Avaya IP Office Alternatives

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

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.

The most intuitive platform to manage projects and teamwork

Visit website paid Free Trial $14.0 / Monthly (per seat)

Hosted PBX with CRM integration and mobile apps

Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.

freemium $15.99 / Monthly (Pro - Great for Small Teams)

An open source telephony switching and private branch exchange service for Linux.

Open Source

From cloud PBX to conference calls and meetings to online events, GlobalMeet is a business communications platform that helps take you where you need to go.

Vonage Business Communications transforms communications and activates conversations anytime, anywhere. Learn more about unified communications now!

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

Find cost and pricing information on implementing Intermedia Unite into your business. With customizable plans available, discover the perfect plan for your business today.

Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs

Secure and flexible cloud phone services and unified communications.

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.)

Find the perfect phone system for your business. Digium’s business phone systems are available in the cloud and on-premises, with all features included