTS with PJSIP while keeping your existing system live.

    Upgrade

    Asterisk upgrade

    Keep your platform up to date with clean version upgrades and security patches, while minimizing production disruption.

    Optimize

    Asterisk optimization

    Get better performance, lower costs, and improved quality through dialplan re-engineering and system optimization.

    Support

    Support & maintenance

    24/7 monitoring, first-line response, and preventive maintenance to detect issues before they impact your system.

    Get the Asterisk support you need, your way: fixed-scope project, monthly retainer, or a dedicated developer on your team. 

    Get a system review
    Built on Asterisk

    Solutions We Deliver

    Proven Asterisk Solutions we develop, customize, integrate, and support for communication businesses. 

    Live Call Monitoring

    Real-time monitoring of ongoing, ringing, and conference calls from a purpose-built dashboard.

    Broadcasting Solution

    Enable collaboration and new revenue opportunities with retail VoIP broadcasting services.

    Calling Card Solution

    Build and scale a prepaid or postpaid calling-card business with powerful VoIP software.

    VoIP PBX Solution

    Single-tenant or multi-tenant PBX solutions designed to improve communication and create new revenue opportunities.

    IVR Solution

    Automatically answer and route calls while letting callers self-serve with an interactive voice response system.

    Call Center Solution

    Manage inbound, outbound, and blended campaigns to improve efficiency, reduce costs, and increase revenue per agent.

    Don’t see your solution? We design and build custom Asterisk solutions to your exact requirements.

    Discuss a custom build
    Why Inextrix

    A Partner Not Just a Vendor

    Get better results from an Asterisk Development Company that takes ownership of your platform from day one. 

    Technical ownership

    We own the outcome and give you clean, documented code your team can manage without relying on one person.

    • Documented handover
    • Knowledge transfer
    • No unnecessary dependency

    Transparent, faster execution

    Fast, reliable delivery backed by clear communication and a proven process.

    • Transparent communication
    • Faster execution
    • Aligned to your goals

    Long-term support

    Ongoing monitoring, updates, and improvements to keep your platform reliable as it grows.

    • 24/7 support
    • Preventive maintenance
    • Long-term partnership

    Our Case Studies

    Explore our ‘Client Success Stories’ to see how we turn real challenges into successful outcomes. 

    Secure IP PBX Solution
    North America
    Secure IP PBX Solution
    How Inextrix’s Secure IP PBX Ensured Confidentiality for a U.S. Healthcare Provider

    We are glad to support a leading U.S. healthcare provider in strengthening its communication security and compliance framework. The organization needed a reliable partner to improve confidentiality across patient interactions. With our expertise in secure IP PBX development, we delivered a customized, compliance-ready solution that improved data protection, ensured secure communication flows, and aligned seamlessly with their operational and regulatory requirements.

    Industry · Healthcare
    Download case study →
    IP PBX
    Asia
    IP PBX
    A Turnkey Communication Solution Provisioned With On-Site Deployment & Training​

    A tailored communication solution is deployed with on-site setup and training services for MKC Infrastructure Ltd, which is one of the renowned construction and infrastructure development companies in India. The system consists of an IP PBX solution, desktop and mobile dialer support, and IP phones.

    Industry · Construction & Infrastructure
    Download case study →
    See all case studies

      60-SECOND SELF-ASSESSMENT

      Is your Asterisk setup carrier-ready?

      Answer four quick questions. We'll flag your risk areas instantly, no call required.

      Do you have automatic failover if a node goes down?

      Is your Asterisk on a current, supported LTS version?

      Is your dialplan documented and understood by more than one person?

      Have you had a security review in the last 12 months?

      Frequently Asked Questions

      What is Asterisk? And what is Asterisk development?

      Asterisk is a pioneering open-source platform that turns an ordinary server into an engine for business communication. Asterisk development is the process of turning that platform into a production-ready system through custom development, integrations, configuration, and feature development. 

      Our Asterisk Development Services cover development, customization, integration, migration, deployment, and support. This includes IVR design, softswitch and SBC development, conferencing, IP PBX, AGI scripting, dialplan programming, Asterisk API Integration, and failover recovery. We also support Asterisk-based stacks such as FreePBX and VICIdial. 

      Yes. Our Asterisk Customization Services help you add features, integrate CRM and business tools, improve routing, strengthen security, and optimize performance with minimal disruption to your live service. 

      Yes. Our Asterisk Migration Services cover legacy PBX systems and older Asterisk builds. We migrate to the latest Asterisk LTS with PJSIP, including SIP trunk reconfiguration, data migration, and a parallel cutover strategy that keeps you running during the switch. 

      Yes. Work we build for you is yours. We hand over clean, documented code and knowledge transfer so your team is never locked into us or dependent on a single engineer. 

      We close known vulnerabilities, harden configurations, encrypt media with SRTP/TLS, implement STIR/SHAKEN caller-ID authentication, and design high-availability Asterisk Architecture with real failover. Ongoing support covers monitoring, security updates, and preventive maintenance. 

      We offer flexible engagement models based on your needs: fixed-scope projects, monthly retainers, or a dedicated Asterisk developer embedded with your team. You can engage us for Asterisk Consulting Services, Custom Asterisk Development, integration, migration, or ongoing Asterisk Maintenance and Support. 

      Over 16 years of dedicated Asterisk work, a team of experienced Asterisk developers, and a track record of both new builds and rescues of existing systems. As an Asterisk Development Company, we deliver end-to-end Asterisk Development Services including consulting, development, customization, integration, migration, deployment, and support. 

      Note: Asterisk is a Registered Trademark of Sangoma Technologies.

      Ready to Get Started?

      With decades of experience and know-how in software development essentials, we build future-proof, intuitive, and highly scalable web, mobile, and VoIP solutions. Bring ultimate success to your business with Next-Gen, Tech-Empowered Solutions.

      Sales

      +1 315 898 1139 (United States)

      +91 93166 18150 (India)

      +44 20 3769 2439 (United Kingdom)

      contact@inextrix.com

      HR

      +91 7624079397 (India)

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        United States

        425 W Colonial Dr, Suite 303
        Orlando, FL 32804
        United States

        +1 315 898 1139

        United Kingdom

        128 City Road
        London EC1V 2NX
        United Kingdom

        +44 20 3769 2439

        South Africa

        Baobab Office Park, 86 John Vorster Rd, Randpark Ridge 2169
        South Africa

        +27 10 630 0487

        India

        508–509, Lilamani Corporate Heights
        Ahmedabad, Gujarat 380013
        India

        +91 93166 18150

        Established in 2010, we're a team of tech enthusiasts driving businesses to success with cutting-edge technology.

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