Quick answer: A hosted PBX is a cloud-managed business phone system that handles calling, routing, messaging, voicemail, and administration without an on-site PBX server. Buyers should compare call features, reliability, security, integrations, support, billing, and total cost. For MSPs and telecom resellers, the best hosted PBX provider also protects brand ownership, margins, and the customer relationship.
What Is Hosted PBX?
Hosted PBX is a business phone system operated in a provider's cloud instead of on equipment at the customer's office. PBX means private branch exchange, the call-control system that manages extensions, transfers, voicemail, call routing, and the other functions a business phone system depends on.
A hosted PBX platform uses Voice over Internet Protocol, or VoIP, to carry calls over a broadband connection. The FCC tracks interconnected VoIP as its own category of voice service: a service that supports two-way voice communication, requires broadband, uses IP-compatible equipment, and connects with the public switched telephone network.
The model is mainstream, not experimental. The FCC's most recent Voice Telephone Services report, covering the three-year period through June 2025, counted roughly 473 million retail voice telephone connections in the United States. Wireline technologies, the category that includes interconnected VoIP, now account for under 17 percent of that total as mobile keeps taking share, but that shift is a story about consumer phone habits, not about how businesses buy phone systems.
For an MSP or reseller, hosted PBX is more than a phone system. It is a recurring service that shapes installation time, support workload, billing accuracy, customer retention, and margin.
Hosted PBX Features to Compare
A long feature list does not automatically indicate a better platform. The right question is whether the features work together in the workflows your team and your customers actually use.
Core calling features
Every serious hosted PBX platform should include:
- Business numbers and extensions
- Auto attendant and interactive voice response
- Call forwarding and simultaneous ringing
- Call transfer, hold, park, and pickup
- Voicemail-to-email and visual voicemail
- Caller ID and call blocking
- Call queues and hunt groups
- Business hours and holiday schedules
- Call recording and call reporting
- Desktop and mobile softphones
- Desk phone support
- Number porting and new number ordering
Auto attendant is the menu that directs callers to the right department or person. Hunt groups distribute calls among a defined group of users, while call queues place callers in line until an available employee answers. These features matter because customers rarely buy a phone system for one employee making one call at a time. They buy a system that keeps calls moving when staff are busy, remote, unavailable, or spread across multiple locations.
Unified communications
Many hosted PBX systems now include unified communications, commonly called UCaaS. UCaaS combines voice with messaging, video meetings, presence, file sharing, and collaboration tools in one service. Important UCaaS capabilities include:
- Business SMS and MMS
- Team messaging
- Video meetings and screen sharing
- Presence indicators
- Shared contacts and directories
- Microsoft Teams integration
- Google Workspace and Microsoft 365 integrations
- CRM integrations
- Application programming interfaces for custom workflows
The value depends on adoption. A platform with every collaboration feature is not useful if users still move between three separate applications to answer calls, send texts, check availability, and update customer records.
Administration and reporting
Hosted PBX administration should be simple enough for an MSP or internal IT team to manage without opening a support ticket for every change. Look for:
- Multi-tenant administration
- Role-based permissions
- Bulk user creation and template-based deployments
- Number and extension management
- Call-flow editing
- Device management
- Usage and call quality reporting
- Audit logs
- Customer-level portals
- API access
Multi-tenant administration is especially important for service providers. The system should let a partner manage many customer accounts from one interface while keeping each customer's users, data, billing, and permissions separate.
Reliability and security
Ask how the provider handles redundancy, failover, network monitoring, software updates, data protection, and service incidents. A hosted PBX provider should be able to explain its availability commitments in plain language. Security questions should cover:
- Encryption for signaling and media
- Single sign-on and multi-factor authentication
- Administrative access controls
- Call recording storage and data retention policies
- Compliance documentation
- Incident response
- Fraud monitoring
- Spam and robocall mitigation
Do not stop at a provider's uptime number. Ask what happens during an outage, how quickly support escalates a problem, and whether calls can fail over to mobile numbers or another location.
