List of the Top 25 Free Telephony Software 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.

Kixie: Intelligent Calling and Texting Solutions for Revenue Teams Kixie serves as an AI-driven sales engagement platform designed to enable teams to connect more swiftly, secure additional deals, and grow seamlessly—all while maintaining a personal touch. 🔥 Outbound Sales: Elevate connection rates by as much as 400% through AI-enhanced Local Presence, Multi-Line PowerDialer, and Spam Risk Prevention. 🚀 Marketing: Streamline calls and texts for immediate follow-ups and impactful outreach—all without the hassle of manual processes. 📞 Inbound Sales & Customer Service: Manage a higher volume of calls with intelligent CRM-based routing, shared SMS inboxes, and instant auto-responses. 📊 Revenue Operations & Leadership: Access AI-generated insights, real-time coaching resources, and sophisticated analytics to enhance your team's performance. 💥 Transform your sales force today! Explore our website to begin your journey for free, with no credit card necessary, and discover the difference Kixie can make.

Experience seamless communication with a free app that combines global phone numbers, customer chat, and team collaboration. You can obtain a local number from virtually any country or city, enhancing trust with visitors to your website, which can potentially boost sales. If you utilize our chat feature on your site, you can secure this service at no cost; otherwise, subscriptions begin at just $1.79 per month. Incoming calls can be answered for free through our innovative apps or redirected anywhere in the world for the same price as a local call. By supporting globalization and entrepreneurship, we aim to contribute positively to the world by equipping business owners in distant regions with tools that bridge gaps and create equality. Currently, around 160,000 out of the 170 countries that joined have transitioned to paying customers, showcasing the demand for effective communication solutions worldwide. Our mission is to continue fostering connections that empower individuals and businesses alike.

WhatsApp provides a fast, user-friendly, secure, and free messaging platform that is available on mobile devices worldwide. Tailored specifically for small business owners, WhatsApp Business can be downloaded without any charges, enabling users to create product and service catalogs. Additionally, this platform offers features that enhance customer interaction by automating responses, organizing messages, and allowing for swift replies. Beyond small businesses, WhatsApp also supports medium and large enterprises in managing customer service and sending essential notifications. For more information regarding the WhatsApp Business API, you can check their official site. Prioritizing user privacy, WhatsApp incorporates end-to-end encryption in its latest app versions, ensuring that your private conversations stay confidential. This level of security guarantees that only you and the person you're communicating with can view your messages and calls, preventing access by anyone else, including WhatsApp. Such a commitment to safeguarding your privacy reinforces the importance of secure connections in our increasingly digital world. As users continue to rely on messaging apps, the focus on security and privacy will likely remain a key concern for both individuals and businesses alike.

Zadarma provides a business phone solution that eliminates the need for extensive wiring or complex hardware setups. Their services include VoIP, Cloud PBX, CRM functionalities, and website widgets, along with seamless integration with leading CRM platforms. Additionally, virtual phone numbers can be obtained in 100 different countries worldwide, starting at just $2 each month, making it an affordable option for businesses of all sizes. This flexibility allows companies to streamline their communication processes while maintaining a global presence.

Stay organized, focused, and connected with a phone solution that is intuitive and suits organizations of all sizes. With Voice, handling work-related calls becomes a simple task. You can effortlessly make and receive calls from any device using a specific work number, regardless of your whereabouts. Start improving your communication practices now. Voice is flexible, enabling you to customize it to fit your daily responsibilities smoothly. The processes for number assignment, porting, and billing are simplified through the easy-to-use G Suite Admin console. Leveraging Google's advanced AI technology, spam calls are filtered out, voicemails are automatically transcribed, and you have the ability to personalize your PBX settings. Furthermore, integrations with Hangouts Meet and Calendar ensure that your attention remains on what truly matters. Voice can be quickly implemented on a global scale, minimizing the necessity for administrative tasks. Focus on your key priorities while effortlessly maintaining connectivity through desk phones, smartphones, and web applications, thus enhancing your work efficiency. Embrace this innovative solution to transform how your organization communicates and collaborates.

