List of the Top 25 Unified Communications Software for Linux in 2025

3CX is a versatile, software-driven IP PBX built on open standards that delivers comprehensive Unified Communications straight out of the box. It caters to businesses of all sizes and across various sectors, offering a full suite of features that range from mobility and presence indicators to sophisticated call center functionalities, all at a significantly reduced cost. This platform is particularly well-suited for remote work environments, featuring mobile applications, video conferencing capabilities, and live chat integration for websites. Installation, management, and maintenance of the PBX are straightforward, allowing users to easily handle it themselves on their own hardware, a dedicated server, or via a cloud environment. Alternatively, users can opt for 3CX's hosting services to simplify their setup even further. With its user-friendly design and extensive feature set, 3CX empowers companies to enhance their communication strategies effectively.

At VirtualPBX, we provide a wide range of communication solutions specifically designed to meet the needs of businesses like yours. Our adaptable business phone plans are not only flexible but also scalable, allowing you to personalize features such as call routing, voicemail, and conferencing to suit your organization's specific requirements. With our contact center solutions, we enable you to significantly improve your customer service and support capabilities through tools like interactive voice response (IVR), call queuing, and real-time monitoring for better decision-making. Furthermore, our business texting service facilitates easy communication with customers and colleagues through SMS, ensuring no message goes unnoticed. If you're contemplating a shift from outdated analog phone systems, our Airdial Pots replacement solutions provide a smooth transition to contemporary, cloud-based options. Overall, VirtualPBX is committed to equipping businesses with essential tools that simplify communication, elevate customer service standards, and boost overall efficiency. We invite you to experience our offerings firsthand by requesting a free demo today, so you can see how we can transform your communication strategies.

Cloudbrink's secure access service significantly enhances both employee productivity and morale. For IT and business executives facing challenges with remote employees due to unreliable network performance, Cloudbrink’s High-Availability as a Service (HAaaS) offers a cutting-edge zero-trust access solution that provides a remarkably fast, in-office-like experience for today’s hybrid workforce, regardless of their location. Unlike conventional ZTNA and VPN options that compromise security for performance, leading to employee frustration and decreased productivity, Cloudbrink’s solution secures user connections while effectively addressing the end-to-end performance challenges that others overlook. The Automated Moving Target Defense security provided by Cloudbrink stands out among other secure access solutions. Recognized by Gartner as the "future of security," Cloudbrink is at the forefront of innovation in this field. By dynamically altering the attack surface, it becomes considerably more difficult for adversaries to target a Cloudbrink user’s connection. This includes rotating certificates every eight hours or less, eliminating fixed Points of Presence (PoPs) by allowing users to connect to three temporary FAST edges, and continually changing the mid-mile path. If you seek the quickest and most secure solution for remote access connectivity, Cloudbrink is undoubtedly the answer you’ve been searching for. With Cloudbrink, you can ensure a seamless experience for your remote teams while maintaining the highest security standards.

Brosix Instant Messenger serves as a valuable resource for organizations seeking to enhance and safeguard their internal communications through secure private networks. This platform equips businesses with all essential tools to boost team productivity effectively. With its user-friendly interface and comprehensive encryption, Brosix enables features like file transfers, screen sharing, as well as both group and private messaging capabilities. By utilizing Brosix IM's private network, companies can foster better collaboration among team members, enhance operational efficiency, protect sensitive data, and ultimately increase productivity. Additionally, businesses can establish their team networks in just minutes, allowing them to quickly benefit from a fully manageable communication system that meets their needs. The ease of setup ensures that teams can focus on their projects without delays.

A Hosted Business Phone System PBX can elevate any organization’s image and operational capabilities to that of a Fortune 500 company. With an auto-attendant in place, incoming calls can be efficiently managed, allowing customers to reach the right person by dialing names, selecting extensions, or choosing departments. Additionally, if you're frequently on the go, your calls can be seamlessly forwarded to your mobile device. T-Max provides complete geo-redundancy, with servers strategically located in premier data centers throughout the United States. We utilize multiple carriers to guarantee optimal connectivity to the PSTN, ensuring that your communication remains uninterrupted. T-Max also offers a selection of high-quality desk phones from renowned manufacturers like Yealink and Polycom, with various models available to perfectly fit your workspace. Our offerings extend to a wide range of devices including reception consoles, agent phones, wireless options, and conference room phones. Discover the best value in Hosted Business Phone Systems available today. Call us at 1-888-245-34883 for more information about our services, which include departments, extensions, digital receptionists, voice prompts, voicemail, fax service, and much more. Our comprehensive solutions are designed to meet the unique needs of your business, ensuring that you stay connected and efficient.

