7 Best Cloud-Based Phone Systems 2025
Legacy phone systems were once the standard. Today, they’re costly to maintain, difficult to scale, and often inadequate for supporting distributed teams or serving international customers. This reality increasingly drives companies to switch to a cloud-based phone system. But finding a global communications solution that meets current needs and grows and adapts with you is the real challenge.
The right solution must deliver flexibility, reliability, and scalability, often featuring robust international coverage, seamless integrations with leading contact center tools, and built-in features to monitor and optimize call quality. These capabilities empower businesses to streamline communications, future-proof operations, and remain agile in a rapidly evolving market.
To help you navigate this landscape, let’s look at the seven best cloud-based phone systems for your business.
7 best cloud-based phone systems that scale with your business
Here’s a comparison of the seven leading cloud-based phone system providers that can support the communication needs of modern organizations:
| AVOXI | 99.995% uptime | Enterprise-grade, multi-region | Native and API integrations (Salesforce, Microsoft Teams, etc.) | Over 150 countries | TLS/SRTP encryption, SOC 2, GDPR compliant |
| RingCentral | 99.999% uptime | Highly scalable, UCaaS-based | Over 300 integrations | Over 99 countries | HIPAA, SOC 2, ISO/IEC 27001 |
| Nextiva | 99.999% uptime | SMB to mid-market growth | CRM and UCaaS integrations | Over 100 countries | SOC 2, TLS encryption |
| Dialpad | 100% uptime | High | Google Workspace, Microsoft 365, Salesforce, Zendesk, and Slack | Over 50 countries | AI-backed security, TLS |
| Zoom Phone | 99.999% uptime | Native to Zoom ecosystem, Enterprise-grade | Zoom, Microsoft 365, Google Workspace, Salesforce, and Slack | Local telephony in 49 countries (over 45 more via partners) | TLS 1.2, AES-256 encryption, Zoom Node for local survivability |
| 8x8 | 99.999% uptime | Global UCaaS infrastructure | Microsoft 365, Salesforce, and Google Workspace | Over 100 countries | TLS/SRTP encryption, SOC 2, HIPAA compliant |
| CloudTalk | 99.99% uptime | Best for call centers | CRM, helpdesk, and e-commerce platforms | Over 160 countries | TLS/SRTP encryption, GDPR compliant |
1. AVOXI
AVOXI is a cloud-native global voice platform built for enterprises that need consistent, scalable communications across multiple countries. Unlike one-size-fits-all platforms, AVOXI delivers tailored solutions to manage complex, large-scale voice infrastructures and optimize international call quality.
Number Porting Benefits
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Features:
- Global coverage in over 150 countries: Centralized communications across regions with access to local, toll-free numbers, and mobile numbers
- Enterprise-grade scalability: Expands your communications infrastructure without hardware limitations or regional bottlenecks, backed by 99.995% uptime
- Robust integrations: Connects your phone system seamlessly with essential tools for streamlined operations and efficient workflow
- Intelligent call routing: Directs calls based on time, geography, or Interactive Voice Response (IVR) menus for optimal customer experience
- Performance monitoring and analytics: Delivers real-time visibility into call insights, such as call quality, usage, and agent performance
Cons:
- Advanced customization options may require onboarding support.
- Pricing varies based on international phone number availability and call volumes.
2. RingCentral
RingCentral is a popular unified communications (UC) platform offering voice, video, and team messaging services. It’s best for enterprises seeking strong collaboration tools to seamlessly integrate into their voice systems.
Features:
- Unified communications hub: Offers voice, video, fax, and SMS in one seamless platform
- High integration compatibility: Works with over 300 apps, including Salesforce, Microsoft 365, and Google Workspace
- Global phone system: Supports users and numbers in over 100 countries
Cons:
- Managing the system can become complex without dedicated IT support.
- Some features are only available at higher-tier plans.
3. Nextiva
Nextiva’s business phone system focuses on simplicity and communication alignment for growing teams. It’s an ideal cloud phone service for mid-market businesses that prioritize ease of use and internal collaboration.