Emergency calling
Emergency calling deserves its own review. Under FCC rules implementing Kari's Law and RAY BAUM'S Act, applicable multi-line telephone systems must support direct 911 dialing and on-site notification, and dispatchable location information must be handled for relevant emergency calls. A buyer should verify:
- How emergency locations are created and updated
- Whether locations can be assigned by user, device, or extension
- How nomadic users update their location
- Whether dispatchable location information reaches the emergency call center
- How on-site notifications are delivered
- Whether emergency calling works during an internet outage
- Who owns the compliance workflow
A hosted PBX provider should make emergency-location management clear. If the answer requires a long technical explanation but no documented process, keep evaluating.
Do not score hosted PBX platforms on feature count alone. Weigh multi-tenant administration, documented emergency-calling workflows, and real failover behavior, because those three areas drive most of your support load and your compliance exposure once you are managing a book of customers.
How Much Does Hosted PBX Cost?
Hosted PBX pricing usually combines a recurring license with usage, numbers, devices, services, taxes, and regulatory fees. A per-user price is only the starting point.
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| Cost category | What it may include | What to verify |
|---|---|---|
| User or seat licenses | Phone access, softphone, voicemail, basic features | Minimum seats, inactive users, annual terms |
| Phone numbers | Local, toll-free, international, vanity numbers | Number fees, porting charges, inventory limits |
| Calling | Unlimited domestic calling or metered minutes | Fair-use terms, international rates, toll-free usage |
| Messaging | Business SMS and MMS | Registration, campaign fees, message limits |
| Advanced features | Recording, analytics, contact center, AI Voice Agents | Add-on pricing and usage charges |
| Hardware | Desk phones, headsets, conference devices | Purchase, rental, replacement, configuration |
| Implementation | Design, porting, training, programming | One-time fees and included services |
| Support | Standard, premium, managed, or partner support | Response times, escalation paths, after-hours coverage |
| Taxes and regulatory fees | E911, telecom taxes, recovery charges, surcharges | Jurisdictional calculation and invoice transparency |
Published prices give a useful benchmark. Zoom's published Phone plans run 10 dollars per user per month for metered calling, 15 dollars for unlimited US and Canada calling, and 20 dollars for its Global Select plan covering 40-plus countries. RingCentral's published RingEX plans run from 20 dollars for Core to 25 dollars for Advanced and 35 dollars for Ultra per user per month on annual billing, with a quote-based Customer Engagement Bundle above them and features such as automatic call recording, advanced routing, and larger toll-free and SMS allotments gated to the higher tiers.
Those prices are not directly comparable. The plans differ in calling scope, video, messaging, recordings, integrations, support, and contract terms. Taxes, regulatory charges, hardware, implementation, and add-ons can also change the final invoice.
The seat price is marketing. Margin lives in the line items underneath it: numbers, usage, taxes, hardware, and support. A platform that automates usage rating and telecom tax through a system like ViiBE protects the spread that fragmented quoting and manual billing quietly erode.
Hosted PBX Providers to Consider
The best hosted PBX provider depends on who owns the customer relationship and who is responsible for the operational work.
One difference is easy to miss in a feature-by-feature comparison: who actually helps design and install the system. Viirtue partners are backed by a nationwide network of more than 500 certified MSPs and telecom resellers who can scope the call flow, manage number porting, train the customer's staff, and stay on for ongoing support. Zoom Phone, RingCentral, and Nextiva are built for direct, self-service purchase: a customer picks a plan, gets shipped hardware, and configures most of the rest alone. For a buyer who wants hands-on deployment help rather than a login and a box of phones, that difference in support model often matters more than any single line item on a spec sheet.