Slack is a cloud-based service designed to improve collaboration on projects and facilitate communication within teams, specifically aiming to promote seamless interactions within businesses. It provides a comprehensive suite of tools and services all in one place, allowing for private channels that foster interaction among smaller groups, direct messaging to quickly convey information to colleagues, and public channels that facilitate conversations among members from various organizations. Compatible with multiple operating systems, including Mac, Windows, Android, and iOS, Slack offers an extensive range of features such as chat functions, file sharing, collaborative environments, instant notifications, two-way audio and video communication, screen sharing, document imaging, and activity tracking, among others. The platform's intuitive interface and diverse integration capabilities contribute to its popularity among teams striving to boost their productivity and enhance communication. Furthermore, users appreciate Slack's ability to streamline workflows and keep everyone connected, making it an essential tool for modern workplaces.

ClickSend provides a comprehensive suite of communication tools including SMS, MMS, Voice, Online Mail, Email, and Fax specifically designed for businesses. Our user-friendly messaging solutions are not only easy to utilize but also feature automation and integration capabilities, making them the choice of many reputable brands, organizations, and developers worldwide. Accessible to everyone, ClickSend can be used through our intuitive Dashboard, mobile application, versatile API, or through over 900 integrations available. Additionally, we offer round-the-clock support and ensure rapid delivery through a secure and dependable platform. With services ranging from SMS marketing and notifications to bulk mail deliveries conducted right from your browser, over 90,000 businesses globally rely on us for their communication needs. Our commitment to a 100% uptime guarantee and ultra-fast direct routes ensures that messaging remains consistent and reliable across all channels. From small enterprises to large corporations, ClickSend facilitates billions of messages across the globe through its extensive network of 232+ direct carrier connections. Furthermore, our pay-as-you-go pricing model allows businesses of any size to effectively manage their communication expenses. This is why ClickSend is the ultimate solution for business communications, streamlining processes and enhancing connectivity.

For over two decades, our cutting-edge technology has been at the forefront of providing telecom services. We specialize in a variety of areas including Hosted IP-PBX, SIP Trunks, Call Center Software, Wholesale, and Data Services, ensuring that our offerings align with the FCC standards for STIR/SHAKEN network compliance with outstanding service, competitive rates, and top-tier products. The XCast Unified Communications system is designed to be both scalable and international, featuring unlimited, complimentary extension-to-extension connectivity across the globe, all managed effortlessly through a web-based Administrator Control Panel (ACP) that simplifies the oversight of your features. We are excited to present our promotional pricing options, which include the Hosted PBX Basic package at just $9.95 per month and the Sip Trunking Basic plan at only $4.95 per month, making it easier than ever to enhance your communication capabilities.

Flock serves as the central hub for your team's communication needs. With features such as team messaging, audio and video calls, along with various productivity applications, it streamlines collaboration. This all-encompassing platform simplifies the way you work, providing everything necessary in one user-friendly tool. Flock's integrated video conferencing capability ensures ongoing connectivity, accommodating up to 20 participants simultaneously. Sharing your screen is effortless, requiring merely a single click. Its advanced search functionality enables quick access to any shared message, file, or link. To enhance project management, Flock offers a comprehensive suite of collaborative tools, including Shared To-Dos, Polls, Reminders, and Note Sharing. With more than 50 integrations available, you can easily connect Flock to other tools like Twitter, Google Drive, and Todoist, all with just one click. This means you can focus on your tasks without the hassle of switching between different applications, significantly boosting your overall productivity. By utilizing Flock, teams can work together more effectively and efficiently than ever before.