We effortlessly identify the best phone line for connecting your calls. Our continuous evaluation of call traffic guarantees that you benefit from the most competitive pricing available. With the cutting-edge Red Box, we customize your experience to suit your unique preferences and calling habits. International calling is made easier, reliable, and cost-effective, all while taking your personal calling patterns into account. Start your adventure with Rebtel to access affordable international calls through our intuitive app, which is designed to be quick and simple. Rebtel allows you to link any phone to another, regardless of your location in the world. Our innovative system improves your international calling experience by leveraging local phone lines, ensuring both savings and outstanding call quality. By directing your calls through local lines, you eliminate the necessity of an internet connection and the anxiety of dropped calls. This setup allows you to enjoy the advantages of low international rates while experiencing the clarity and dependability of a local call. Additionally, our service enables you to maintain connections with friends and family worldwide without straining your budget, making it easier than ever to stay in touch. With Rebtel, you can truly experience seamless communication on a global scale.

DID Global provides top-notch, efficient premium IP telephony solutions designed for both business and personal use, enabling rapid scalability and significant savings on advertising expenses while driving sales growth. Our clients benefit from competitive pricing, as we adhere to the principle that "price reflects quality." By choosing local operators, you can reduce your advertising costs by up to 60%, and utilizing a prestigious local number fosters greater trust among your clients. We prioritize high-quality and reliable communication channels, ensuring that if you experience a connection loss, you can quickly switch to an alternate provider thanks to our channel redundancy. This guarantees seamless communication with your customers, allowing your business to operate without interruptions. Furthermore, we proudly extend our exceptional services to clients across more than 150 countries. Our commitment to quality and customer satisfaction sets us apart in the competitive telephony market.

WeChat serves as a multifunctional platform for communication, enabling users to effortlessly send messages and share multimedia content with friends and family, regardless of where they are situated. The app allows you to easily find and connect with others by entering their WeChat ID or phone number, and as soon as your request is accepted, you can start chatting without delay. Through the Moments feature, users can share their favorite experiences via photos and videos while staying updated on their friends' posts. Additionally, WeChat facilitates real-time interactions with its instant voice and video calling options, accommodating both individual and group chats. If expressing your emotions through words proves challenging, a fun sticker can add a light-hearted touch to your conversations. The diverse Sticker Gallery, featuring creations from talented artists around the globe, provides a plethora of free stickers for you to download and use, enhancing the enjoyment of your exchanges. Discover and select your preferred stickers today to make your interactions even more lively! Furthermore, WeChat regularly rolls out new features, ensuring that its user experience remains fresh and exciting. Through these continuous updates, the platform not only meets the evolving needs of its users but also fosters deeper connections among them.

InstaVoice is transforming the voice communication landscape with its cutting-edge mobile services offered to carriers across 46 countries worldwide. Developed through a unique fusion of creativity and expertise by the original pioneers of Voice SMS, the InstaVoice app is designed to provide a reliable and powerful voicemail experience for users everywhere. Enjoy the ease of accessing, responding to, and managing an unlimited number of voicemails through a user-friendly chat-like interface. Say farewell to annoying ‘Your-voicemail-is-full’ alerts, as unlimited storage allows you to access all your past voicemails, no matter if you switch carriers. Moreover, you will appreciate the free Missed Call Alerts linked to each of your numbers, even when your phone is turned off or out of reach. All your missed calls will be systematically organized in the “Missed Calls” section, enabling you to return calls or respond effortlessly with a voice or text message within the app. With InstaVoice, maintaining your connections and managing your communications has reached unparalleled levels of convenience. Embrace this innovative service and enjoy seamless communication like never before.

