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Telephony Software for Linux

Last updated: February 2026

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101 software options

CloudTalk logo

CloudTalk

Cloud-based call center software for sales and support teams

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

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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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Talkdesk logo
Category Leaders

Cloud-based contact center & customer experience platform

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Benefit from comprehensive call center software functionality from inside Zendesk, Salesforce and Desk.com with the Talkdesk CTI Widget.

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RingEX logo

RingEX - AI meets trusted communications

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Designed to give you a flexible, mobile, and powerful cloud phone system. Experience HD-quality web, audio, and video, along with one-click functionality and webinar capabilities with RingCentral Video. Promote collaboration with team messaging, unlimited SMS, and more.

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Bitrix24 logo

All in one business management workspace

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Bitrix24 #1 business phone system and CRM in one. Inbound and outbound calls, IVR, telemarketing, robocalling, voice mail, call recording, call routing, domestic and international phone number rental. Used by over 12 million businesses worldwide!

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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

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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3CX logo

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

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3CX is a phone system that handles call queues, built-in video calls, and web conferencing. It integrates website live chat, Facebook & text messages all in one system. The open-platform is fully compatible with popular IP phones & SIP trunks.

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VICIdial logo

Open source call center software with predictive dialer

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VICIdial is an open source call center solution with outbound predictive dialing and features for handling inbound or manual calls as well as email and web chat

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CXone Mpower logo

Cloud-based contact center software

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For organizations around the globe, NICE provides customer experience (CX) solutions that increase customer satisfaction, boost operational efficiency, and strengthen brand value.

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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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Five9 logo

Cloud contact and call center software

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Five9 is an all-in-one cloud contact center solution for inbound, outbound, blended and omnichannel contact centers world-wide. Powered by Practical AI, Five9 enables agents to provide customer experiences across phone, email, chat, mobile, social and 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 a simple to use, cloud-based voice + video solution. With a platform designed to enable your team to advance collaboration and productivity, Ooma Office gives you the ultimate flexibility to work from anywhere with video meetings, desktop, and mobile apps.

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XCALLY logo

Omnichannel contact center management

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Let your Agents handle inbound and outbound calls through our web platform (WebRTC) or our softphone.
Supervisors can easily manage Agents, Queues, PBX Extensions, Dial plans, IVR projects and more thanks to the XCALLY user-friendly web interface, with several realtime dashboards and panels.

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Genesys Cloud CX logo

AI-enabled experience orchestration platform

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Genesys Cloud CX cloud contact centre lets you differentiate faster, adapt easier, and architect better with an all-in-one composable modern architecture

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Acefone logo

VoIP Phone Service trusted by modern businesses

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Acefone is a VoIP telephony provider trusted by 10,000+ reputed companies. Experience HD customer interactions and uninterrupted collaboration with agile telephony solutions such as virtual numbers, IVR, click-to-call, outbound calling, etc. Special offer: Unlimited calling at just $12.99/user/month

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Bright Pattern logo

Cloud Contact Center Software with Embedded AI

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Leading global provider of AI-powered omnichannel cloud contact center software.

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LoopUp logo

Premium remote meeting solution

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LoopUp is a premium remote meetings solution for better, more productive conference calls. By combining audio reliability with a simple user experience and powerful collaboration features, LoopUp provides a world-class conferencing solution that your users and guests will love.

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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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wolkvox logo

Communication management system for contact centers

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Configure SIP trunks and customize phone lines to connect via voice to your customers all around the world.

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Nextiva Contact Center logo

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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Dialshree logo

Cloud-based contact center solution

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DialShree is a cloud-based software designed to help businesses manage customer interactions. It can be deployed on any web server or cloud platform and can be used to manage interactions across multiple channels.

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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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