Compare the Top Telephony Software for Linux as of April 2026 - Page 2

  • 1
    Asterisk

    Asterisk

    Sangoma Technologies

    Asterisk is an open source framework for building communications applications. Asterisk turns an ordinary computer into a communications server. Asterisk powers IP PBX systems, VoIP gateways, conference servers and other custom solutions. It is used by small businesses, large businesses, call centers, carriers and government agencies, worldwide. Asterisk is free and open source. Asterisk is sponsored by Sangoma. Today, there are more than one million Asterisk-based communications systems in use, in more than 170 countries. Asterisk is used by almost the entire Fortune 1000 list of customers. Most often deployed by system integrators and developers, Asterisk can become the basis for a complete business phone system, or used to enhance or extend an existing system, or to bridge a gap between systems. Build your own custom system with Asterisk? Buy a powerful, low-cost turnkey system based on Asterisk? Discover which option is right for you.
    Starting Price: Free
  • 2
    HoduPBX

    HoduPBX

    Hodusoft

    HoduPBX is the ultimate solution for business communication. Its unprecedented user interface with optimal user experience facilitates businesses to communicate with the end users efficiently. This software offers world-class connectivity within an office and from the remote location leaves communication an uninterrupted process. Get HoduPBX and empower agents’ work management with multitasking abilities and efficiencies. With 1000+ concurrent calls and 10,000 extensions, our IP PBX software is one of the best choices for business communications. Here are HoduPBX’s key features: Multi-Tenant Auto Provisioning Least Call Routing (LCR) Real-time Analytics and Reports Queue Monitoring Multi-level IVR BLF & Presence Prepaid & Postpaid Billing Payment Gateway Integration Audio-conferencing SMS Hosted IP PBX Software
  • 3
    Cradle

    Cradle

    Cradle

    With Cradle, you can now talk to your customers like humans. Cradle isn't just a standard phone system (although it does the standard stuff) our features are changing the way businesses communicate with customers. You have lots of data on your customers, but how often do you and your team have the right data when you need it? With our HubSpot integration, you can capture all call activities in HubSpot. Bringing reporting from non-digital media into the spectrum, you get the full picture of your marketing ROI. Keep your sales team in HubSpot, as well as their phone activity, to focus their time on the highest value tasks and ensure they're delivering value for your business. With our three-step onboarding, we make it easy for you to get started so you can begin talking to your customers quickly!
    Starting Price: $14.99 per month
  • 4
    NOLA AUTOMATION

    NOLA AUTOMATION

    NOLA AUTOMATION

    The NOLA Automation Software all in one allows your business strategy to gather momentum in the most efficient manner. With the help of our software, you would not only be able to create schedule campaigns broadcast, In-outbound call, in-outbound predictive, SMS 2 WAY, voice drop, and email and many more, you also get the chance of emailing a link to the prospect that would redirect them to their accounts with the help of an online portal.. much, much more...
    Starting Price: $30/user
  • 5
    MaxContact

    MaxContact

    MaxContact

    MaxContact is suitable for sites from 6 – 1000+ users, with clients around the world in all sectors including BPO’s, financial services, utility providers and many more. MaxContact is a proven supplier to some of the market leaders in these fields.
    Starting Price: £49 per month per User
  • 6
    CompletePBX 5 IP PBX
    Virtual IP PBX (Private Branch Exchange) or Phone System Appliance – CompletePBX is the heart of Xorcom hardware and software phone systems. Built on top of the solid Linux and Asterisk platforms, it’s built for stability and performance. CompletePBX was designed from the ground up to combine ease of use, advanced features and security at every level. Download free, fully functional CompletePBX 5 VM – evaluation virtual machine now! Check out our FREE online certification training course that will take you step by step through all the basics of CompletePBX system. Save a lot of time and effort by trying to go at it alone. Let us help you get there faster.
  • 7
    FusionPBX

