RingCentralRingCentral serves over 500,000 business customers across 170 countries92.7NEW$19.99/user/month
Vonage Business CommunicationsVonage processes over 90 billion minutes of communication annually90.3NEW$12/user/month
Cisco Webex CallingCisco Webex serves over 600 million participants across all regions85.7NEW$18/user/month
GrasshopperGrasshopper enables call forwarding to multiple devices with auto-switching76.3NEW$29/month
NextivaIncludes unlimited calling and advanced call recording with AI-powered transcription74.0NEW$20 per user per month
Zoom Phone seamlessly integrates calling with Zoom Meetings, providing a unified communications solution for businesses already leveraging Zoom's video conferencing ecosystem.
RingCentral delivers cloud-based voice, video, messaging, and fax in one platform, supporting thousands of enterprise customers worldwide.
Vonage provides cloud-based voice services with strong call quality, international presence, and flexible pricing options suitable for small to enterprise organisations.
8x8 combines voice, video, chat, and contact centre capabilities in a single platform, emphasising customer experience and AI-driven insights.
Cisco Webex Calling integrates voice services with Webex's industry-leading meeting and collaboration suite, designed for enterprise reliability and security.
Microsoft Teams Phone enables VoIP calling directly within Teams, making it ideal for organisations already invested in Microsoft 365.
Google Voice provides affordable VoIP services for small businesses and remote workers, integrating with Google Workspace and native Android/iOS apps.
Ooma Office provides straightforward VoIP services designed specifically for small businesses, with optional premium features and hardware options.
Grasshopper (owned by OOMA) provides a virtual phone system with online extensions, call routing, and transcription features for solopreneurs and small teams.
Nextiva offers a comprehensive cloud-based VoIP solution combining voice, video, messaging and customer experience tools. Built for small to mid-sized businesses seeking integrated communications without multiple vendors.
VoIP (Voice over Internet Protocol) transmits voice calls over the internet rather than traditional telephone networks. This allows businesses to reduce infrastructure costs, scale users easily, and integrate calling with other digital tools. Traditional lines require physical hardware at each location, whilst VoIP services operate entirely in the cloud.
Zoom Phone and Microsoft Teams Phone excel for remote teams due to seamless integration with video conferencing and existing workplace tools. RingCentral and Vonage also provide strong options with mobile apps and flexible routing. Choose based on your existing platform investment: Zoom if using Zoom Meetings, Teams if using Microsoft 365.
Select providers with 99.9% uptime guarantees (most enterprise providers offer this), ensure adequate internet bandwidth (minimum 100 Kbps per call), and prioritise network stability with Quality of Service (QoS) settings. Test the service during your trial period and choose providers with strong reputations for call quality in your region, like Vonage or RingCentral.
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