Top 27 Online Fax Software SaaS Companies in May 2026

Austin, Texas, United States

Upland Software (Nasdaq: UPLD) is a leader in AI-powered knowledge and content management software. Our solutions help enterprises unlock critical knowledge, automate content workflows, and drive measurable ROI—enhancing customer and employee experiences while supporting regulatory compliance. More than 1,100 enterprise customers rely on Upland to solve complex challenges and provide a trusted path for AI adoption.

Los Angeles, California, United States

Consensus Cloud Solutions, Inc. (NASDAQ: CCSI) is a global leader in digital cloud fax technology. With over 25 years of success with eFaxⓇ at its core, the company has evolved to be a trusted provider of interoperability solutions, leveraging artificial intelligence and secure data exchange to transform digital information, automate critical workflows, and maximize operational efficiencies. Consensus maintains industry-leading compliance standards, making it a preferred partner for heavily regulated industries including healthcare, the public sector, financial services, insurance, real estate, and manufacturing. For more information about Consensus, visit consensus.com.

Seattle, Washington, United States

Concord Technologies is a leading provider of secure document exchange, intelligent document processing, and interoperability solutions to healthcare providers, payers, and other highly regulated businesses. For over twenty years, billions of sensitive records containing valuable patient information have been reliably, accurately, and securely sent and received across Concord’s digital health network. Today, the company processes over five billion pages of protected data annually. The company is also recognized for its best-in-class development of new artificial intelligence technologies, including Concord’s Practical AI™ approach to solving the most pervasive administrative challenges in the healthcare industry, and for its industry-leading applications that help its customers grow and manage their business.

Seattle, Washington, United States

Provider of IP fax services intended to make technological advancements in Cloud Fax services. The company's advanced network architecture provides unmatched high-availability, virtually unlimited capacity and industry leading reliability and its service is fully compliant with common government and industry regulations by providing complete encryption and data security and also offers fax online email-to-fax and fax-to-email system, which facilitate documents to be sent and received from computer or mobile device, enabling users to send and receive faxes from existing production software applications.