Features:
- Advanced call routing: Directs incoming calls to the right department or team member, enhancing efficiency
- HD call quality: Delivers crystal-clear audio to ensure professional, seamless communication
- Integrated team messaging: Combines calls, texts, and video meetings into one platform for streamlined collaboration
Cons:
- Global coverage is limited compared to other enterprise-first platforms.
- Lower-tier plans only offer basic reporting and analytics.
4. Dialpad
Dialpad combines Voice over Internet Protocol (VoIP) phone system functionality with AI-powered features to support hybrid teams and digital-forward enterprises.
Features:
- AI voice intelligence: Transcribes calls and provides real-time coaching to improve customer support interactions
- Unified messaging: Lets you switch effortlessly between text, calls, and video in one app so everything stays connected
- Mobile app integration: Keeps your business communications flowing smoothly, whether you’re at your desk or on the go
Cons:
- The platform may lack the advanced telephony features large global contact centers need.
- International calling may require add-ons.
5. Zoom Phone
Zoom Phone is a cloud-hosted Private Branch Exchange (PBX) solution designed for companies already using Zoom for meetings and webinars. It excels at streamlining communications within the Zoom ecosystem.
Features:
- Real-time call management: Allows you to handle calls instantly with features like call transfer, hold, and recording
- Seamless integration with Zoom Meetings: Switches effortlessly between phone calls and video conferencing meetings
- Global reach and scalability: Supports businesses with international calling capabilities and easy expansion options
Cons:
- Its international coverage spans about 45 countries.
- The platform relies heavily on the Zoom ecosystem for full functionality.
6. 8x8
8x8 is a global Unified Communications as a Service (UCaaS) and contact center provider known for its security and reliability. Its cloud PBX offers features that support high call volumes and complex routing needs.
Features:
- Unified communications integration: Combines voice, video, and messaging into a seamless experience for better team collaboration
- Reliable uptime: Offers consistent service availability so business communications stay online 24/7
- VoIP technology: Uses VoIP to deliver crystal-clear calls over the internet, cutting down on traditional phone costs
Cons:
- Users may encounter a learning curve with call flow and integration setup.
- Pricing plans can be complex for small businesses.
7. CloudTalk
CloudTalk is a cloud-based phone system that caters to sales and support teams. It delivers a strong feature set for small- to mid-sized teams with international voice needs.
Features:
- Intelligent call routing: Directs calls automatically to the right team member for faster customer support
- CRM integrations: Syncs seamlessly with customer relationship management (CRM) tools to keep your customers’ information in one place
- Add-ons marketplace: Offers extra features like call recording and analytics to customize your experience
Cons:
- It lacks deep enterprise-level customization options.
- Advanced features require higher-tier plans, which can be pricey for smaller teams.
What is a cloud-based phone system?
A cloud-based phone system is a VoIP-powered communications platform that allows businesses to make and receive calls over the internet rather than traditional phone lines or on-premise hardware.
Unlike legacy or on-premise systems that depend on physical hardware and landlines, cloud-based setups only require cloud infrastructure. Cloud phone systems run on secure data centers, with third-party providers managing the infrastructure.
The benefits of using a cloud-based phone system for your business
Modern enterprises choose cloud-based voice platforms to reduce costs and future-proof their operations. Here are the most valuable benefits:
- Global scalability: Add new phone numbers, locations, or team members without installing hardware.
- Lower operational costs: Eliminate expensive PBX hardware, ongoing maintenance costs, and long-distance calling charges.
- Improved flexibility for remote and hybrid teams: Enable team members to make and receive business calls from anywhere using desktop softphones or mobile apps.
- Enterprise-grade call routing and IVR: Ensure every caller reaches the right person or department, regardless of region or time zone.
- Advanced integrations: Connect with platforms like Salesforce, Microsoft Teams, and Zendesk to streamline customer interactions and workflows.
- High reliability and uptime: Achieve 99.999% uptime through globally distributed data centers and failover routing, which most cloud telephony providers offer.
- Real-time insights and analytics: Monitor call quality, agent performance, and call volumes to optimize operations.
Moving to a cloud phone system unlocks the agility global organizations need to scale communications, support diverse teams, and deliver consistently excellent customer experiences.
Essential features of a cloud-based phone system
Below are must-have features to prioritize during your review:
1. Global coverage
A scalable phone system should offer access to virtual phone numbers, including local, toll-free numbers, and mobile numbers, in every market you serve. This ensures that international customers can easily reach you without any friction.
