13 Best Phone Call Over IP Service Providers

Last updated on November 3rd, 2025 at 12:40 pm

In today’s hyper-connected world, communication has evolved beyond physical boundaries, thanks to the rise of technology. Phone over IP service providers has transformed the landscape of connectivity. These services allow you to make voice and video calls via the Internet, making them cost-effective and efficient alternatives to traditional telephony. As this technology continues to broaden its reach, choosing the right provider can be a daunting task. Phone calls over IP (VoIP) have become the backbone of modern business communication, offering scalability, cost efficiency, and AI-powered automation. As businesses continue to evolve in 2025, having a reliable VoIP provider is crucial for seamless communication.

This guide compares the top 13 phone-over-IP providers for small to enterprise teams — pricing, key features, call quality, CRM integrations, and global SIP/DID support. Ideal if you need comparisons for buying, migrating, or integrating voice over IP into your stack.

What is the Most Reliable Phone Call over IP Provider for Businesses?

FreJun is a trusted provider of phone call over IP services, known for its stable call quality, easy setup, remote team support, and smart analytics tailored for business communication.

What are the Best Phone over IP Providers in 2025?

These are the top 13 Phone over IP Service Providers to help guide your decision.

1. FreJun

FreJun, as one of the top Phone over IP service providers, offers high-quality, affordable voice communication with features like call forwarding, voicemail to email, and virtual numbers. Targeting businesses, freelancers, and remote workers, Frejun ensures secure, clear calls via robust infrastructure and standard VoIP protocols. Through strategic marketing, partnerships, and regulatory compliance, Frejun aims for scalable growth and profitability with competitive pricing and diverse revenue streams.

Key features: High-quality voice calls, Affordable pricing plans, Mobile and desktop applications, Call forwarding, Voicemail to email, Call recording,  Virtual numbers, and Secure communication.

Pricing:  Standard: Begins at $14.49 per user, per month.

                Professional: Starts at $16.69 per user, per month.

G2 Review: 4.9 out of 5

What is the difference between Traditional Landline and VoIP

2. Vonage

Offering combined voice and video solutions, Vonage acts as one of the top Phone over-IP service providers as it provides a seamless transition to VoIP technology. With its high-quality calls, low-cost plans, and advanced features like voicemail to email transcription, it’s an excellent option for both small businesses and large corporations. Vonage’s platform is designed to be flexible and scalable, ensuring that it can meet the changing needs of businesses as they grow and evolve. The company also places a strong emphasis on security, with robust measures in place to protect the privacy and integrity of communications.

Key features: Combined voice and video solutions, High-quality calls, Low-cost plans, Voicemail-to-email transcription, Flexibility and scalability, and Strong emphasis on security.

Pricing: Contact the Vonage team for pricing details.

G2 Review: 4.3 out of 5

3. RingCentral

Praised for its robust features and ease of use, RingCentral delivers a myriad of communication solutions. Beyond voice calls, it offers video conferencing, team messaging, and even file sharing. It also supports integration with various productivity tools, making it a one-stop solution for business communication needs. RingCentral’s commitment to innovation is evident in its continuous updates and feature enhancements, which ensure that businesses have access to the latest communication technologies.

Key features: Voice calls, Video conferencing, Team messaging, File sharing, Integration with productivity tools, Ease of use, and Robust features.

Pricing: Starts at $20 per month.

G2 Review: 4.0 out of 5

4. Mitel

Mitel is renowned for its tailor-made solutions for businesses of all sizes. It provides versatile cloud-based VoIP services, complete with advanced features such as unified communication and collaboration tools. Mitel also offers excellent customer service and technical support, ensuring that any issues are promptly addressed and resolved. The company’s solutions are designed to be intuitive and user-friendly, minimizing the learning curve for new users and allowing businesses to reap the benefits of VoIP technology quickly.

Key features: Tailor-made solutions for businesses of all sizes, Versatile cloud-based VoIP services, Unified communication and collaboration tools, Excellent customer service and technical support, and Intuitive and user-friendly design.

Pricing: Contact the Mitel team for pricing details.

G2 Review: 4.2 out of 5

5. Nextiva

Nextiva is not just a VoIP provider; it’s a comprehensive business communication suite. Its service includes features such as voice and video calls, CRM integration, and AI-driven analytics. Moreover, Nextiva’s mobile app allows for effective business communication on the go. The company’s focus on customer satisfaction is reflected in its responsive customer support and dedication to providing a high-quality service experience.

