Slingshot VoIP Alternatives

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

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

Virtual phone system that lets you run your business from anywhere.

FlexiQuiz is a powerful online test generator that enables you to create engaging online quizzes, tests, or exams in minutes. Choose from 100's of features to create a customized quiz that meets your objectives for business, education, or fun.

Try for free freemium $25.0 / Monthly (Essentials plan)

The Cloud Phone System of choice for modern sales and support teams. We help end clueless conversations by adding context to every call.

paid $30.0 / Monthly

Line2 adds a second phone number or complete cloud business phone system to smartphones & computers that's robust yet affordable. Buy online or get a custom quote.

YouMail turns visual voicemail into a personal assistant for handling all your missed calls.

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

Call Me Private masks your phone number behind a virtual number, for privacy, or for a professional...

Wireless business phone system built for sales and support team.

Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.

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

Use your iPhone, iPad or iPod touch to make and receive calls using your 8x8 Virtual Office phone...

VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.

Try for free paid Free Trial $4.99 / Monthly (User)

Work locally, grow globally

Open Source paid Free Trial $25.0 / Monthly