Voice is one of the most valuable services an MSP can offer. Once a customer’s phones run on your platform, switching becomes difficult. However, many hosted PBX software for MSPs solutions are still designed like single-business phone systems rather than platforms built for providers managing multiple clients.
This creates challenges for MSPs, including lost margins, limited control, and operational complexity.
The opportunity is growing. According to a research, the global hosted PBX market was valued at USD 11.20 billion in 2023 and is expected to reach USD 31.07 billion by 2030, growing at a 16.7% CAGR. Also, the managed services market reached USD 401.2 billion in 2025 and is projected to grow to USD 847.4 billion by 2033. These trends show that voice services are becoming an important part of the MSP business model.
Despite this growth, many providers have not added unified communications services. This leaves significant room for growth.
The challenge is choosing the right platform. Not every hosted PBX software for MSPs is built for a provider model. This guide compares the best hosted PBX platforms for resellers, highlights hosted PBX software comparison factors, and explains which solutions support hosted PBX for telecom resellers while allowing providers to brand, bill, and control their own services.
What Makes a Hosted PBX Right for an MSP
A business phone system and hosted PBX software for MSPs are designed for different needs. MSPs need a platform that supports multiple customers, simplifies management, and protects profit margins.
Here are the key features to look for:
- True multi-tenancy: Manage multiple customer tenants from a single console without deploying a separate server for each client.
- Operator-branded control: Customize the platform with your own logo, domain, and customer portal so clients see your brand, not the vendor’s.
- Bring Your Own Carrier (BYOC): Keep your existing SIP trunks, phone numbers, and carrier rates while using the platform as the software layer.
- Per-tenant provisioning and billing: Quickly add, suspend, or scale customers with billing plans that match your business model.
- Margin-friendly licensing: Pricing based on sessions or tenants is often more cost-effective than per-seat licensing, which can reduce margins as customers grow.
A hosted PBX software for MSPs should deliver all these capabilities. If it lacks BYOC, true multi-tenancy, or flexible licensing, it may be better suited for end-user businesses than managed service providers.
How to Setup a Multi-Tenant Contact Center?
The Top 10 Hosted PBX Software for MSPs in 2026
1. iCallify: The Operator-First Pick (Call Center and IP PBX)
iCallify is a multi-tenant contact center and IP PBX software built specifically for telecom operators, MSPs, and service providers. Every tenant can be fully white-labeled, allowing customers to access the platform under your brand. With Bring Your Own Carrier (BYOC) support, you can continue using your existing SIP trunks, phone numbers, and carrier relationships while maintaining full control over pricing and margins.
Key features include:
- True multi-tenant architecture with a dedicated operator dashboard for managing multiple customers.
- Fully white-label portals, mobile apps, and custom domains.
- BYOC support for existing SIP trunks and phone numbers.
- A single platform that supports both Call Center and IP PBX deployments.
- Built for telecom operators, MSPs, and resellers, rather than end-user SMBs.
Best for: Telecom operators, MSPs, and hosted PBX providers looking for a branded, multi-tenant platform with complete control over their carrier, customers, and revenue.
2. NetSapiens (A Crexendo Company)
NetSapiens is a hosted PBX platform designed for service providers and powers more than 7 million users worldwide. Its key advantage is session-based licensing instead of per-seat pricing, helping providers maintain better margins as customer usage grows. The platform includes native multi-tenancy and flexible APIs for managing reseller environments.
Key features include:
- Concurrent session-based licensing, making it cost-effective for high-usage customers.
- Native multi-tenant architecture with extensive API support.
- Carrier-agnostic design with Bring Your Own Carrier (BYOC) compatibility.
- Flexible tools for building and managing reseller and service provider environments.
Best for: Established telecom providers and MSPs with in-house technical expertise looking for a scalable, carrier-agnostic hosted PBX platform.
3. 2600Hz / Kazoo (An Ooma Company)
Kazoo is an open-core hosted PBX and UCaaS platform designed for service providers. With more than 300 APIs, it offers extensive customization for providers that want to build and brand their own communications platform.
Key features:
- 300+ open APIs for custom development and integrations.
- Fully white-label reseller platform.
- Carrier-agnostic with SIP-based architecture and BYOC support.
- Highly customizable for providers with technical teams.
Best for: Telecom providers and MSPs that need deep customization and complete control over branding and service delivery.
4. SkySwitch (A BCM One Company)
SkySwitch is a hosted PBX and UCaaS platform built for MSPs and telecom resellers. It combines voice, messaging, and contact center capabilities while allowing partners to set their own pricing and maintain customer relationships.