Key features: Voice and video calls, CRM integration, AI-driven analytics, Mobile app for business communication on the go, Responsive customer support, and High-quality service experience.

Pricing: Starts at $18.95 per user per month.

G2 Review: 4.5 out of 5

6. 8×8

8×8 provides cloud-based VoIP solutions that are ideal for global businesses. With its unlimited international calling feature and team messaging, it makes international communication hassle-free. Plus, it integrates smoothly with third-party applications like Salesforce and Google Workspace. 8×8’s services are designed to be reliable and secure, with a strong emphasis on maintaining high-quality audio and video communications.

Key features: Cloud-based VoIP solutions, Unlimited international calling, Team messaging, Reliable and secure services, High-quality audio and video communications.

Pricing: Contact the 8×8 team for pricing details.

G2 Review: 4.1 out of 5

7. Ooma

Ideal for small to mid-sized businesses, Ooma acts as one of the high-quality, affordable VoIP service providers. Its standout features include virtual faxing, a virtual receptionist, and extension dialing. Ooma’s service boasts an intuitive interface, making it impressively user-friendly. The company also provides a range of hardware options to complement its services, including desk phones and conference phone systems.

Key features: High-quality, affordable VoIP service,  Virtual faxing, Virtual receptionist, Extension dialing, Intuitive, user-friendly interface.

Pricing: Starts at $19.95 per user per month.

G2 Review: NA

8. Grasshopper

Grasshopper symbolizes simplicity and efficiency. It’s perfect for entrepreneurs and startups seeking a robust yet straightforward VoIP system. It offers unique features like business texting, custom greetings, and simultaneous call handling. Grasshopper’s platform is designed to be easily set up and managed, allowing businesses to quickly establish a professional phone presence.

Key features: Business texting, Custom greetings, Simultaneous call handling, Easy setup and management, Professional phone presence.

Pricing: Contact the Grasshopper team for pricing details.

G2 Review: 4.0 out of 5

9. Skype for Business

Not just for personal use, Skype for Business delivers an effective VoIP service that integrates with Microsoft Office 365. It allows users to conduct voice and video calls, share files, and schedule meetings – all from a single platform. Skype for Business is known for its reliability and wide adoption, making it a familiar choice for many organizations.

Key features: Voice and video calls, Integration with Microsoft Office 365, File sharing, Meeting scheduling and management, Reliability, and Wide adoption.

Pricing: Starts at Rs. 200.60 per month.

G2 Review: 4.3 out of 5

10. VoIPstudio

VoIPstudio acts as one of the top Phone over IP service providers by offering a wealth of features for businesses, including call recording, virtual numbers, and conference calling. With its competitive pricing and 30-day free trial, it’s a risk-free option for businesses exploring the world of VoIP. VoIPstudio’s platform is designed with flexibility in mind, allowing businesses to customize their phone systems to match their specific requirements.

Key features: Call recording, Virtual numbers, Conference calling,  Competitive pricing, 30-day free trial, Customizable phone systems, Flexibility.

Pricing: Starts at $16.99 per user per month.

G2 Review: NA

11. Dialpad

Dialpad offers AI-powered voice and video communication solutions. Its unique features include real-time transcription and voice analytics. The platform also seamlessly integrates with several business applications such as Salesforce, LinkedIn, and Google Workspace. Dialpad’s focus on leveraging artificial intelligence to enhance communication sets it apart from other providers.

Key features: Real-time transcription, Voice analytics,  Integration with business applications like Salesforce, LinkedIn, and Google Workspace, AI-powered features to enhance communication.

Pricing: Starts at $15 per user per month.

G2 Review: 4.4 out of 5

12. Cisco Webex

A trusted name in the tech industry, Cisco’s Webex offers a feature-rich VoIP service. It integrates voice and video calling with team collaboration tools, making it perfect for enterprises needing omnichannel communication. Cisco Webex is known for its robust security features and enterprise-grade reliability, making it a preferred choice for large organizations.

Key features: Voice and video calling, Team collaboration tools, Omnichannel communication capabilities, Robust security features,  Enterprise-grade reliability.