Enjoy the convenience of messaging whenever and wherever you desire! With LINE, you can easily send both one-on-one and group messages to your friends worldwide, as it supports a wide range of smartphone platforms including iPhone, Android, Windows Phone, BlackBerry, and Nokia, and is also available on your computer. You can make unlimited voice and video calls to those you care about without any financial concerns, since LINE facilitates free international communication, helping you maintain connections no matter how far apart you are. This platform works seamlessly on devices such as iPhones, iPads, Android smartphones, Windows Phones, Windows PCs, and Macs, and it provides LINE Lite for Android users who prefer a lighter version. Unleash your creativity with over 10,000 unique stickers and emoticons, and be sure to check out the Sticker Shop for exclusive designs featuring beloved characters and celebrities. Furthermore, LINE NEWS stands out as the top news curation service in Asia, focused on delivering content that enriches your everyday life. For those who are busy or wish to avoid crowded environments, accessing medical consultations from the comfort of your home is incredibly convenient. All these features come together to make LINE an indispensable resource for communication, information, and personal well-being. Ultimately, LINE not only enhances the way you connect with others but also enriches your overall lifestyle.

VitalPBX is a comprehensive PBX platform built on Asterisk and designed to operate on Centos 7. This powerful and adaptable platform enables users to effortlessly manage their PBX systems with ease. With an intuitive user interface complemented by helpful tooltips, navigating through the system is straightforward. It is essential for telephony systems to remain vigilant about potential security vulnerabilities and implement measures to mitigate these risks. VitalPBX provides multiple layers of defense to safeguard against cyber threats in the realm of VoIP communications. Moreover, its security features ensure that users can maintain a reliable and secure communication environment.

MyOperator stands as the foremost Call + WhatsApp platform in India, serving over 15,000 businesses such as NCERT, Amazon, Lenskart, Apollo, and Myntra. What makes MyOperator stand out? The platform provides a diverse array of solutions designed to enhance communication and efficiency, which include integrated Call + WhatsApp capabilities, a Cloud Contact Center, Office IVR, toll-free numbers, a Campaign Management suite, a Multi-store Solution, the WhatsApp Business API, and sophisticated integrations. ✅ More than 15,000 brands utilize Call + WhatsApp to connect with their customers effectively. ✅ The MyOperator platform has overseen over 2.5 billion conversations. ✅ It boasts high ratings on platforms like Google, G2, and Capterra. ✅ With a 99.9% uptime guarantee and multi-geographic redundancy, reliability is ensured. ✅ Service automation can be achieved through the use of Voice and WhatsApp bots. ✅ Businesses can create intelligent WhatsApp campaigns and automations to enhance customer engagement. ✅ It also supports customer service operations through a VoIP-ready Contact Center that integrates with WhatsApp, ensuring seamless communication. In a rapidly evolving digital landscape, MyOperator continues to innovate to meet the needs of businesses and their customers alike.

Bria serves as a versatile softphone that enhances the functionality of your call server, PBX, or VoIP service, allowing you to receive calls seamlessly on both your desktop and mobile devices. With CounterPath's features, you can engage in team messaging, HD video conferencing, and screen sharing, all from a single platform. The audio quality is exceptional, providing crystal clear sound and 1080p video calls, whether you're in the office or on the move. Managing your calls is straightforward with user-friendly options for call recording, music-on-hold, and transferring calls. If you're seeking additional collaboration tools, Bria Enterprise and Bria Teams include enhanced functionalities such as team messaging and screen sharing, accommodating up to 200 participants. This all-in-one app allows you to communicate, collaborate, and share effortlessly across various devices, ensuring that your calling and messaging history is synchronized, so you remain informed at all times. To explore more about these features, you can visit counterpath.com for additional details.

Freshcaller is a cost-effective cloud-based solution that enables businesses to establish connections with their clientele. With the capability to provide phone numbers in over 90 nations, Freshcaller allows users to effortlessly create a contact center in just a few straightforward steps. The software integrates smoothly with a variety of CRM and Helpdesk platforms, facilitating collaboration between sales and support teams. Administrators can access real-time insights regarding customer interactions and agent performance through robust reporting and analytics features. Agents have the flexibility to take calls on their desktops or laptops, whether they are using Android or iOS devices, thereby fostering a completely connected yet remote contact center environment. Additionally, administrators can easily add agent licenses, purchase extra numbers, top up call credits, and enhance their pricing plan as needed. Renowned for its modern and dependable service, Freshcaller is trusted by over 7,000 clients around the globe, making it a popular choice for businesses seeking efficient communication solutions.