PBXware stands out as the original and most prominent IP PBX Professional Open Standards Turnkey Telephony Platform available today. Since its inception in 2004, PBXware has been delivering adaptable, dependable, and scalable Next Generation Communication Systems (NGCS) alongside VoIP solutions tailored for small and medium-sized businesses (SMBs), large enterprises, Internet Telephony Service Providers (ITSPs), call centers, and various governmental agencies across the globe. This achievement is realized by integrating the finest elements of cutting-edge technologies. The Bicom Systems softswitch is offered in several editions, including Business, Call Center, and Multi-Tenant, with each edition designed to support specific features that enhance performance, reliability, and expandability, ensuring users get the most out of their systems. This versatility makes PBXware a preferred choice for organizations seeking robust telephony solutions.

Explore how the Telnyx API serves as an accessible tool for developers, capable of revolutionizing your communication strategies. As a versatile communication platform, Telnyx can be tailored to suit your unique requirements. Our infrastructure has been meticulously designed for optimal real-time communication performance. We offer high-quality voice calls, messaging, and data services that span the globe. With our SMS API, crafting dependable messaging solutions becomes a straightforward process. Implementing two-factor authentication through SMS or voice codes enhances your data security significantly. Setting up your VoIP solution is a hassle-free experience that can be accomplished in just minutes. Benefit from carrier-grade voice quality and flexible SIP trunking options. Additionally, our cloud-agnostic design ensures that you remain safeguarded in the face of any network disruptions. Telnyx empowers you to deploy communication solutions precisely as per your requirements while maintaining reliability and performance. By choosing Telnyx, you are investing in a future-proof communication strategy that adapts to your evolving needs.

VideoMost Server functions as a self-hosted alternative to Zoom, offering a cost-effective video conferencing solution that can be licensed at a lower price compared to major cloud providers. This platform is designed for enterprises, integrating mobile messaging and content-sharing features for enhanced collaboration. With the ability to host up to 300 video participants, VideoMost includes a variety of collaboration tools such as screen sharing, interactive whiteboards, polls, and a mobile messaging service. It ensures secure communication while allowing users to connect from any device or network. Furthermore, VideoMost is compatible with both Scalable Video Coding (SVC) and MUX (MIX) architectures, optimizing video quality based on network conditions and CPU performance throughout the conference. Additionally, it supports complete interoperability with legacy hardware from brands like Cisco and Polycom, as well as Microsoft software such as Outlook, Exchange, and Skype, making it a versatile choice for organizations seeking reliable video communication solutions.

Empower your video capabilities: Create a personalized video platform that integrates various incompatible tools, protocols, and systems. Alternatively, you can seamlessly embed video features in your applications to enhance user experience without interruptions. Securely connect and collaborate: Count on Pexip for your essential communications while retaining full control over your data and meetings to ensure privacy and security. Unify meeting spaces: Access any meeting from any device, improving the video experience for all attendees and upgrading current hardware setups for modern functionality. Enhance customer interactions beyond video: Turn online visitors into scheduled customer meetings effortlessly. Provide a range of meeting formats, including customized branded video sessions for a professional touch. Next-generation Extended Reality (XR) video platform: Increase productivity by utilizing wearables that offer prolonged battery life. Equip professionals in industries such as manufacturing, engineering, construction, and healthcare with innovative tools that revolutionize business processes and operational efficiency.

Our VoIP services are primarily focused on Europe, yet we operate in over 165 countries worldwide. At the core of our offerings is the Premium Plus package, which ensures you receive top-notch quality while enjoying competitive pricing. You can utilize a variety of number types for identification, such as Geographic, National, Toll-Free, UIFN, Mobile VoIP, and Elastic Pool numbers, among others. Additionally, we provide a SoftPhone solution and are excited to soon introduce new Roaming products to enhance your communication experience even further. This commitment to innovation reflects our dedication to meeting diverse customer needs.

