Top 42 VoIP Providers SaaS Companies With $1M–$5M Revenue (August 2026)

Nicosia, Cy, Cyprus

3CX is a software development company that owns and operates the website 3cx.com. The company offers a software-based phone system that provides communication solutions for businesses of all sizes. Founded in 2005, 3CX is headquartered in Cyprus and has offices in the USA, UK, Germany, Russia, Japan, South Africa, Australia, and Hong Kong. The company's phone system software allows users to make and receive calls via VoIP, as well as providing video conferencing, live chat, and other collaboration features. 3CX has over 50,000 customers worldwide and is known for its ease of use, scalability, and affordable pricing.

Hongkong, Hong Kong, Hong Kong

eztalks is an all-in-one online engagement platform for effortless and cost-effective communication through text messaging, fax, and phone calls with customers and partners. At eztalks, we provide businesses with top-notch communication services, including SMS messaging, faxing, and phone calls. Our platform is designed to make these services simple, efficient, and cost-effective. Our SMS messaging service lets you quickly send text messages to your customers and partners, keeping them informed and up-to-date. With our easy-to-use platform, you can send messages to individuals or groups with just a few clicks. Our faxing service lets you send and receive important documents quickly and securely. Our platform is compatible with a wide range of file formats, making sending documents from your computer, smartphone, or tablet easy. Our phone call service is designed to be both reliable and affordable. With eztalks, you can make phone calls to anyone, anywhere in the world, at a low cost. Our platform also offers various calling features, such as call recording and forwarding, to meet your unique needs. At eztalks, we understand that communication is critical to the success of any business. That's why we offer comprehensive services to help you stay connected with your customers and partners. Our platform is easy to use and backed by experts who can always assist you with any questions or concerns. Experience the convenience and reliability of eztalks' SMS messaging, faxing, and phone call services today. Sign up for our platform and start communicating with ease and efficiency.

Los Angeles, California, United States

sms & email automation

Kağıthane, İstanbul, Turkey

Tegsoft is a Contact Center solution both running as on-prem and cloud SaaS, that offers omnichannel customer experience management over communication channels such as phone calls, web chat, email, messaging apps, social media, text, fax. With its integrated CRM structure, it enables you to know your customer and provide a truly customized customer experience. Tegsoft is handling more than 1 million calls per day at over 450 customers with more than 15,000 Agents in 15 countries with 25-language support. It was founded in 2008 by entrepreneurs who have over ten years of experience in software development, telecommunication sector and running international projects. Tegsoft Contact Center solution is a Web-based application which allows companies to interact with their customers via different communication channels such as Voice, E-mail, SMS, Web chat and Social Media. It allows users to manage all these communication channels from a single user-friendly interface. Tegsoft has been preferred by many different companies operating in various sectors, especially in the Finance sector. From the very beginning, Tegsoft has been focused on product development and R&D activities to disseminate the innovative features in the industry. Certified Partners offer Pre-Sales, Sales and After-Sales services. Accredited Trainers of Tegsoft Academy deliver product training.

Encinitas, California, United States

For over 15 years, Telcentris Inc. has been an innovator in 5G-AI cloud-based communication solutions. Through its VOXOX and CloudPhone brands, it has become a leading CPaaS solutions provider that delivers innovative, secure, and customer-centric communication solutions. As a unified communications and telecommunications solution for carriers, enterprises, and consumers, Telcentris offers VOIP, hosted virtual PBX telephone system, data, service delivery platform services, and newly released, SNARF (a Smart Anti Robocall Filter) needed by all carriers that must comply with the FCC. Telcentris conducts business in San Diego, California and delivers globally.

Taguig City, National Capital Region, Philippines

We offer end-to-end Unified Communication Solutions for Call Centers, Banks, other financial institutions, and enterprises. Our Voice Solutions, Strong domain expertise, and extensive technology skills enable our clients to increase their profitability and reduce their operational expenses. Lgorithm constantly aims to drive technology to the next level with robust, scalable & agile systems and systems, creating infinite feature rich on premise & cloud applications at the least possible price. Our product components like Predictive Dialer, Automatic call distributor (ACD), voice logger enables our clients to manage their quality Center in most economical price with various commercial model like monthly rental, purchase and rent to own modes. Our end-to-end services are a unique blend of technology and services, which allows our customer to manage their business easily and effectively.

London, England, United Kingdom

Business phone system leader in Europe. Today Zadarma has over 2 million of active users in 160 countries, cloud backup system in 5 data centers on different continents, connection with major global telecom operators, constantly growing range of services, 24/7 support in 7 languages. Open a virtual office anywhere in the world in 5 minutes!

BLUE BELL, Pennsylvania, United States

Full-featured and flexible hosted-voice solution built on an enterprise-class cloud-based unified communications (UCaaS) platform that allows clients control over their communications

Guarapuava, Parana, Brazil

Developer and provider of cloud based services for the call centers. The company provides services for the call center industry like browser-based services for SMB contact centers and PBX services for SMB companies.

Lagos, Nigeria

Termii is Twilio for Africa.