1. RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies

    freemium $19.99 / Monthly (All-in-One Phone, Team Messaging, and Video Conferencing.)

  2. Google Voice gives you one number for all your phones, voicemail organized in an email format, free...

  3. Business VoIP, cloud phone systems trusted by more than 150,000 companies. Powered by the leading cloud PBX VoIP platform, Nextiva is rated the best business VoIP service provider.

  4. Grasshopper enables entrepreneurs to build a virtual office that connects callers to employees, wherever they are.

  5. Switch is a cloud-based phone system built for Google Apps users.

  6. CrazyCall is cloud based platform for sales and marketing teams doing cold calling, market research, information or loyalty campaigns.

  7. UberConference provides a rich visual interface for conference calls. Simple, visual, and free to use, it's audio conferencing done right.

  8. 8x8's VoIP business phone systems deliver affordable, cloud-based voice, video, messaging, and call center solutions, helping you serve customers anytime, anywhere.

  9. Convoso's Cloud Contact Center helps SMBs increase sales, marketing and customer service success.

  10. Skype for Business, formerly Lync, is unified communications platform that enables instant messaging, conferencing and online meetings

  11. Free and secure calls and messages to anyone, anywhere. Keep your conversations going no matter where you are.

  12. FluentStream Technologies is an advanced telecommunications company with a core focus on cloud-based applications.