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Editors' Choice
  • Unified Phone, Messaging, Collaboration, Ticketing, CRM.
  • Voice calling and video conferencing with HD call quality on any device
  • Mobile and desktop app to stay connected with teams and customers
  • Proven Reliability - No Reported Outages in 3 Years
4.6
3177 Reviews
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Best Value
  • Reimagine teamwork with Zoom Workplace, an All-in-one, AI platform
  • Collaborate more, deliberate less
  • One App for Team Chat, Phone, Whiteboard, Meetings & More
  • Zoom AI Companion Available at No Additional Cost with your License
4.2
99 Reviews
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Top Picks
  • Secure solution that can be deployed and scaled up or down in minutes
  • Team members can work from anywhere on any desktop or mobile device
  • Integrates voice, video, team messaging, and a host of business apps
  • RingCentral RingEx Offers Flexibility and Scalability To Improve Collaboration
3.9
556 Reviews
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  • 99.999% uptime reliability and Quality of Service (QoS)
  • Powerful and flexible with 50+ business phone features
  • Supported in 40 + countries and 96+ world numbers for local inbound calling
3.8
262 Reviews
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Fast Deployment
  • Unlimited Calls, Text, Video, and Chat in 47 Countries
  • 99.999% Uptime Guarantee, Reliability, Security
  • 24/7/365 US-based and Multilingual Support
  • Mobile and Desktop App for Unified UCaaS and CCaaS
4.3
738 Reviews
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  • Voice Over IP Calling - Bring Your Own Carrier
  • Collaboration - Projects, Goals, Files, Team Channels, Real-time Coauthoring
  • Instant Messaging - Rich Text, Chat Translation, Priority Notifications, Group Chat
  • Online Meetings - Video & Audio Conferencing, Virtual Events, Screenshare
3.8
15 Reviews
  • Webex UC Suite - Meeting, messaging, calling, events
  • Named a Leader in Collaborative Meetings by Omdia Universe
  • Enable participation in meetings with quizzes, polling, and Q&A
  • Digital whiteboarding solution for everyone, on any device
4.5
13 Reviews
  • Built-in AI transcribes calls, analyzes sentiment and creates call summaries
  • Analytics that give perfect visibility into usage and adoption across global offices
  • Move Seamlessly Between Conversations and Channels in One Platform
4.6
264 Reviews
  • Deploy quickly across teams and time zones with super-simple setup
  • Top-of-the-line security and adherence to standards like SOC 2 Type II, GDPR
  • Integrates easily with Slack, Outlook, Salesforce, Microsoft Teams and more
4.3
155 Reviews
Nextiva
4.6
Editors' Choice
  • Unified Phone, Messaging, Collaboration, Ticketing, CRM.
  • Voice calling and video conferencing with HD call quality on any device
  • Mobile and desktop app to stay connected with teams and customers
  • Proven Reliability - No Reported Outages in 3 Years
Zoom
4.2
Best Value
  • Reimagine teamwork with Zoom Workplace, an All-in-one, AI platform
  • Collaborate more, deliberate less
  • One App for Team Chat, Phone, Whiteboard, Meetings & More
  • Zoom AI Companion Available at No Additional Cost with your License
RingCentral
3.9
Top Picks
  • Secure solution that can be deployed and scaled up or down in minutes
  • Team members can work from anywhere on any desktop or mobile device
  • Integrates voice, video, team messaging, and a host of business apps
  • RingCentral RingEx Offers Flexibility and Scalability To Improve Collaboration
Vonage Business
3.8
  • 99.999% uptime reliability and Quality of Service (QoS)
  • Powerful and flexible with 50+ business phone features
  • Supported in 40 + countries and 96+ world numbers for local inbound calling
8x8 Inc.
4.3
Fast Deployment
  • Unlimited Calls, Text, Video, and Chat in 47 Countries
  • 99.999% Uptime Guarantee, Reliability, Security
  • 24/7/365 US-based and Multilingual Support
  • Mobile and Desktop App for Unified UCaaS and CCaaS
Microsoft Teams
3.8
  • Voice Over IP Calling - Bring Your Own Carrier
  • Collaboration - Projects, Goals, Files, Team Channels, Real-time Coauthoring
  • Instant Messaging - Rich Text, Chat Translation, Priority Notifications, Group Chat
  • Online Meetings - Video & Audio Conferencing, Virtual Events, Screenshare
Webex
4.5
  • Webex UC Suite - Meeting, messaging, calling, events
  • Named a Leader in Collaborative Meetings by Omdia Universe
  • Enable participation in meetings with quizzes, polling, and Q&A
  • Digital whiteboarding solution for everyone, on any device
Dialpad
4.6
  • Built-in AI transcribes calls, analyzes sentiment and creates call summaries
  • Analytics that give perfect visibility into usage and adoption across global offices
  • Move Seamlessly Between Conversations and Channels in One Platform
GoTo Connect
4.3
  • Deploy quickly across teams and time zones with super-simple setup
  • Top-of-the-line security and adherence to standards like SOC 2 Type II, GDPR
  • Integrates easily with Slack, Outlook, Salesforce, Microsoft Teams and more

Though compliance and security may vary according to provider, high-quality UCaaS systems will have: 


  • HIPAA compliance
  • PCI compliance
  • GDPR compliance
  • TLS and SRTP secure
  • Two-factor authentication
  • Third-party security testing 
  • Encrypted
  • Tier III data centers with SOC 2 certification 

VoIP (Voice over Internet Protocol) refers primarily to voice calling and audio conferencing. Though VoIP software is a part of UCaaS, not all VoIP phone systems will offer unified communications.

In most cases, yes, and you’ll likely sign a contract for a minimum of one year up to three years with the provider you select. That being said, an SLA is a good thing. It allows you to have written documentation of guaranteed uptimes, functionalities the tool must be able to complete, and other specifications.


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Richard J.
Founder & CEO, Fanology Social
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