PopTox enables users to make free VoIP calls from their computers or smartphones using only WiFi or an internet connection. It can be accessed through any standard web browser, which means that there's no need to download apps or install plugins, providing a hassle-free experience without any charges. To start your first free call, just enter the phone number you wish to reach and click on the “Call” button. This web-based calling service makes online communication incredibly simple and convenient. As long as you have a modern browser, such as Chrome, you can easily make calls without needing any additional software. When you land on the PopTox homepage, you will find a user-friendly dialpad; simply choose your destination country from the dropdown list and input the number, omitting the country code. This easy-to-follow procedure ensures that anyone can connect effortlessly, breaking down barriers to communication. Additionally, PopTox offers a reliable option for those who need to stay in touch with friends and family around the globe without incurring high costs.

Welcome to TENIOS, the cloud communications provider under the Apifonica Group umbrella. Based in Germany, TENIOS focuses on innovative AI voicebots and telephony solutions designed for businesses. Their succinct mission is to deliver Conversational AI to the global market. Driven by a passion for automation, a dedicated team of specialists in Cloud Technology, Telephony, and AI collaborates to enhance business communication and streamline related workflows. TENIOS Voicebots efficiently manage both outbound and inbound calls, follow up with leads, pre-qualify them, update CRM data in real-time, and generate reports to enhance customer communication strategies. Their all-encompassing telecom platform provides a variety of services, including virtual phone numbers, smart call routing, interactive voice response (IVR) systems, SMS, RCS, and a powerful Voice API for the smooth integration of voice applications. With more than twenty years of industry experience and hosting services based in Germany, TENIOS guarantees dependable and scalable communication solutions that are customized to accommodate a wide array of business requirements. Additionally, their commitment to innovation positions them as a leader in the evolving landscape of cloud communications.

Easily send out large volumes of text messages, automated calls, and emails to your entire list of contacts in just a matter of moments. Start your adventure today by registering for a free account! Our mass notification system allows you to make automated calls to a specific list of phone numbers in mere seconds. We streamline the creation, scheduling, and delivery of your automated calls, ensuring that all your contacts receive them at the same time. Quickly and effortlessly broadcast mass text messages to a vast array of phone numbers using our notification platform. DialMyCalls offers both long code and short code options for text messaging, enabling you to engage with your audience immediately! Our free bulk email service allows recipients to either listen to your recorded message or read your text through email. By incorporating email addresses into your contact database, you’ll be all set to distribute your mass notifications! Additionally, DialMyCalls' mass notification service can be accessed on your favorite mobile device, allowing you to download the app and send notifications from practically anywhere, keeping you connected while on the move. With this flexibility, you can ensure that important messages reach your audience without delay.

Create a specific work phone number, organize your contacts efficiently, and enhance your business presence with the advanced texting features provided by Sideline Pro. This service guarantees that your professional communications—calls, messages, and voicemails—are all routed through a distinct number, protecting your personal line from disruptions. Be promptly notified when clients get in touch, automate your responses, and expertly manage each correspondence. Research indicates that a significant 90% of consumers favor texting over phone calls when interacting with businesses, and Sideline ensures you have all the tools needed for effective communication. Obtain a dedicated line for voice calls, text messages, voicemails, and more, while keeping a clear distinction between your work and personal contacts, all easily manageable from one device. In the event that you miss a call, the system sends an instant text to the customer, allowing you to establish contact before they seek other options. Take advantage of bulk messaging capabilities to initiate text marketing campaigns, promotional offers, or special deals. Furthermore, you can set up text reminders through your work calendar to reduce the likelihood of missing appointments and meetings, thereby boosting your operational effectiveness. By implementing these techniques, you not only enhance customer interaction but also cultivate deeper connections with your audience, ultimately leading to increased business success. Embracing these strategies will position your business to thrive in a competitive environment.

