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Open Source Business Phone Systems Software (2026)

Last updated: April 2026

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149 software options

3CX logo

3CX

Web & mobile-based (Android, iOS) communications system.

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3CX is a Business Phone System offering telephony, video & live chat, in one easy-to-use integrated solution. Suitable for any business size or industry, 3CX is open-standards supporting a variety of IP phones & SIP trunk providers. Ideal for remote working, with free mobile apps for iOS & Android.

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Dialpad logo

Dialpad

Cloud communications system for enterprise businesses

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Dialpad is a cloud communication platform and business phone system that provides organizations with the latest in VoIP telephony technology to keep teams connected and productive. The platform comprises three integrated products; Dialpad Connect, Dialpad Support, and Dialpad Sell.

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Intulse logo

Intulse

VoIP business phone system for organizations of all sizes

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Intulse is a cloud-based VoIP service designed to help organizations streamline processes for inbound and outbound communications by providing phone solutions. Key features of managed VoIP include team collaboration, call queue management, conference calling, voicemail, number porting & reporting.

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SendMyCall logo

SendMyCall

(0)

The better, faster answer

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SendMyCall is a business phone system for SMBs, which provides features such as advanced call forwarding, automated greetings, voicemail, conference calls, fax, and touchtone menus.

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Quo logo

Quo

The collaborative phone system trusted by 90k+ teams

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Quo is the collaborative phone system trusted by teams at over 90,000 businesses.

It brings your customer calls, texts, and contacts into an intuitive, AI-powered app that works across all your devices. Built for teams who never want to miss a call.

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Ultatel Cloud Business Phone System logo

Ultatel Cloud Business Phone System

ULTATEL | Phone and Teleommunication Solutions For Business

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ULTATEL is a leading and innovating provider of cloud-based telecommunications. We help your business unify voice, chat, and video in a single user-friendly platform.

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Phone.com logo

Phone.com

Communicate Better

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Phone.com is the modern, work-from-anywhere solution for today’s agile, mobile, and always-on entrepreneurs and growing businesses. Phone.com delivers award-winning U.S. based customer support to more than 30,000 customers across America.

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CloudTalk logo

CloudTalk

Cloud-based call center software for sales and support teams

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CloudTalk is a VoIP phone system built for modern businesses. Make things easier for your sales and customer support teams with 70+ advanced features and easy-to-setup integrations with your existing business software. It’s the perfect phone system for mid-sized businesses. Try a FREE 14-day trial.

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Audara logo

AI-Driven Omnichannel Contact Center Platform

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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

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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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PBXPlus logo

Virtual PBX business phone system for growing businesses

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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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metricVOICE logo

Cloud Hosted Voice & UCaaS - metricVOICE by Fastmetrics

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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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UniTalk logo

Business phone system for small to large businesses

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UniTalk is an IP telephony solution for businesses. It offers features like quick setup, international phone numbers, call recording, IVR, SMS services, and integration with CRM systems and analytics.

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StringeeX logo

Omnichannel contact center software

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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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Yeastar Cloud PBX logo

Digital Value, Delivered.

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Run your business phone system on the cloud with secure calling, unified communications, and centralized management.

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RingRx logo

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

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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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55PBX logo

Virtual PBX solution to boost your team's productivity

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55PBX is a Brazilian based Business Communications Platforms with Voip, Whatsapp, SMS and integrations with Support, Sales, Ecommerce that facilitates your team's communication with their customers.

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SureTel logo

Business VoIP service

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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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Clear Ring logo

Clarity with every call.

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Optimise your marketing strategy with Clear Ring's advanced call, form, and live chat tracking tools. Our platform offers real-time reporting and multi-channel attribution in a user-friendly interface. Discover the Clear Ring difference and enhance your marketing with our data-driven insights.

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Broadcaster Mobile logo

Connect the world with your company.

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Broadcaster Mobile is a cloud-based customer communication management solution that helps streamline communication with customers via mass and personalized SMS, RCS, email, and voice messages. The platform also has the option to send mass messages through different communication channels, allowing businesses to reach a large number of customers quickly and efficiently.

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iPlum logo

VoIP app for calls, secure text & phone tree communication

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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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TalkChief logo

TalkChief: Your Modern Business Phone

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TalkChief Business Phone System offers a comprehensive operational platform, allowing you to establish teams, add members, and configure inbound and outbound flows based on skill or time.

Allocate Dynamic, Fixed, or Random DID numbers to connect with potential prospects based on their location.

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MAXvoice logo

Communication tool that connects teams via voice calling

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MAXvoice is a cloud-based communication platform that lets businesses use voice calling and group chat to connect with customers, partners, vendors, support resources, and co-workers across multiple locations.

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Diabolocom logo

Cloud software for call centers & customer service.

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Diabolocom is a European leader in cloud-based software services for call centers and customer service.
With fast deployment, compelling ease of use, secure cloud hosted in Europe, premium call quality and native CRM integration, easily increase customer loyalty and boost sales.

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Global Call Forwarding logo

The most trusted provider of business phone numbers.

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Global Call Forwarding provides international toll-free numbers, local phone numbers, and enterprise voice solutions from most of the countries around the world.

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