Top 7 Enterprise VoIP Service Providers for Large Businesses

Top enterprise VoIP service providers for large businesses include Calilio, Nextiva, RingCentral, Vonage, Ooma, Dialpad, and 8x8. These providers offer feature-rich call management solutions tailored for high-volume operations, global teams, and complex infrastructure needs.

Calilio is one of the best enterprise VoIP providers. It offers a cloud-based business phone system that supports global reach with virtual phone numbers from over 100 countries. This enables businesses to maintain a local presence and connect seamlessly with teams, customers, and stakeholders worldwide.
Moreover, Calilio’s cloud-based VoIP phone system allows businesses to manage phone calls, messages, and voicemails, all from a single unified platform. This makes it easier for teams to collaborate and respond quickly, regardless of location. In addition, its solutions integrate advanced technologies such as advanced call routing and CRM integrations, tailored to handle the complex and diverse telephony needs of larger enterprises.

Features:

• Power dialer for efficient outbound campaigns.
• Instant messaging and calls with clients and distributed teams worldwide.
• Allows seamless transition of existing numbers and sharing of business numbers among members.
• Call analytics that deliver detailed data on call patterns and customer preferences.
• IVR Systems that automate customer inquiries and efficiently route calls.
• Convert calls into accurate text transcripts for easy reference and analysis.
• Gain insights into customer emotions with sentiment analysis to identify satisfied or dissatisfied callers.

Pricing:

Nextiva is a top enterprise VoIP provider known for delivering a secure, reliable, and feature-rich phone system designed specifically for large organizations. With multiple data centers and a commitment to 99.999% uptime, it ensures businesses stay connected without interruptions.

Nextiva combines essential tools like unlimited calling, video conferencing, instant messaging, call routing, and voicemail with seamless integration to popular business applications such as CRM and customer support software. This makes it easy for companies to manage all communications in one place while supporting remote work through apps on desktops, mobiles, and browsers.

Features:

• Automatically direct callers to the right department or person with customizable menu options.
• Share presentations or documents during calls or video conferences.
• Record conversations and access detailed call reports for training, compliance, and performance insights.
• Voicemail-to-email and AI-powered transcription.

Pricing:

RingCentral is a leading enterprise VoIP provider that offers a comprehensive cloud-based platform, RingEX™, designed to meet the complex communication needs of large organizations. It combines voice, video conferencing, team messaging, SMS, fax, and advanced call management features into a single, user-friendly application.

With 99.999% uptime, global infrastructure, and integrations with major business tools, RingCentral supports seamless collaboration across distributed teams and offices. It also provides enterprise-grade security, HIPAA and GDPR compliance, and robust APIs for custom integrations, making it ideal for industries with strict regulatory requirements.

Features:

• Personal AI assistant transcribes calls and generates summaries with key updates.
• Drag-and-drop call menus route callers to the right service or department automatically.
• Create custom ring orders for shared numbers, ringing team members individually or simultaneously.
• Manage high call volumes by efficiently directing calls to the next available team member.
• Real-time chat with file sharing and task management accessible on mobile and desktop.
• Routes calls intelligently based on business hours or team availability.

Pricing:

Vonage is a trusted enterprise VoIP service provider that delivers a reliable business phone system through its cloud-based platform, Vonage Business Communications (VBC). The platform enables companies to manage voice calls, messaging, and video conferencing in a single system, helping improve operational efficiency and collaboration.
Vonage integrates with popular business applications and CRMs, enabling enterprises to unify their communication within existing workflows. Its video conferencing supports up to 200 participants, ideal for large meetings or company-wide calls.

Features:

• Allows recording of important calls for compliance, training, and quality control.
• Enables quick review of messages with text transcriptions for better efficiency.
• Distributes incoming calls across multiple extensions to manage high call volumes.
• Automates call handling to improve customer experience and reduce missed calls.
• Supports real-time communication and file sharing across departments.

Pricing:

Ooma is a cloud-based enterprise business phone system that combines voice calling, video conferencing, messaging, and contact center features into one unified solution. Ooma’s system is scalable and flexible, supporting both in-office and remote teams with tools that enhance productivity and customer service.
Ooma’s integration with Microsoft Teams and CRM systems streamlines workflows and enhances collaboration across various departments. With strong security, enhanced call blocking, and comprehensive analytics, Ooma is built to support enterprise communication needs.

