Introduction
Landlines and closet-mounted PBX boxes are quickly becoming relics. US businesses are moving to cloud phone systems so teams can take calls from anywhere, add users in minutes, and skip the upkeep of physical phone equipment.
But "best" is relative. The right cloud phone system depends on your team size, call volume, existing hardware, integrations, support needs, and compliance requirements. The lowest advertised monthly rate is only one piece of that decision.
Many businesses struggle to compare providers. Pricing pages hide fees, feature lists blur together, and marketing claims rarely match day-to-day performance.
This guide compares Public Telephone Company against four established cloud phone providers, then walks through the practical criteria you should use to make your own decision.
Key Takeaways
- Cloud phone systems deliver calling, voicemail, routing, and messaging over the internet—no on-site PBX required.
- Public Telephone Company delivers scalable hosted VoIP, PBX, UCaaS, and SIP trunking with equipment and 24/7 support, and no upfront hardware cost.
- Compare providers on licensing, call routing, integrations, number porting, and emergency calling, not brand name alone.
- Factor in total cost: hardware, regulatory fees, international minutes, and contract terms.
- Match the provider to your use case, from a small office to a multi-location healthcare group.
Overview of Cloud Phone Systems in the US Business Market
A cloud phone system routes calls and related data over the internet through provider-managed infrastructure. It typically runs on VoIP and cloud PBX technology. Instead of housing switching equipment on-site, your provider hosts it, and you connect through desk phones, softphones, or mobile apps.
Cloud PBX, UCaaS, and SIP Trunking Aren't the Same Thing
People often use these terms interchangeably, but each solves a different problem:
- Cloud PBX / hosted PBX moves PBX management, call routing, and PSTN connectivity into the cloud (TechTarget). You access it through a VoIP phone, desktop app, browser, or mobile app.
- UCaaS bundles calling with messaging, video, and collaboration tools into one subscription platform.
- SIP trunking connects an existing PBX to the public phone network. It's connectivity, not a full communications platform.
- AI voice tools (auto attendants, IVR, conversation intelligence) sit on top of any of the above to automate call handling.
What a Modern System Should Include
Most business-grade platforms bundle these capabilities:
- Business numbers, extensions, and auto-attendants
- Call queues, ring groups, and call forwarding
- Voicemail, call recording, and SMS
- Softphone and desk-phone support
- Analytics, video meetings, and team messaging
- CRM integrations for click-to-dial and call logging
Benefits vs. Real Limitations
| Benefits | Limitations to Watch |
|---|---|
| Less on-site hardware to maintain | Call quality depends entirely on internet quality |
| Add or remove users in minutes | Emergency calling (E911) needs careful setup |
| Supports remote and hybrid teams | Number porting can take days to weeks |
| Wireless and softphone extensions | Device compatibility varies by provider |
| Connects directly to business apps | Costs often exceed the advertised base price |
The UCaaS market reached $23.0 billion in 2025, growing 6% year over year according to Metrigy's UCaaS market research.
Those fundamentals set the baseline for comparing how leading providers deliver features, reliability, and total cost.
Best Cloud Phone Systems for Business
This list only includes providers offering genuine cloud business telephony. Each is assessed on calling capabilities, scalability, integrations, pricing transparency, support, and business fit, not brand recognition.
Public Telephone Company
Public Telephone Company is a US-based telecommunications and interconnected VoIP provider offering cloud-hosted phone systems, unified communications, hosted PBX, SIP trunking, equipment, software, custom integrations, and 24/7 support.
It's built to serve a wide range of business types:
- Small offices and professional practices replacing aging landlines
- Healthcare front offices needing dependable multi-line reception
- Government agencies and municipal departments requiring compliant billing
- Multi-location firms and call centers needing scalable configurations
- Companies with existing PBX hardware wanting SIP trunking or custom integration instead of a stock plan
The company's Hosted VoIP Business Phone Service (Cloud PBX) runs over your existing high-speed internet connection and includes wireless extensions for simpler installation. Equipment ships with the service, so there's no upfront hardware cost.
Deployments scale from a single user to more than 100,000, and custom integration services connect CRM systems and business applications directly into the platform.
