Best Business VoIP Providers for Linux

VirtualPBX stands as an acclaimed Business Phone System Provider, renowned for its award-winning services. Offering industry-leading features, boasting 99.999% reliability, and competitive pricing, VirtualPBX equips businesses with top-tier communication tools for seamless unified communications. Catering to a diverse range of enterprises, from entrepreneurs to contact centers seeking a complete contact center solution. VirtualPBX serves as the ultimate destination for modern business VoIP needs. With plans starting at just $18 per month, VirtualPBX ensures accessibility and excellence in communication solutions. Get a free demo today!

The First and Still the Best in VoIP Communication! Our proprietary technology has been providing telecom services for over 20 years. XCast’s broad suite of products—Hosted IP-PBX, SIP Trunking, Carrier Services and Call Center Solutions—are available directly from XCastLabs or through our white label Resellers, our agent partners, carriers or call centers. XCast exceptional service, rates, and products meet the FCC standards for STIR/SHAKEN network compliance. XCast’s Hosted PBX solution is delivered over the Internet to any of your connected devices. Promotional plans start as low as $9.95 per month and include FREE Outbound minutes and a FREE Yealink Business Phone per extension. Sip Trunk Plans begin at $4.95 w/unlimited inbound minutes and free installation. Our Automatic Call Distribution (ACD) system has full reporting, automated customer callback, custom prompts, music on-hold, call recording, call monitoring (with whisper and barge-in), call transfer and more!

Thirdlane is a scalable UCaaS platform that blends multi-tenant PBX, Contact Center, and collaboration apps into one solution. MSPs, Enterprises, and telecom providers adopt Thirdlane when they want freedom of deployment, deep integrations, and reliable control over their communications stack. Whether your team prefers cloud-hosted services or on-premises deployments, Thirdlane adapts to your strategy. IT departments appreciate the API-first design, while business leaders value the ability to cut costs and avoid lock-in. Core benefits: - Enterprise-grade PBX with calling, video meetings, voicemail, and advanced routing. - Unified Thirdlane Connect apps for chat, video meetings, and file sharing. - Built-in Contact Center - Advanced analytics to improve service and sales. - CRM integration for context-rich customer interactions. - White-label branding across all user touchpoints. - Options for geo-redundancy and high availability.

Powerful Cloud Telephony for Global Businesses Zadarma offers a feature-rich VoIP platform designed for businesses that want flexibility, scalability, and professional communication without high costs. Set up your cloud PBX in minutes, manage international teams, and serve customers worldwide — all from a single interface. Key features: - Virtual phone numbers in 110+ countries - Free cloud PBX with IVR, call routing, and analytics - Integration with CRMs: HubSpot, Zoho, Bitrix24, and more - AI Voice Agent and AI-speech recognition and analytics - Apps for desktop, mobile, and browser-based calling - AI-powered voice agents and call tracking - Full control via web interface and API Ideal for remote teams, support centers, and growing companies looking to modernize their phone systems.

See how the developer friendly Telnyx API can transform your business communications. Telnyx is an all-in-one communication platform designed to be tailored exactly to your needs. We created our network with real-time communications in mind so we can deliver quality calls, messaging, and data around the world. Easily build reliable messaging with our SMS API. Keep your data safe by setting up two-factor authentication using SMS or voice codes. Plug and play your VoIP setup in minutes and get carrier-grade voice with elastic SIP trunks. Our cloud-agnostic approach means you can rest easy knowing you are protecting in case of a network failure. With Telnyx deploy communications exactly to specifications.

net2phone provides innovative and affordable cloud based telephony software and services to both small and mid-sized businesses and large or multinational enterprises. Our Unified Communications and Contact Center solutions provide advanced features that can be customized to suit your unique business needs while ensuring simplicity through implementation and use. net2phone’s compelling​ ​UCaaS offer combines voice, video, chat, and messaging under one platform, includes advanced features and integrations, and unlimited calling to over forty popular destination countries. uContact, net2phone’s omnichannel CCaaS solution, streamlines all voice and digital interactions​, ​enabling contact centers to meet customers in the digital channel of their choice​ and ​integrating all touchpoints into a Unified Inbox. Other flagship solutions include SIP Trunking services, native integration with Microsoft Teams, and international connectivity capabilities.

AI-powered phone system with built-in contact center, predictive dialers global numbers – loved by retail & e-commerce teams. The modern cloud phone system built for retail, e-commerce, and growing teams. Get unlimited calling, local/toll-free numbers in 90+ countries, AI receptionist (24/7 auto-answer & lead qualification), predictive/progressive/preview dialers, shared team inbox, SMS marketing, WhatsApp, live chat, call recording, AI transcription, and 100+ CRM integrations (HubSpot, Salesforce, Shopify, Zoho, Zapier & more). Perfect for stores, support teams, sales outreach, and multi-location businesses. No contracts, pay-as-you-grow pricing Instant setup, port your number for free Trusted by 17,500+ companies worldwide 24/7 human support

