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Business Phone Systems Software for Linux

Last updated: March 2026

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52 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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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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Ultatel Cloud Business Phone System logo

Ultatel Cloud Business Phone System

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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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Zoho Voice logo

Zoho Voice

Cloud-based business phone for SMB sales and support teams

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Zoho Voice is an online business telephony and contact center solution for businesses of all sizes. Packed with powerful features to seamlessly connect with your colleagues and customers, Zoho Voice helps you redefine your customer experience more efficiently with faster business communications.

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LiveAgent logo

TitanHQ and Redstor powered by CyberSentriq

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CyberSentriq unites TitanHQ and Redstor to deliver AI‑driven cybersecurity and data protection for 3,000+ MSPs and 150k SMBs worldwide

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RingEX logo

RingEX - AI meets trusted communications

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So much more than a business phone. Meet the phone system of the future. Set up in minutes and never drop a call again.

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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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Twilio logo

Build, Scale, and Operate Customized Communication Solutions

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Twilio offers an API for phone services enabling companies to make and receive phone calls and send and receive text messages. It allows programmers to integrate various communication methods and to use existing web development skills and codes to solve communication problems.

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Kixie PowerCall logo
Category Leaders

More Connections, Better Conversations. AI-enhanced RevComms

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Kixie is a cutting-edge revenue communications platform designed to supercharge your team’s calling and texting capabilities. Kixie leverages AI and automation to streamline outreach, maximize efficiency, and drive real revenue growth — all while keeping the human element in every conversation.

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Telnyx Suite logo

All-in-one communications platform & API

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Telnyx is an all-in-one communications platform which delivers voice, messaging & IP services for applications & communications companies. Telnyx enables users to integrate, manage & analyze all of their voice & messaging needs with features like elastic SIP trunking, programmable SMS, & more

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Zoom Phone logo

Cloud-based business phone system

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Zoom Phone is a cloud VoIP phone software designed for businesses of all sizes. With a streamlined administration interface and secure voice calls, Zoom Phone offers a flexible solution for remote workforces. It also features global coverage, virtual phone numbers, fixed VoIP, cloud PBX, multi-line phone systems, and a Zoom Phone API, among other functionalities.

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Ooma Office logo

All-in-one VoIP solution for businesses of all sizes.

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Ooma Office is an award-winning and affordable business VoIP solution for any size business. Pricing starts at $19.95/user/month and there are no contracts. We offer two service plans, designed to suit a variety of business needs.

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XCALLY logo
Category Leaders

Omnichannel contact center management

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Our Call Center solution is designed to let you manage at best Agents, Queues, PBX Extensions and more.

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Acefone logo
Category Leaders

VoIP Phone Service trusted by modern businesses

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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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ZIWO logo

API Based cloud contact center software with CRM Integration

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ZIWO is a cloud call center software for sales, marketing, customer support for real or virtual agents. Features include CRM integration, outbound dialer, virtual phone , call tracking, call masking , Agent and Admin Mobile App along with live monitoring of Inbound & Outbound KPI such as IVR, FCR.

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OnSIP logo
Category Leaders

Cloud-based softphone and voicemail platform

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OnSIP is a softphone and private branch exchange (PBX) solution that helps businesses to manage call recording, transfers, monitoring, reporting and more. It allows companies to utilize the desktop or mobile applications to conduct HD video or voice conferences as well as manage voicemails.

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Nextiva Contact Center logo
Category Leaders

Omni-Channel Customer Relationship Management

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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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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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AVOXI logo

Hosted business phone system and call center solution

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AVOXI is a cloud-based global voice and contact center solution that helps enterprises streamline customer service processes. With its interactive voice response (IVR) module, managers can configure the user interface and automatically route incoming calls to specific agents.

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InfoFlo logo

HIPAA compaliant case management software

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HIPAA compliant Case Management software made simple so you can focus on your running your organization all at an affordable price!

Seamlessly manage all your client goals, referrals, documentation, events, classes, and activities within a single platform—eliminating the need for multiple tools.

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VoIPstudio logo

VoIPstudio: the no-hassle VoIP phone service for business

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High-quality VoIP phone service for small and medium-sized businesses. + 40 advanced features: Conferencing, Call Forwarding, Call Recording, IVR, Integrations, etc. Get a number instantly, anywhere in the world, or port your own. Perfect for working from home or team collaboration. 24/7 support.

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Toky logo

Virtual phone system for business sales and customer support

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Virtual phone system that allows you to add call center features to your business including phone numbers, call recordings, CRM integrations, SMS, IVR and more

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Rinkel logo
Category Leaders

Cloud-based telephone solution

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Rinkel is a telephone software for freelancers and small & medium sized companies that can be customized according to company needs. Users can forward their landline to as many mobiles or landlines as they need, put calls on hold, set business hours, set up an IVR menu, record calls and much more.

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VirtualPBX logo

Trusted VoIP for any office, anywhere.

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Get Unlimited Minutes, Text Messaging, and a VoIP Device for $18/mo***** Save up to 80% off business VoIP today!

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Asterisk logo

Open-source modular communication system

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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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