    FusionPBX

    FusionPBX

    FusionPBX can be used as a highly available single or domain-based multi-tenant PBX, carrier-grade switch, call center server, fax server, voip server, voicemail server, conference server, voice application server, appliance framework and more. FreeSWITCH™ is a highly scalable, multi-threaded, multi-platform communication platform. It provides unlimited extensions, voicemail-to-email, music on hold, call parking, call center, call queues, phone provisioning and many other features. It provides the functionality your business needs and brings corporate-level phone system features to small, medium and large businesses. A large amount of time has been used to fix bugs and tighten security and improve the code. There is also progress being made on the future release. We have made a good amount of progress and the master branch is far ahead of the current release in many ways. We are working diligently to finish the last changes that we feel are needed for this coming release.
    Starting Price: $100 per month
  • 8
    pascom ONE

    pascom ONE

    pascom GmbH

    pascom ONE is a cloud-based, all-in-one phone system solution that is designed to help companies upgrade their business communications by combining all your voice, chat, video and virtual fax into a single solution. pascom's Desktop and Softphone apps ensure that no matter where you work, in the office, in Home Office or on the go, you can stay connected with colleagues and customers from anywhere. By providing unified access to all your contacts, chats, team messaging and web meeting channels, pascom ONE is more than just a cloud phone system, it is the heart beat of all your essential everyday business communications.
    Starting Price: €8.90/concurrent user/month
  • 9
    Vodia PBX

    Vodia PBX

    Vodia Networks

    Vodia Networks offers a SIP PBX platform that runs smoothly across cloud, on-premise, and hybrid setups. Our PBX supports a broad range of devices, including SIP phones, softphones, and WebRTC clients, to help businesses communicate flexibly across locations. Our Session Border Controller (SBC) has been certified by Microsoft for Microsoft Teams, and our PBX features AI-powered real-time call transcription using OpenAI’s Whisper technology. Vodia supports easy deployment through prepaid cloud PBX instances and traditional installations across various environments. Our phone system integrates with some of the world’s best business software, including ActiveCampaign, CallSmart, Cliniko, HighLevel, Microsoft Dynamics 365, monday.com, Shiji PMS, UPilot, and other industry-standard business communications platforms, so our customers can deploy cutting-edge business tools alongside our best-in-class, feature-rich cloud phone system.
  • 10
    Taridium ipbx
    The Taridium ipbx is a highly capable software VoIP PBX system that replaces a traditional hardware based PBX. ipbx runs on standard server hardware, or in the cloud and does not require any additional software licenses. An End User Panel that let’s you control all aspects of your own extension, such as managing your call via an operator console, listen to voicemail, configure call forwarding, create ad-hoc telephone conferences and much more. Configure your extension to only forward during certain times, using your iCalendar feed or based on a list of favourite caller IDs. A meet-me type conference room for each and every user. No more scheduling conflicts and live conference management, which allows you to mute and kick participants. Invite users with the click of a button and have the system call them instead of having to provide cumbersome login instructions.
    Starting Price: $199 one-time payment
  • 11
    GAO Research

    GAO Research

    GAO Research

    GAO Research Inc. is your software solution provider for embedded modem software, fax modem software, speech codecs, and telephony software for electronics equipment, telecommunications and semiconductors for embedded engineering. GAO offers VoIP & FoIP solutions, V.92 and V.90 with any fallback softmodems required, Super G3 & G3 and standard fax software, and speech & video codecs – all of this on the industry's broadest range of DSPs and microprocessors. In addition to superior software, GAO provides unparalleled technical support, extensive platform expertise, and state-of-the-art testing facilities. GAO offers systems designers and engineers a complete VoIP packaged solution, which includes modules for fax and data over IP. This reduces development time and time to market. The typical components of an IP Telephony System are User Interface, Voice Processing, Network Protocols, Network Management, and System Services.
  • 12
    Softdial Contact Center
    Softdial Contact Center™ (SCC) is Sytel’s flagship suite of feature-rich contact center applications and services, currently driving 50,000+ users in 50+ countries.​ Maximize agent productivity, with high-performance predictive dialing, and a tailored omnichannel desktop allowing work on several open text sessions at once.​ As a platform, SCC is uniquely flexible, allowing users to either run the full suite or choose which modules to deploy. It can be extended via SCC’s comprehensive, robust APIs, modified, adapted and even white-labeled to fit any business requirements​. SCC manages communication on all media channels – voice, chat, email, messaging – automatically blending and load balancing contact sessions between all agents, all queues and campaigns with its Automatic Session Distributor (ASD®).
  • 13
    FreeSWITCH