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| Provider | Best fit | Strengths | Main consideration |
|---|---|---|---|
| Viirtue | MSPs, IT providers, telecom resellers, and agents | White-label hosted PBX, ViiBE quoting and billing, partner branding, SIP trunking, AI Voice Agents, and a 500-plus partner network certified to design and implement the system | Partner economics and responsibilities should be modeled around the chosen program |
| Zoom Phone | Businesses already invested in Zoom | Competitive published pricing, calling, meetings, mobile access, and bring-your-own-carrier options | Deployment is largely self-service; design and implementation support are not part of a direct purchase |
| RingCentral | Businesses seeking a mature direct UCaaS platform | Voice, messaging, video, call management, integrations, and multi-site administration | Public pricing and onboarding are built for self-service; a certified partner network is not part of the standard purchase |
| Nextiva | Businesses wanting packaged voice and customer experience tools | Tiered plans, business phone service, messaging, routing, reporting, and customer experience features | Confirm which features require add-ons, annual terms, or a sales quote; deployment is typically self-managed |
Viirtue
Viirtue is built around the channel rather than around direct end-customer sales. Its white-label partner program gives partners control over branding, packaging, deployment, support, and billing, while Viirtue provides the underlying platform, onboarding, training, and escalation support.
The operational difference is significant. A reseller can present the hosted PBX under its own brand, set its own pricing, and keep the customer relationship instead of sending the customer to a separate provider portal. Rather than shipping a box of phones and a login, Viirtue's network of more than 500 certified partners nationwide can design the call flow, handle the port, and implement the system on site, work that direct competitors leave entirely to the customer.
ViiBE adds quoting, billing, tax handling, and payment workflows to the voice platform. That matters because billing errors are rarely caused by the phone system alone. They usually appear when quoting, provisioning, usage rating, taxes, and invoicing live in separate systems.
Viirtue also offers AI Voice Agents that deploy inside the same voice environment. Partners can use them for after-hours coverage, overflow handling, lead qualification, call summaries, and routing without forcing customers to buy a separate AI point tool. Viirtue is the strongest option in this group when the buyer is evaluating a hosted PBX platform as a resale business, not simply choosing an internal phone application.
Zoom Phone
Zoom Phone works well for businesses that already use Zoom Meetings and want to keep calling, meetings, messaging, and collaboration under one account. Zoom also supports bring-your-own-carrier deployments, which can help organizations transition gradually or retain existing carrier arrangements. The tradeoff is channel ownership and hands-on setup. A business buying Zoom directly is purchasing a Zoom-branded service and largely self-configuring it. An MSP can manage the environment afterward, but that is a different experience from a platform built around a certified partner designing and implementing the deployment from day one.
RingCentral
RingCentral offers a broad UCaaS feature set with business calling, messaging, video meetings, reporting, mobile applications, call handling, and integrations. Its published plans also show how quickly the price climbs when features such as automatic call recording, advanced routing, larger toll-free allotments, and higher SMS limits move to the pricier tiers. RingCentral can be a strong direct-service choice for midmarket and enterprise organizations that plan to self-manage the deployment. A reseller should still examine branding, billing control, customer ownership, and support responsibilities, since none of those come bundled with a certified implementation partner the way they do with a channel-built platform.
Nextiva
Nextiva combines business voice with customer experience and contact center capabilities. Its published plans include voice, messaging, video, routing, reporting, and customer engagement features, with advanced capabilities available at higher tiers or through add-ons. Nextiva is worth considering when the end customer wants a packaged direct service. MSPs should confirm whether the partner program supports the desired level of customer ownership and whether each required feature is included in the advertised plan.
Zoom, RingCentral, and Nextiva are strong direct products. The gap for a reseller is structural, not feature-level: direct platforms hand the customer a login and a box of phones, while a white-label model hands you the brand, the margin, the billing, and a certified partner to design and install the system.
Hosted PBX vs. SIP-Only Providers
SIP trunking connects an existing PBX or UC platform to the public telephone network. SIP trunks can reduce carrier complexity and support number portability, but SIP-only service does not usually provide the complete user experience of a hosted PBX.
