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Top Rated Business Phone Systems Software with Linux

Last updated: July 2026

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15 software options

3CX logo

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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Ultatel Cloud Business Phone System logo

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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NUACOM logo

All-in-one Cloud Phone System for SMBs

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NUACOM offers an all-in-one Cloud phone system for SMBs that need a modern, fully scalable business communication solution. The platform offers over 50 business-class features to help boost productivity, connect departments, and centralize telephony for all 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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RingTree logo

AI-powered virtual small business phone system

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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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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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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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Ubefone logo

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

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Ubefone est un opérateur de téléphonie cloud, VoIP et mobile pour entreprises, déclaré ARCEP depuis 2014. Standard téléphonique virtuel, appels illimités, sans engagement, données hébergées en France.

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ITC Cloud logo

Business Communication. Simplified.

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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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Bitrix24 logo

All in one business management workspace

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Bitrix24 is a cloud PBX business phone system, call center and CRM in one! Trusted by 12 million businesses it's available in cloud and on-premises. Inbound, outbound, SMS, multilevel IVR, call routing and more.

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TeamsPhony logo
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Migrate your business telephony to Teams

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TeamsPhony is an enterprise VoIP telephony solution, directly integrated into Teams.

You can handle all your business calls with your Microsoft Teams application.

Our infrastructure is certified by Microsoft to guarantee optimal service quality and reliability.

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Radius Connect logo
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Cloud-based telephony & business communication solution

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Radius Connect enhances business communication with ease. The cloud-based telephony solution offers flexibility, affordability, and simplicity. It effectively lowers call expenses, enhances call quality, and ensures the business is future-ready.

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CommandLink SD-WAN logo
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Network mamagement platform

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CommandLink SD-WAN delivers seamless multi-wan connectivity for all locations, integrating security and improving cloud application performance. The UTM/NGFW integration offers direct access to the internet for every location, avoiding high latency traffic through carrier gateways.

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CalLite CRM logo
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CRM software for managing marketing activities

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CalLite CRM helps businesses manage various sales-related activities such as outbound (telemarketing, teleselling), inbound/help desk, uploading practices, contracts, PDA, pyramid/multilevel sales networks, appointment making, surveys/data collection, multi-channel messaging (outgoing and incoming), reporting, and business intelligence.

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