The *astTECS IPPBX system serves as the perfect solution for businesses of all sizes, ensuring a comprehensive set of high-end features at a reasonable cost while holding TEC certification from the Government of India. This innovative PBX solution empowers organizations to be adaptable, forward-thinking, and competitive, all while streamlining telecom costs. Additionally, the *astTECS Call Center Dialer stands out as an omnichannel contact center solution, featuring a sophisticated real-time dashboard to monitor agents effectively. With the incorporation of advanced analytics and AI-driven capabilities, this dialer significantly enhances both agent productivity and customer interactions. Furthermore, *astTECS offers a robust call recording solution tailored for your business needs, with an intuitive voice recorder that boasts a range of advanced functionalities. Seamless integration with various PBX systems is a key benefit, as it supports ISDN/PRI, IP, analog lines, and mobile networks, ensuring comprehensive recording of all incoming and outgoing calls. This all-in-one solution not only optimizes communication but also facilitates better decision-making through detailed call insights.

Sococo provides a virtual workspace that enables remote teams to collaborate closely on a daily basis, no matter their geographical locations. This online office environment can enhance productivity levels even more than traditional setups where individuals are physically present in the same building or shared space. By fostering real-time interactions, Sococo helps bridge the gap between remote workers, creating a sense of community and teamwork that might otherwise be lacking.

Monster VoIP was established to offer outstanding voice clarity and ensure maximum uptime for clients across the United States, including major cities like Los Angeles, New York, Washington, D.C., Houston, Dallas, and Chicago. In addition to this commitment, the company prioritizes exceptional customer service and user satisfaction. To achieve geo-redundancy, we have strategically located data centers in Las Vegas, New York, Dallas, Minnesota, and Chicago, with all endpoints registered at each site. This approach guarantees that clients can rely on superior voice quality and reliable business phone uptime from multiple facilities. We have also developed a comprehensive suite of communication tools, allowing teams to familiarize themselves with just one user interface to meet all their communication demands. To uphold our promise of customer satisfaction, we provide tailored setups and continuous support available 24/7/365 for every business VoIP client that engages with us. Our dedication to service excellence is the cornerstone of our operations, ensuring that each customer feels valued and well-supported throughout their journey with us.

UNIVERGE Blue® Cloud Services offers a cohesive and user-friendly unified cloud communications and collaboration experience that brings together people, technology, and communication strategies to support the company's primary goals. The key features include CONNECT (UCaaS), an intuitive and integrated platform designed for enhanced productivity and collaboration; ENGAGE (CCaaS), a secure and customizable Contact Center solution aimed at improving customer interactions; and the EXTEND API, which seamlessly integrates Contact Center and Unified Communications functionalities into daily business applications. Additionally, MEET serves as a powerful meeting tool, offering high-definition audio and video, interactive screen sharing, collaboration features, and advanced A.I. capabilities, while SHARE ensures secure access to the most recent document versions without sacrificing usability. Furthermore, CONNECT BRIDGE allows customers to maximize their investment in NEC phone systems by leveraging cloud-based voice solutions through both desktop and mobile applications. Lastly, the CONNECT+MS TEAMS version is tailored to work alongside Microsoft Teams, further elevating the business communication experience.

The interactions among members of the care team involve a complex web of individuals, technology, hospital systems, and devices. Navigating an extensive flow of information, encountering communication barriers, or facing inefficient processes can complicate your role and adversely affect patient care. Such challenges can hinder your efficiency and ultimately lead to poorer health outcomes for patients. Spok Care Connect® offers a comprehensive solution to these issues. This integrated communication platform enhances collaboration among care teams, facilitates closed-loop communication, and ensures secure messaging, all aimed at optimizing clinical workflows. By utilizing a single communication platform, various challenges across multiple departments and locations within a healthcare system can be effectively addressed, leading to improved operational efficiency and better patient care.

Yeastar CloudPBX (legacy) is an advanced telephone solution tailored for small enterprises, providing a future-proof option for communication needs. With Linkus UC Clients, users can effortlessly engage in remote work and improve call handling across various devices. The hosted deployment eliminates the need for initial hardware investments, significantly reducing management overhead. Yeastar's hosted system is user-friendly and offers a wide range of compatibility features, ensuring that any transitions or upgrades occur smoothly. It's important to remember that the Yeastar P-Series PBX System has replaced the old Yeastar Cloud PBX, bringing along enhanced call center functionalities and integrated communication capabilities for users. This evolution makes it an even more attractive choice for businesses looking to streamline their communication processes.