Walt Gill of Lake Worth Beach Electric Utilities, a customer since 2005, reported "very little, if any, downtime" using the service, a useful signal for organizations weighing reliability over marketing claims.
| Attribute | Detail |
|---|---|
| Best for | Small offices, healthcare practices, government agencies, multi-location firms, and businesses with existing PBX hardware |
| Core services | Hosted VoIP/Cloud PBX, UCaaS, SIP trunking, equipment, AI auto-attendant/IVR |
| Deployment | Cloud-hosted, works over existing internet connection |
| Scalability | 1 to 100,000+ users |
| Support | 24/7/365 technical support |
| Integrations | Custom CRM and business application integration |
| Hardware | Included with service, no upfront equipment cost |
| Pricing approach | Consultation-based; verify current rates directly |
| Ask during consultation | What's included at my tier, what happens to leased equipment at termination, and what's the exact number-porting timeline? |
Verify current service terms, certifications, and feature availability directly with Public Telephone Company before signing, as with any provider.
RingCentral
RingCentral positions itself as a broad UCaaS platform combining voice, SMS, video, and team messaging with AI features layered throughout, including an AI Receptionist and Conversational Intelligence add-ons.
Best suited for:
- Organizations needing complex call flows across departments
- Teams wanting deep third-party integration coverage
- Businesses with the administrative capacity to manage tiered plans
RingCentral's Core, Advanced, and Ultra tiers include 25, 100, and 200 SMS segments per user monthly, respectively. Unlimited calling covers the US and Canada, with international calling requiring add-on bundles. The platform claims over 330 integrations, including Salesforce, HubSpot, and Zendesk.
Watch for a learning curve on advanced routing features, and note that AI Receptionist ($39), Conversational Intelligence ($60), and Call Queues Booster ($35) are separate add-ons, not included in base pricing.
| Attribute | Detail |
|---|---|
| Best for | Multi-department businesses with complex call flows |
| Pricing model | Tiered per-user pricing; annual billing saves up to 33% |
| Calling regions | Unlimited US/Canada; international via add-on |
| Routing features | IVR, answering rules, forwarding, queues, ring groups |
| Messaging limits | 25-200 SMS segments/user/month by tier |
| Integrations | 330+, including Salesforce and HubSpot |
| Extra fees | AI Receptionist, Conversational Intelligence, and SMS boosters priced separately |
Nextiva
Nextiva emphasizes guided onboarding and accessible support, making it a common pick for small and midsize businesses that want unified communications without a steep setup curve.
Its three published tiers, Core, Engage, and Scale, include unlimited calling across the US, Canada, and Puerto Rico. Core covers basic voice, SMS, and video; Engage adds toll-free numbers and inbound call center features; Scale layers in AI transcription, skills-based routing, and journey orchestration.
Notable tier restrictions:
- Call recording is an add-on at the Core level
- Real-time transcription and AI call notes aren't available until Scale
- Built-in call center functionality isn't included until Scale (it's an add-on on Engage)
- Microsoft Teams and most CRM integrations beyond basic contact sync cost extra
| Attribute | Detail |
|---|---|
| Best for | Small to midsize businesses wanting guided onboarding |
| Plan structure | Core, Engage, Scale (per-user monthly) |
| Calling coverage | Unlimited US, Canada, Puerto Rico |
| Collaboration | Team chat, video meetings, screen sharing on all tiers |
| Support | 24/7 customer support |
| Recording/analytics | Limited on Core; expands through Engage and Scale |
| Contract | Annual pricing requires 12-month minimum for new customers |
Dialpad
Dialpad leans into AI-assisted conversations, real-time transcription, sentiment analysis, and coaching cards, making it attractive to sales and service teams that live inside call and message data.
Its Support, Sell, and Connect plans combine calling, messaging, video, and SMS/MMS. Dialpad AI adds live transcription, voicemail transcription, agent assists, and post-call summaries. The Enterprise video tier supports up to 150 participants.
Considerations before committing:
- International calling requires admin activation and purchased credits; generic SIP devices don't support it
- The Global Unlimited Calling add-on covers up to 65 countries, with pricing varying by plan
- HubSpot's deeper CRM logging features require Dialpad Connect on Pro or Enterprise tiers specifically
- AI Agent features use conversation-based credit pricing rather than flat per-user fees
| Attribute | Detail |
|---|---|
| Best for | Sales and service teams wanting AI-assisted call insights |
| AI features | Live transcription, sentiment analysis, coaching, call summaries |
| Calling/messaging | Voice, SMS/MMS, video across Support/Sell/Connect plans |
| CRM integrations | HubSpot, Salesforce, Microsoft Teams |
| International limits | Available on all plans but requires admin setup and credits |
| Pricing quirks | AI Agent billed per conversation, not per user |
8x8
8x8 targets internationally active businesses and contact centers, with unlimited calling coverage that expands by plan tier, from 14 countries on X2 up to 48 countries on X4 through X8.