    FreeSWITCH

    FreeSWITCH

    Everything you need to know to dive into the FreeSWITCH platform. FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a versatile software implementation that runs on any commodity hardware. From a Raspberry PI to a multi-core server, FreeSWITCH can unlock the telecommunications potential of any device. Combined with our hosted cloud platform, SignalWire, FreeSWITCH can interconnect with the outside world and scale to any size. The Pre-built virtual machine has both a written and video how-to to help you get started. All you need is a copy of virtualbox and you can be off and running in minutes. If you are an experienced developer you can also follow the instructions below to compile the FreeSWITCH platform from source among other manual installation options. If you already have a spare Debian instance handy, you can follow the link below to get detailed instructions on how to get our packages installed.
  • 14
    sipXcom

    sipXcom

    sipXcom

    sipXcom was established in January of 2015 from a fork in the sipXecs project by the development team at eZuce, Inc. sipXecs and SIPfoundry in particular had become a user community and was not seeing any growth in the developer community. Due to a restrictive contributor agreement, sipXcom is without any restrictive contribution rights. sipXcom source code licensing is based on the copyleft-friendly AGLP v3 (Affero General Public License). SWARM is the code name for the next generation of sipXcom/sipXecs projects. Under development with anticipated production readiness scheduled for early 2017, SWARM will be a microservices-based architecture that will improve upon sipX scalability, reliability and configurability. The software is designed to support any compute platform whether you want to use dedicated, virtual, or cloud-based servers. You can also create hybrid implementations with a combination of premise-based and data center or cloud instances.
  • 15
    R.E. Communications IP-PBX Premise based
    R.E. Communications offers an Asterisk based IP-PBX system. These systems support all industry standard SIP phones, with enterprise level features that go from 1 phone to 4000 phones. These systems also support SIP trunking which with the combination of SIP trunks and SIP phones you can replicate the services of a Hosted solution but save on the per seat cost. Typically a 10 phone/seat system can be supported with 4 to 6 SIP trunks which is a savings over the 10 seat cost of a Hosted solution.
  • 16
    CallWatchPro
    7twenty's CallWatchPro creates an organizational customer oriented culture. Designed for organizations that handle service and sales calls without a formal call center, Call Watch Pro boosts the level of customer service and satisfaction utilizing minimal managerial resources. Monitoring all customer-facing personnel according to updated KPIs and providing real time insights, Call Watch pro enables managerial staff to constantly improve customer service and internal communications. As result, the number of recurring conversations dramatically decreases, while organizational and financial efficiency increases.
  • 17
    Momentum Telecom
    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
  • 18
    astTECS

    astTECS

    *astTECS

    *astTECS provides complete enterprise telecom products based on Open Source Technology- such as IP PBX and Contact Center Solution. *astTECS IP PBX offers all the high-end features at an affordable price enabling your business to be future-ready, flexible, innovative and competitive while reducing your telecom expenses. *astTECS IP PBX can seamlessly integrate with any applications - CRM, ERP, PMS and even with your existing telecom infrastructure. *astTECS call center solution has advanced features with a real-time agent monitoring dashboard helps to improve your agent productivity and customer engagement with advanced analytics. *astTECS also offers a complete call recording solution for your business with real time dashboards.