Pricing: The business plan starts at Rs. 1250 per month.

G2 Review: 4.3 out of 5

13. Microsoft Teams

Microsoft Teams not only offers comprehensive team collaboration tools but also comprehensive VoIP services. Integrated with Office 365, it’s an excellent option for businesses already in the Microsoft ecosystem. Microsoft Teams is designed to be a central hub for teamwork, combining chat, meetings, and file collaboration in a single platform.

Key features: Comprehensive team collaboration tools, Integrated with Office 365, Voice and video calling, Chat functionality,  Meeting scheduling and management,  File collaboration, and sharing.

Pricing: The basic business plan starts from $6 per user per month.

G2 Review: NA

Which voice IP providers offer the best call quality and uptime?

When evaluating the best voice IP providers, uptime and call quality matter more than anything else. The right phone over IP provider should deliver clear, uninterrupted voice and guarantee near-perfect reliability.

FreJun stands out here with enterprise-grade call quality backed by redundant cloud infrastructure and optimized routing. Its 99.99% uptime SLA, high-definition audio, and intelligent routing ensure that every call — whether local or international — stays crisp and stable. Unlike typical voice IP services, FreJun automatically prioritizes call packets and monitors latency, jitter, and MOS in real time.

Top features ensuring superior quality:

• 99.99% uptime and geo-redundant servers
• HD voice codecs for crystal-clear clarity
• Automatic call routing and fallback during network congestion
• Real-time quality monitoring dashboard
• Direct SIP connections with minimal packet loss

Why FreJun: Whether you run a 10-person sales team or a large enterprise, FreJun ensures your team never loses a lead due to call drops or quality issues.

How Secure Is Voice Over IP and What Security Features Are Essential?

Security is a major factor when choosing any voice IP service. Businesses need assurance that customer calls, recordings, and CRM data are safe from interception or unauthorized access.

FreJun goes beyond standard voice IP providers by offering end-to-end encryption (TLS + SRTP) for every call, including those routed through CRM systems. All voice data, recordings, and analytics are stored in secure, compliant data centers, ensuring total privacy. The platform also provides real-time fraud detection, access control, and activity monitoring.

Key FreJun security features:

• End-to-end encryption for both signaling and media
• GDPR and SOC-2 compliant infrastructure
• Multi-layer authentication and IP whitelisting
• Encrypted call recording storage
• AI-based anomaly detection and alerting

Why FreJun: With compliance-ready infrastructure and real-time fraud prevention, FreJun ensures your phone over IP communication is as secure as it is smart.

Which Providers Offer SIP Trunking, Virtual Numbers, and Global Coverage?

If your business operates across multiple locations, you’ll need a voice IP provider that offers SIP trunking, virtual numbers, and reliable global connectivity.

FreJun provides SIP trunking and local virtual numbers across 100+ countries, allowing you to establish a global presence without complex infrastructure. Whether you want local numbers in the UAE, UK, or India, FreJun ensures high call quality, instant provisioning, and compliance with local telecom laws.

FreJun’s SIP Trunking & Global Features:

• Global SIP trunking for inbound & outbound calling
• Instant virtual number activation in 100+ countries
• Local, toll-free, and mobile numbers available
• Direct routing with local carriers for better quality
• Seamless integration with CRMs like Zoho, HubSpot, and Salesforce

Why FreJun: Expand globally without losing local touch — FreJun’s voice IP service ensures every international call feels local and reliable.

Insights Table on IP Services (2025)

Feature	Importance in 2025
AI-Powered Automation	Essential
Cost Efficiency	High
Global Connectivity	Must-Have
Cloud Security	Critical

Conclusion

Adopting Phone over IP services can revolutionize the way your business communicates, enhancing productivity and cost-effectiveness. The market is ripe with various service providers, but the right choice depends on your specific business needs and objectives. Whether you’re a small startup or a big multinational enterprise, our curated list of the top 13 Phone over IP Service Providers provides a solid starting point in your search for the perfect digital communication partner. The future of business communication is here, and with the help of a reliable Phone over IP service, your organization can be at the forefront of this exciting evolution.

By leveraging FreJun and other top VoIP providers, businesses can enhance communication efficiency, lower costs, and stay ahead in 2025!

Further Reading: 13 Outstanding Call Center Phone System Service Providers 

Frequently Asked Questions