Its Contact Center tiers (X6-X8) include a pooled fair-use allowance of 4,000 inbound and outbound minutes per user monthly, with overages billed at standard rates. The platform lists HIPAA, GDPR, and FISMA-related compliance documentation, though you should confirm current scope directly with 8x8.
Fit considerations:
- Strong for multi-country deployments needing broad calling coverage
- Contact-center features are robust but add implementation complexity
- Pricing is quote-based, requiring a sales conversation to get real numbers
- Smaller teams may find the admin console overbuilt for their needs
| Attribute | Detail |
|---|---|
| Best for | Internationally active businesses and contact centers |
| Countries included | 14 (X2) to 48 (X4-X8), by tier |
| Contact center | X6-X8, with 4,000 pooled minutes/user/month |
| Analytics | Real-time supervisor view of call queues and ring groups |
| Compliance | HIPAA, GDPR, FISMA documentation available |
| Pricing | Quote-based, not published |
How We Chose the Best Cloud Phone Systems
Ranking cloud phone providers requires more than reading a pricing page. Here's the evaluation approach behind this list.
Start With Business Fit, Not Feature Lists
Before comparing vendors, map your actual requirements:
- Count your users and concurrent calls across all locations and remote workers
- Document your call flows, including after-hours coverage and international volume
- List existing hardware, such as analog devices or an existing PBX you want to keep
- Identify required integrations, especially CRM and help-desk tools
Calculate True Cost, Not Just the Sticker Price
Headline per-user pricing rarely tells the full story. Add up:
- Desk phones, adapters, and installation fees
- Number porting and taxes
- Regulatory recovery fees
- International minutes and SMS overages
- AI tools, recording, and analytics add-ons
- Early-termination penalties
Verify Reliability and Network Readiness
Vendor uptime claims (RingCentral cites 99.999% availability; Nextiva claims the same) are vendor-stated, not independently audited. Ask about failover behavior, backup connectivity, and bandwidth requirements per concurrent call before assuming any number applies to your setup.
Check Compliance Obligations
Interconnected VoIP providers must support automatic E911 dialing under FCC rules on VoIP and 911 service. That includes obtaining a physical location before activation and providing a way to update it. If you're in healthcare, confirm the provider will sign a HIPAA business associate agreement covering electronic protected health information (ePHI).
Run a Pilot Before You Sign
Test with real devices, actual call flows, and remote connections. Check voicemail, SMS, number porting timelines, and support response times under real conditions, not a sales demo.
Conclusion
The right cloud phone system matches your calling patterns, existing infrastructure, budget, and compliance obligations—and still leaves room to grow.
Before you sign anything:
- Request an itemized quote, not a headline price
- Confirm exactly what's included at your chosen tier
- Test the service on your actual business network
- Establish a migration and number-porting plan in advance
If you're looking for an affordable, scalable cloud phone system with hosted VoIP, equipment, and ongoing support, contact Public Telephone Company for a tailored assessment of your business needs.
Frequently Asked Questions
What is a cloud phone system?
A cloud phone system delivers business calls, voicemail, and messaging over the internet through provider-hosted infrastructure. Unlike a traditional on-premises PBX, there's no on-site switching equipment to maintain.
How does a cloud phone system work?
Calls use VoIP signaling to set up, route, and end sessions across the internet. Desk phones, softphones, and mobile apps connect to the provider's cloud infrastructure, with call quality depending on your network's bandwidth and stability.
How much does a cloud phone system cost for a business?
Pricing models vary: per-user, per-number, usage-based, or custom quotes. Beyond the base rate, budget for hardware, setup, taxes, regulatory fees, international calling, SMS, and premium feature add-ons.
What features should a business phone system have?
At minimum, look for business numbers, extensions, auto-attendant, call routing, voicemail, and mobile/desktop access. Most businesses also need call recording, messaging, CRM integrations, analytics, and reliable emergency calling.
Is a cloud phone system secure and reliable?
Security and reliability depend on the provider's authentication, encryption, and redundancy design, plus your own internet quality and backup connectivity. Ask providers directly about compliance documentation relevant to your industry before signing.