Discover a reliable and secure solution specifically designed for the needs of your online enterprise. All the essentials you require to launch your business are readily accessible. Benefit from an intuitive control panel that simplifies the management of your website. Our experienced support team is always on hand to provide assistance whenever you need it. Additionally, you will have access to a vast collection of pre-configured web applications that are ideal for enhancing your site. By choosing to collaborate with Sherweb, your trusted partner in the cloud, you will be pleasantly surprised by the opportunities that await. Our all-encompassing cloud management platform is crafted to meet the evolving demands of businesses, empowering IT professionals to leverage adaptable solutions backed by top-notch service from dependable experts. With a strong focus on cloud technology, IT professionals can feel confident knowing that our ever-expanding range of innovative offerings has been meticulously selected and vetted, featuring exclusive proprietary software that cannot be found elsewhere. We deliver a solid and sophisticated platform that seamlessly balances time efficiency with savings on costs. In addition, you can streamline and connect almost any process by utilizing our cutting-edge APIs, which guarantees that your operations are both productive and effective. When you partner with Sherweb, the horizon for your online business is not only bright but also brimming with incredible possibilities for growth and success. Embrace the future and let us help you navigate your journey ahead.

We drive human progress through teamwork, connectivity, and advanced communication technologies. Every aspect of business revolves around people, and when tailored technology enhances human creativity, both individuals and organizations flourish. Teams that excel accomplish greater feats, reach higher goals, and experience increased success. Organizations become more agile, efficient, and adaptable to change. Our team is dedicated to simplifying technology and keeping it affordable. Our passion for our work is evident in how we collaborate with you, starting from our initial discussion and continuing with ongoing support after installation. Serving over 30,000 customer locations across more than 65 countries, we provide clear, secure, and scalable global managed services along with sophisticated collaboration and communication solutions. Let's work together to enhance your human potential and foster innovation. By combining our expertise with your vision, we can create remarkable outcomes.

Introducing an unparalleled UCaaS solution designed to drive the success of Service Providers. This white-label platform is fully customizable, enabling you to set your brand apart and stand out in a competitive marketplace. KAZOO, the comprehensive UC platform by 2600Hz, provides the flexibility required to ensure an exceptional communication experience for your users. Your clients will benefit from seamless and efficient communication with you. With access to over 300 APIs, you can tailor solutions specifically for your clients, enhancing their operational efficiency. Establishing and sustaining brand recognition in the industry is simplified with the ability to white label your offerings. Starting your journey is quicker and more affordable with minimal upfront investments. Your clients will enjoy constant connectivity, backed by reliability and geo-redundancy, allowing them to access their business from anywhere, at any time, through mobile devices. KAZOO's multi-tenant architecture opens up various sales channels, enabling you to choose between engaging resellers, adopting a direct approach, or implementing an agent-based model. This flexibility not only enhances your business potential but also positions you strategically in the evolving communication landscape.

Envision a future where your clients can connect with you effortlessly through various channels. With all modes of communication—such as SMS, chat, messaging, and social media—consolidated into a single user-friendly interface, the complexity of communication is greatly reduced. There are even more exciting features awaiting you, so sign up now to be among the first to experience Flex. Flex by Vonix empowers you to engage through chat, calls, texts, and messages while managing your business profile seamlessly via one mobile application. Every feature of your business phone is now accessible from your mobile device, making it feel just like being in the office. You can easily text or message clients, and even transfer entire conversations thanks to our internal collaboration tools. Ensure everyone stays informed by syncing dialogues with customer records, enhancing your team's efficiency. With access to advanced business calling features, including interactive voice menus and voicemail transcription, customers have the flexibility to reach out through their preferred communication method, ultimately boosting satisfaction and accelerating problem resolution. The future of business communication is here, and it’s designed to keep you connected like never before.

MaxContact is suitable for platforms accommodating anywhere from 6 to over 1000 users. It serves a diverse range of industries, including business process outsourcing and financial services. Many leading companies in these sectors rely on MaxContact as a dependable provider for their needs. This trust underscores MaxContact's reputation in the marketplace, solidifying its position as a key player in various fields.