Key features:
- White-label UCaaS and contact center platform.
- Partners control pricing and customer relationships.
- Strong onboarding and partner enablement.
- Integrates with third-party billing platforms such as Rev.io.
Best for: Small and mid-sized MSPs looking for a ready-to-sell hosted PBX solution.
5. Thirdlane
Thirdlane is a multi-tenant PBX and UCaaS platform built on Asterisk and Kamailio. It offers both self-hosted and cloud-hosted deployment options, giving providers flexibility over infrastructure.
Key features:
- Native multi-tenant architecture with isolated customer environments.
- Available as self-hosted or vendor-hosted.
- Supports per-seat and per-concurrent-call licensing.
- APIs for tenant provisioning, suspension, and migration.
Best for: Service providers with technical expertise that want deployment flexibility and full platform control.
6. Yeastar
Yeastar offers hosted PBX software for MSPs and ITSPs with built-in multi-tenancy, branding, and Bring Your Own Carrier (BYOC) support. The platform can be deployed on Yeastar Cloud or public cloud providers such as AWS and Microsoft Azure.
Key features:
- Manage branding, pricing, and customers from one console.
- Native BYOC support with certified SIP trunk providers.
- Cloud and self-managed deployment options.
- Per-tenant phone number management.
Best for: MSPs and ITSPs looking for a flexible hosted PBX platform with straightforward deployment.
7. HoduSoft (HoduPBX)
HoduPBX is a multi-tenant IP PBX built for ITSPs, ISPs, and telecom providers. It supports reseller management, integrated billing, and large-scale deployments.
Key features:
- Supports unlimited tenants, extensions, and concurrent calls (vendor reported).
- Built-in reseller management and billing.
- White-label applications for Android, iOS, and Chrome.
- Supports prepaid and postpaid billing.
Best for: Telecom providers that need integrated reseller management and billing capabilities.
Launch voice on your own carrier
See how operators deliver a branded, multi-tenant voice service using their existing SIP trunks.
8. 3CX
3CX is one of the world’s most widely used software PBX platforms. Its multi-tenant edition allows partners to host multiple customers under a single license while selling exclusively through channel partners.
Key features:
- One license can support multiple customer tenants.
- Channel-only sales model that avoids competing with partners.
- Carrier-agnostic deployment with flexible hosting.
- Suitable for hosting multiple smaller customer environments.
Best for: MSPs and resellers serving small and medium-sized businesses.
9. RingLogix
RingLogix developed RingOS specifically for MSPs that want to build and sell branded UCaaS services. The platform combines service management and billing in one interface.
Key features:
- Integrated quote-to-cash workflow and billing.
- White-label UCaaS platform.
- Single management console for service providers.
- Flexible carrier integrations.
Best for: MSPs looking for an all-in-one platform to manage and bill UCaaS services.
10. RingCentral
RingCentral is a leading cloud communications provider with a large reseller and partner ecosystem. While it offers enterprise-grade UCaaS, it primarily delivers services under its own carrier network and brand.
Key features:
- Enterprise-grade voice, messaging, and video platform.
- Large global partner program.
- Reliable infrastructure and extensive collaboration features.
- Vendor-managed carrier services.
Best for: Partners that prefer a referral or agent model rather than operating their own branded telecom platform.
How to Choose the Right Platform
Choosing the right hosted PBX software for MSPs starts with your business model, not just the feature list.
Consider these key factors:
- Who owns the customer? If you want to manage the customer relationship and billing, choose a platform that lets you own both.
- Bring Your Own Carrier (BYOC): If you already have carrier agreements, make sure the platform supports BYOC so you can keep your existing SIP trunks, phone numbers, and margins.
- Pricing model: Session-based or tenant-based licensing is often more profitable than per-seat pricing, especially as customers grow.
- White-label capabilities: Look beyond a custom logo. The platform should support fully branded portals, domains, and applications.
- Deployment speed: A platform that can be deployed in weeks helps you launch services faster and start generating recurring revenue sooner.
Conclusion:
Voice remains one of the most valuable recurring services an MSP can offer. The right hosted PBX software for MSPs helps you build a profitable voice business by giving you full control over your brand, customer relationships, billing, and carrier connections. The wrong platform can limit your flexibility and reduce your margins.
When evaluating providers, prioritize multi-tenancy, white-label branding, BYOC, and a licensing model that supports long-term growth. For MSPs and telecom providers that want complete control of their voice services, an operator-first platform provides the strongest foundation for scaling.
Author
