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Top Rated Business Phone Systems Software with Open source - Page 3

Last updated: October 2026

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156 software options

Virtual Switchboard logo

Cloud-based virtual business phone system

Virtual Switchboard is a cloud-based business phone system that allows organizations to manage inbound/outbound calls and streamline communications from any device. It offers advanced features, such as extensions, multi-tasking, and a call recording system.

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Spruce Health logo

One inbox for every patient conversation.

Spruce Health is the leading platform for HIPAA-compliant healthcare communication.

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Audara logo

AI-Driven Omnichannel Contact Center Platform

Audara unifies voice, chat, video, and WhatsApp in one AI-driven cloud phone system. Includes extensions, WebPhone, call queues, and CRM integration, enhanced with real-time analytics, AI Copilot, and SmartAgents automation.

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Yay logo

Powerful business cloud phone system for easy collaboration

Yay is a cloud-based phone system that combines business messaging, HD VoIP, and a host of call features. It offers instant setup and friendly support.

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Nextiva Contact Center logo

Omni-Channel Customer Relationship Management

Nextiva is transforming the way businesses communicate. Nextiva is a communications platform providing businesses with big-business phone features at a small-business price and it offers ease of use, manageability, scalability, reliability, and enterprise-class functionality.

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SureTel logo

Business VoIP service

SureTel is a cloud-based telephony solution, which helps businesses manage communication across teams & clients through Google integrations, call history, route timing, custom caller ID & more. It lets users record calls to store customer interactions in a unified database for future reference.

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Asterisk logo

Open-source modular communication system

Asterisk is an open-source framework that helps to build communication applications and is used by small, midsize and large companies and governments worldwide

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Voice Clearity logo

Cloud Telephony Solution

Voice Clearity is a cloud telephony solution provider It provides customized solutions per business needs and call volume. It also includes easy integration with leading CRMs.

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RingTree logo

AI-powered virtual small business phone system


AI-enabled business phone system that offers IVR auto-attendant, multiple phone numbers, route calls, manage users and teams, and more.

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Acefone logo

VoIP Phone Service trusted by modern businesses

Bring your company’s communications to the cloud age with Acefone. Be it internal or external communication, working remotely, gaining multi-device access or recording calls, Acefone’s 65+ industry-leading features fulfill all your business communication needs. Start your 14-day FREE trial today.

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StringeeX logo

Omnichannel contact center software

StringeeX is an omni-channel contact center software that helps businesses with ticket management, live chat, customer contact management, and Facebook fanpage management. Teams can maintain a centralized database of customer contact information, including contact, landing page, and events for personalized support.

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PBXPlus logo

Virtual PBX business phone system for growing businesses

Increase your business productivity with PBXPlus virtual PBX software by adding unlimited extensions, call forwarding, setting business hours, integrating with your CRM and many more features.

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KaiCalls logo

A business phone line with a secretary built in.

KaiCalls gives a small business a phone line with a secretary built in. When you can't pick up, Kai answers in your business's name, takes a message and can book appointments. You get the caller's details and a summary by text and email right after the call.

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metricVOICE logo

Cloud Hosted Voice & UCaaS - metricVOICE by Fastmetrics

metricVOICE by Fastmetrics - cloud hosted phones, VoIP & UCaaS. Backed by LIVE USA SUPPORT.

Connect how you work, where you work. The ESSENTIALS plan starts from $15 per month.

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RingRx logo

HIPAA-compliant phone, fax, text, and video for healthcare

RingRx is a HIPAA-compliant phone system designed for modern healthcare providers. It supports healthcare professionals with reliable voice, text, fax, and video communication software. RingRx features enterprise-quality technologies to streamline patient communications, including customizable call routing, easy voicemail access, and secure texting capabilities.

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CircleLoop logo

Cloud based business telephony system

CircleLoop is a cloud-based,self-serviced business telephony software system with native desktop, and mobile apps, boasting features including UK and international number support, personalized voicemail, call transfer, call recording, SMS integration, smart notifications, contact management and more

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Placetel logo

All-in-one - cloud calling, team messaging & online meetings

Placetel + Webex combines business telephony software from the cloud with the full Webex suite. Benefit from over 150 telephone system features paired with video conferences in HD, file and screen sharing, call control, instant messaging, call center functions and unified communication.

Read more about Placetel

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INO CX logo

All-in-One Business Communication Solution

INO CX is a cloud-based omnichannel call center software, which helps businesses aggregate customer interactions from various channels such as voice, SMS, email, chat in a centralized platform.

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Axon Virtual PBX logo

Manage phone calls for your business or call center

Axon is a virtual IP PBX for Windows designed to manage phone calls in a business or call center environment.

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Distrobird logo

All-in-one sales management platform

All the tools your revenue team needs on a single platform, such as lead capture, prospecting, multi-channel engagement, calls, reporting, and more, for free. Double your sales team's output with fewer tools.

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BounceHelp logo

Powerful Callback Widget for Your Website

Cloud-based marketing and customer engagement solution that helps boost and convert website visitors into inbound calls.

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Ubefone logo

La téléphonie cloud d'entreprise, simple et sans engagement.

Ubefone est un standard téléphonique virtuel complet pour entreprises : VoIP, gestion des appels (renvoi, transferts, files d'attente) et ligne mobile intégrée. Opérateur français déclaré ARCEP depuis 2014, données hébergées en France, sans engagement.

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ITC Cloud logo

Business Communication. Simplified.

Step into the future with ITC Cloud! Say goodbye to communication complexities. Collaborate effortlessly from anywhere on any device. Our 24/7 help desk ensures your business success. We're committed to exceeding your expectations. Trust ITC Cloud to take your communication to new heights!

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iPlum logo

VoIP app for calls, secure text & phone tree communication

iPlum is used by busineses in healthcare, financial, sales, customer service, real estate, hospitality and more.
The iPlum provides calls, secure text & phone tree communication. We solve the privacy problem of professionals doing business calling & texting with their smartphone.

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Orbox logo

Creating positive experiences through enhanced communication

Orboxis a fully customizable IP-PBX solution, designed for any type of company that intends to manage their communications.

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