A hosted PBX includes the call-control software, user administration, softphones, routing, voicemail, messaging, reporting, and support workflows. SIP is one component of that system. SIP-only service can be the right choice when a customer already owns a well-supported PBX and wants carrier connectivity. It is a weaker fit when the goal is to replace on-premise hardware, support remote users, add mobile calling, or sell a complete communications service under a partner brand.
Hosted PBX vs. Standalone AI Voice Tools
AI Voice Agents can answer calls, collect information, route conversations, book appointments, and provide summaries. A standalone tool may still require a separate phone system, carrier connection, CRM integration, billing workflow, and support process.
The buyer should ask where the AI Voice Agents sit in the call flow and how usage appears on the invoice. A tool that requires separate provisioning and manual reconciliation may create more administrative work than it removes. An integrated platform gives the partner one place to manage the phone system, customer account, call routing, usage, and billing. That structure is especially useful for MSPs that want to add AI Voice Agents without building another disconnected service line.
Questions to Ask Before Signing
Use these questions during hosted PBX provider evaluations:
- Can the platform support multiple customer tenants from one partner portal?
- Can the partner control branding, pricing, packaging, and customer-facing communications?
- Which features are included in the base license?
- How are taxes, E911 charges, toll-free minutes, SMS, and usage-rated services billed?
- Who handles first-line support and who handles escalations?
- What happens when a customer adds or removes users mid-cycle?
- How does number porting work, and who manages the port?
- Can the provider support failover during an internet or service outage?
- Does the system integrate with the customer's CRM and productivity tools?
- Can AI Voice Agents be quoted, provisioned, monitored, and billed in the same workflow?
- What customer data can be exported if the partner changes providers?
- Are partner margins based on fixed wholesale rates, revenue share, or a separate program structure?
- Who actually shows up to design and implement the deployment, and are they certified on the platform?
The last two questions often expose the difference between a true channel platform and a direct product with a partner checkbox.
This article is informational and does not constitute legal, tax, or regulatory advice. Emergency-calling obligations, including those under Kari's Law and RAY BAUM'S Act, and telecom tax treatment depend on your specific systems, traffic, and jurisdiction. Consult qualified counsel or a telecom tax specialist before acting on anything in this post.
The Bottom Line on Choosing a Hosted PBX
Hosted PBX is not just a replacement for an office phone system. For an end customer, it is a communications platform. For an MSP or reseller, it is also a product, a support obligation, a billing process, and a recurring revenue stream.
Compare the full operating model, not only the monthly seat price, and pay attention to who is actually on site to design and implement the system. Viirtue is a particularly strong fit for partners that want white-label control, integrated billing through ViiBE, hosted PBX, SIP connectivity, AI Voice Agents, and a nationwide network of more than 500 certified partners to back the deployment, all under one partner-led business.
Review the Viirtue partner program or request a demo before making a final hosted PBX provider decision.
FAQ: Hosted PBX Buyer’s Guide
What is the difference between hosted PBX and VoIP?
VoIP is the technology used to carry voice calls over an IP network, while hosted PBX is the cloud phone system that manages users, extensions, routing, voicemail, devices, and business calling features.
How much does hosted PBX cost per user?
Published plans commonly start around $10 to $20 per user per month for basic calling, while more advanced plans cost more. The final price depends on calling scope, messaging, hardware, support, taxes, emergency services, and add-ons.
Is hosted PBX secure?
Hosted PBX can be secure when the provider uses encryption, access controls, authentication, monitoring, fraud protection, and documented incident procedures. Buyers should evaluate the provider’s controls instead of treating cloud delivery as a security guarantee.
Can an MSP resell hosted PBX under its own brand?
Yes, but only some providers are designed for full white-label resale. Confirm that the program lets the MSP control branding, pricing, packaging, billing, support, and the customer relationship.
Should a business choose hosted PBX or SIP trunking?
Choose hosted PBX when the business needs a complete cloud phone system. Choose SIP trunking when the business already has a PBX or UC platform and only needs carrier connectivity.