For instance, AVOXI stands out with virtual number coverage in over 150 countries, which makes it a top choice for multinational companies expanding into new territories.
2. Integrations with CRMs and communication platforms
Look for native or API-based integrations with platforms like Salesforce, Microsoft Teams, Zendesk, and HubSpot. AVOXI offers flexible integration options for these and more, including pre-built connectors and an open API, which helps teams sync call data, automate workflows, and improve responsiveness.
3. Call quality monitoring and performance management
Modern cloud-based phone system providers should offer real-time monitoring dashboards, call analytics, and quality management tools. AVOXI excels in this area, providing built-in call quality tools that enable teams to identify issues early, optimize routing, and ensure consistent call clarity across regions.
4. Security and regulatory compliance
Compliance isn’t optional, especially when you’re handling voice data across borders. A global phone system must meet regional standards for data protection and secure communications.
It’s essential to look for security certifications, such as:
- Service Organization Control 2 (SOC 2)
- General Data Protection Regulation (GDPR)
- International Organization for Standardization/International Electrotechnical Commission 27001 (ISO/IEC 27001)
Also, confirm support for secure protocols like Transport Layer Security (TLS) and Secure Real-time Transport Protocol (SRTP).
5. Reliability and uptime guarantees
Business-critical voice systems demand near-perfect reliability, especially for global teams and high-volume contact centers. To ensure this level of performance, look for providers that offer 99.999% uptime service level agreements (SLAs), global failover systems, and redundant data centers that minimize disruption risk.
The cloud-based phone system you choose should feature geo-redundant architecture to guarantee calls stay live, even during outages or spikes.
How to choose the best cloud-based phone system for your business
Use the following considerations to evaluate the top business VoIP providers and identify the best fit for your organization:
1. Assess your current and future business needs
Identify where your existing business phone system is falling short, whether that’s limited global coverage, insufficient integration options, or poor call quality.
Also consider how your business will grow over the next 1–3 years. Will you expand into new territories, launch new support channels, or scale your teams? Your phone system should scale with you, not slow you down.
2. Evaluate integration capabilities
Your phone system should work within your existing communications platform and tech stack, not silo it. Look for solutions that integrate easily with CRMs, contact center software, collaboration tools, and other core platforms.
3. Consider global coverage and regulatory compliance
If you serve customers in multiple countries, ensure your provider offers local number availability and infrastructure for low-latency connections. Also, verify that they comply with regional regulations such as GDPR, the Health Insurance Portability and Accountability Act (HIPAA), and other applicable regulations.
4. Factor in user experience and support
Choose a platform with a user-friendly interface and powerful admin tools—but don’t overlook customer support. When scaling internationally, round-the-clock global assistance, onboarding help, and an assigned account manager are essential.
Pro tip: Before a company-wide cloud phone system rollout, test with a single department or region. A pilot program helps you:
- Evaluate real-world performance and call quality
- Validate integrations with your CRM or helpdesk
- Identify user training needs
- Collect feedback and optimize configurations before full deployment
Starting small minimizes disruption and gives your team a clear path to confidently scale the system.
Take the next step toward seamless global connectivity
Legacy phone systems can’t keep pace with the speed, scale, and complexity of modern business. As enterprises expand into new markets, support remote teams, and integrate more tools into their workflows, upgrading to a cloud VoIP solution for multinational communications is no longer optional—it’s essential.
Here’s what to remember:
- Cloud phone systems offer greater scalability, global reach, and integration flexibility than on-premise alternatives.
- The right provider will deliver high call quality, data security, and compliance with global standards.
- A solution like AVOXI stands out for its international voice coverage, flexible integrations, real-time monitoring tools, and enterprise-grade reliability.
Ready to future-proof your communications? AVOXI’s cloud-based phone system powers global connections for enterprises, wherever you grow. Schedule a demo today.
Commonly Asked Cloud-based Phone Systems Questions
VoIP is the technology behind voice calls over the internet. A cloud phone system, like AVOXI, builds on VoIP by layering advanced features like global number provisioning, intelligent call routing, CRM integrations, quality management tools, and scalability for enterprise needs.