The word "Free" in FreePBX embodies the concept of Freedom, underscoring that FreePBX is the foremost open-source IP PBX solution worldwide, which enables users to design a tailored phone system that aligns with their unique needs. Delve into the possibilities of open-source communication and investigate the wide array of features offered by FreePBX that assist in building your perfect phone system. By incorporating commercial modules from Sangoma and a variety of other enhancements, you can transform your FreePBX setup into a robust Unified Communications platform. Remember to consult the Knowledge Base on the FreePBX Wiki for further information! Alternatively, seeking support from FreePBX experts can aid you with installation, updates, troubleshooting, and additional services. FreePBX is accessible for free download and usage, and its strength is bolstered by a global community of developers committed to ensuring its high compatibility and flexibility, which guarantees it encompasses all necessary functionalities required to establish a scalable business phone system for any budget. This community-driven approach not only promotes innovation but also ensures ongoing advancements, solidifying FreePBX as a dependable option for diverse communication requirements. With its extensive resources and community support, users can continually enhance their experience and capabilities.

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.

CheckMyNumber provides assistance by: - Enabling the parsing, formatting, and validation of phone numbers from every country and region globally within Salesforce. - Identifying the category of a phone number based on its characteristics, with the capability to differentiate between Fixed-line, Mobile, Toll-free, Premium Rate, Shared Cost, VoIP, Personal Numbers, UAN, Pager, and Voicemail when possible. - Assessing the likelihood that two different numbers may actually refer to the same entity. - This tool streamlines communication processes by ensuring accurate phone number management across various platforms.

TekSIP for Windows functions both as a SIP Registrar and a SIP Proxy, accommodating various transport protocols including UDP and TCP for both IPv4 and IPv6, as well as TLS and WebSocket, with only the commercial versions offering support for Secure WebSocket and TLS. It has been verified to operate on Microsoft Windows Vista, 7, 8, 10, and 11 servers, serving as a signaling service for SIP-based phones utilizing WebRTC technology. In addition, TekSIP adheres to several RFC standards, including RFC 3261, RFC 3263, RFC 3581, RFC 3891, RFC 3311, and RFC 3481, enabling NAT traversal and ENUM functionality. Users are able to select the listening IP address and alternative SIP endpoints for outgoing calls, while session details can be logged for review alongside real-time monitoring of registrations and active sessions. The Windows Performance Monitor (Perfmon.exe) facilitates tracking of active sessions and registrations, enhancing oversight. Furthermore, in cases where the intended endpoint is unavailable—whether due to being offline or busy—TekSIP redirects calls to an alternate endpoint, ensuring seamless communication. Additionally, the graphical user interface (GUI) provides users the capability to terminate any active SIP session easily.

Are you in search of a cost-effective and dependable phone system for your business? Imagine having the ability to focus more on your customers rather than spending time on hold with your service provider for every minor adjustment. FluentStream is the solution you need! Our dedication lies in offering the finest business communication platform available. We offer no-contract options for every account, along with round-the-clock client support. Our team will assist you throughout the onboarding experience, recognizing the challenges that can come with setting up a phone system. We're more than willing to handle the complex tasks so you can focus on what matters most. This commitment to ease and support is what makes working with us a seamless experience. With FluentStream, you can enjoy peace of mind knowing we prioritize your business's communication needs.

Asterisk is a dynamic open-source framework that facilitates the development of a variety of communication applications. It enables a standard computer to function as a powerful communications server. Asterisk is integral to IP PBX systems, VoIP gateways, conference servers, and many other customized solutions. Its user base includes small businesses, large corporations, call centers, telecom operators, and government entities around the world. Provided free of charge, Asterisk is backed by Sangoma's support. Currently, there are over a million Asterisk-powered communication systems in operation across more than 170 countries. Notably, virtually all companies within the Fortune 1000 list leverage Asterisk in some form. Frequently adopted by system integrators and developers, Asterisk can serve as the basis for a complete business phone system or be used to enhance an existing setup or link various systems. Whether you aim to design a bespoke system using Asterisk or are interested in acquiring an effective and affordable turnkey solution, there are numerous options to explore that can help you find the perfect match for your requirements. As it adapts to technological advancements and user needs, Asterisk remains a key player in the evolving landscape of modern communication solutions. Its ongoing development ensures users continue to benefit from innovative features and improved performance.