VoIPstudio is a cloud-based business telephone system created for organizations that require professional communications features without the hassle and expense of owning and managing on-site PBX equipment. With thousands of systems installed worldwide, VoIPstudio is the first choice for companies when selecting a VoIP solution. Its power and simplicity make VoIPstudio perfect for any business, from startups to mid-sized call centers. With VoIPstudio, you get an all-in-one business VoIP solution with no contracts and no hidden costs, available at consumer-level pricing. All our clients get all our features from day one, including a virtual switchboard, virtual numbers, conference calling, call center, call recording, and much more. VoIPstudio also includes advanced communication tools like videoconferencing, screen sharing, or integration with lots of CRMs and other business tools. VoIPstudio is a global company that serves more than 15 million minutes of daily talk time to

VoIP Office, a leading provider of Cloud based communications, makes it affordable and easy to connect to anyone, anywhere in the world. Our communications solutions meet the needs of any type of business in any industry, from home offices to large enterprises. VOIP OFFICE is a new-generation cloud based communications provider that offers all the features of your traditional PBX along with the latest functionality enabled by the use of VoIP technology. VoIP Office integrates easily with your business applications, seamlessly integrating your desktop and your office into one interconnected system.

A secure and reliable solution for your online business. Everything you need to get started. A user-friendly control panel to manage your website. Experienced support technicians. Access to a huge library of pre-configured web apps for your website. With Sherweb as your trusted cloud partner, you’ll be surprised by what you can achieve. Our full-fledged cloud management platform, driven by evolving business needs, empowers IT professionals to leverage agile solutions paired with 5-star service by trusted experts they can count on. We’re born in the cloud – IT folks rest easy knowing our ever-expanding portfolio of innovative products has been hand-picked and pre-vetted, including a selection of proprietary software you won’t find anywhere else. We bring you a mature, powerful platform that doesn’t make you choose between saving time and saving costs. Automate and integrate just about anything, leveraging our cutting-edge APIs. 

From startups to enterprises, companies worldwide rely on Telzio for mission-critical phone services. Easy to deploy, manage, and scale. Telzio Call Flows will have you up and running with a complete business phone system in 5 minutes. Our interface gives you complete control so you don't have to call a tech to make a change to your phone system. It's so easy, you can do it yourself. Expect great customer service from our team, dedicated specialists who know your account, and fast response times you can count on.

A powerful feature-packed Cloud phone system to help your business thrive. Flexible, scalable and compatible with the devices you already use, Yay.com offers a communication solution that combines a host of of professional features with lightning fast set-up and ease of use. Built from the ground up to support businesses around the world, wherever they're based. Connect teams and collaborate across borders in minutes with a dynamic phone system that lets your teams work the way they want to. Deliver improved caller satisfaction through a range of business features such as CRM integrations, call queuing, IVR call menus and more. Get started with a free trial and discover how our phone system can seamlessly enhance your business and help you reduce your business costs today.

Imagine if your customers could seamlessly communicate with your business how they want to. Calling, SMS, messaging, social, and chat all unified in one interface with one goal: simplifying communication. You’ll want to see what we have in store. With Vonix, you’ll be able to call, text, social message and chat using your business profile from one mobile app. You’ll access all your business phone features as if you were in the office, using your business number from your cell phone. Text or message your customers, and transfer whole conversations with the internal collaboration features. Sync conversations into your customer records and keep everyone in the loop. Access business calling features like interactive voice menus, day/night mode, voicemail transcription & more. Improve satisfaction and get faster resolutions by enabling customers to communicate via their preferred method.

Companion or replacement for your desk phone! Already have modern phones? Bring them with you! You can connect any compatible device to your virtual phone system, with no restrictions. Sign up for pricing and features, and stay for service and support! The only cloud business phone service to publish this level of reliability! You have control, add what you need when you need it! Volume discounts and automatic pricing tiers are available! Everything your business needs the inclusive modern phone system! Industry-leading technology + the highest certification possible! We take care of security, updates and upgrades, for free! How you and your customers communicate matters. We'll teach you! Feeling abducted by something new and different? We'll be right here to help! Can your phones and fax pass an audit today? We've done all the work, so you don't have to! Using the world's most advanced speech-to-text technology our service instantly transcribes voicemails and sends them to your email.

Unified Office, Inc. is a leading Managed Services Provider of Business Class Communications Services to Small and Medium-sized Businesses. Unified Office is a provider of fully managed business VoIP services, integrating a quality and support program that starts with a prospect engagement, through a site survey, network and call quality assessment process, and extends all the way through the integration, testing, deployment and support lifecycle. Around the clock, we proactively monitor all end-to-end service assets (on-premise, private/public cloud, hardware, software, quality, availability), using specially developed diagnostic tools. Our commitment to supporting our business customers and resellers is paramount. Internet of Things (IoT) solutions have generally been marketed to and purchased by large enterprises. There are huManaged VoIP services provider Unified Office has extended its year-old Internet of Things (IoT) operational performance service.

We unleash human momentum with collaboration, connectivity, and communications technology. All business is human—and when custom technology empowers human ingenuity, people and companies thrive. High performing teams do more, achieve more, and win more. Companies become agile, efficient, and resilient. Our team takes pride in making technology easy and cost effective. We love what we do—and it shows in the way we partner with you, from our first conversation to ongoing post-install support. Working with over 30,000 customer locations in 65+ countries, we deliver straightforward, secure, and scalable global managed services and advanced collaboration and communications solutions. Together let’s build your human momentum. More at gomomentum.com