Features:

• Host reliable, high-quality voice or video meetings for internal teams or customer engagements. 
  Record calls enterprise-wide for quality assurance, training, and compliance purposes.
• Automates call routing based on caller input.
• Supervisors can silently monitor, coach via whisper, or take over calls to ensure service quality and agent support.
• Automatically converts voicemails to text.

Pricing:

Dialpad is a cloud-based phone system designed to connect global teams with a unified communications platform that combines voice calls, video meetings, and messaging. It offers 100% uptime with a robust service level agreement, ensuring reliable and uninterrupted communication for large organizations.
Dialpad integrates with popular tools like Salesforce, Microsoft Outlook, Azure, and Okta to streamline workflows and improve collaboration. The platform also offers call recording with privacy controls and detailed call analytics to optimize performance.

Features:

• Provides real-time transcription, automated meeting summaries, and live coaching to boost team performance.
• Automates call distribution based on skill, availability, or priority.
• Converts voicemails to text for faster message review and easy forwarding.
• Provides detailed insights on call volumes, IVR usage, and team performance for optimized resource planning.
• Real-time coaching for customer-facing agents to improve performance and optimize customer interactions.

Pricing:

8x8 is a leading provider of enterprise-grade VoIP and unified communications solutions. It offers a cloud-based business phone system that helps large organizations connect teams, improve collaboration, and enhance customer engagement across global locations.
8x8 helps large businesses manage high call volumes through an advanced call queue system, connect remote teams, and integrate with tools like CRM systems. It ensures secure communication, offers 24/7 customer support, and allows easy scaling as the business grows.

Features:

• Real-time AI-powered call transcription and sentiment analysis.
• Virtual agent for self-service, routing, payment processing, and knowledge base support.
• Secure file sharing, group chat, and quick transition from chat to calls or video.
• Supports various third-party integrations, including Salesforce, Google Workspace, Microsoft Outlook, Alvaria, and Calabrio.

Pricing:

To choose the best enterprise VoIP provider, assess your business needs, including scalability, remote team support, and integration with existing tools. Then compare providers based on advanced features, pricing, reliability, and request a demo to see how the platform fits into your workflows.

Understand your current and future communication requirements. Consider the number of users, the locations of your teams, and the type of communication your business relies on, voice calls, video conferencing, messaging, or all of these. By clarifying your priorities, you'll be able to determine the necessary features for an effective communication solution.

When evaluating VoIP providers, it's essential to consider not just the basic calling features but also the advanced capabilities they offer. Consider real-time call transcription, an interactive voice response (IVR) system, and sentiment analysis. Other valuable features include voicemail-to-text, call recording, call notes, video conferencing, and intelligent call routing.

A scalable solution is essential for large enterprises. Choose a VoIP provider that enables quick user management, supports multiple locations, and facilitates global growth without downtime. Prioritize reliability, as leading providers guarantee 99.9% to 100% uptime through Service Level Agreements (SLAs) to ensure seamless business operations.

Additionally, evaluate the pricing structure. Understand monthly fees, setup costs, and any additional charges for features or international calls.

Check if the provider supports easy integrations with your CRM, helpdesk, productivity suites, team collaboration tools, and other key applications to streamline workflows.

Before finalizing your decision, test the platform with a demo or free trial. This allows you to test the platform’s features, call quality, customer support, and ease of use before committing to a subscription.

Large businesses must choose the right enterprise VoIP service provider to manage a high volume of calls, boost productivity, and support a distributed workforce. By evaluating the features and pricing of different VoIP providers, you can select the right phone system that meets your current requirements and adapts as your organization grows.
 

Yes, most enterprise VoIP systems offer mobile apps or support a softphone.

Cloud-based VoIP solutions for large enterprises are secure because they use encryption, multi-factor authentication, and compliance with industry standards like HIPAA and GDPR.

Implementation can take several days to weeks, depending on the organization's size, infrastructure, and customization needs.