Top 4 Online Fax Software Companies With $5M–$10M Revenue (September 2026)

Melbourne, Victoria, Australia

ClickSend is communications software for businesses and developers. We offer SMS, MMS, Voice, Online Mail, Email and Fax — to help you talk to the people who matter. We’re powered by our talented team of 100+ people who work in Australia, The Philippines, England, America, Vietnam and beyond. Our tools are used by some of the most trusted brands, organisations and developers globally. Because they’re simple to use, automate and integrate. ClickSend offers helpful 24/7 support, and lightning-fast delivery via a secure and reliable platform. Our customers send messages via our Dashboard, mobile app, flexible API or integrations. From small business to enterprise, ClickSend powers billions of messages around the world with 232+ direct carrier connections. Plus, ClickSend is always pay-as-you-go. That’s why ClickSend is business communications, solved. ClickSend is proudly part of Sinch, the Customer Communications Cloud. For more details, visit: Website: www.clicksend.com or open a free account here: https://clicksend.com/signup

Nicosia, Nicosia, Cyprus

Municorn is a company that provides multiple telecom solutions, including mobile apps for various communication needs and eSIM solutions, helping businesses and individuals manage their telecom services efficiently.

Wilmington, Delaware, United States

Secure and reliable enterprise HIPAA-compliant cloud fax, API, document interoperability, workflow management solution, SOC2 certified, Sarbanes Oxley Compliant. Documo and the entire family of Documo products are designed for organizations handling highly sensitive information and operating in regulated environments. Documo has a number of built-in security features to keep your data safe and help keep your organization regulatory compliant. Optimize your workflow. Our products facilitate paperless document workflow. Your relationship with documents will become easier, more secure, and more efficient than ever before. Scalable reliability. Secure & encrypted. Extensive API documentation. Complimentary onboarding support. Explore our fully-featured cloud fax API. Integrate the most secure and reliable HIPAA-compliant cloud fax solution with any EMR, EHR, ERP tool, or directly into your own software. We offer extensive API documentation in Ruby, NodeJS, Python, PHP, & CURL. Documo's developer-friendly API makes integrating fax functionality into your business software simple and seamless. Our robust network infrastructure delivers unparalleled fax reliability your users will love. A FMC is a type of ATA (analog telephone adapter) used to connect your analog fax machine to your internet service. Without any need to maintain an analog phone line exclusively for your fax machines, a fax ATA saves you money. And with all your documents being sent over Documo’s secure Priority Delivery Network, you can rest assured your private documents are regulation-compliant and reliably delivered. The most modern, intuitive, and user-friendly online fax platform you’ll ever use. It’s no wonder we’ve got dozens of 5-star reviews on G2 Documo is a suite of document workflow software built to make documents easy, more secure, and friendly towards our planet. Our tools can help you improve efficiency, cut paper waste, and close security gaps found in traditional paper-based processes.

London, United Kingdom

Equisys produce Zetadocs: AP automation, expense management and document management solutions for Microsoft Dynamics 365 Business Central (with expense management available for other finance systems too). We also provide fax software for PCs and web-based project management solutions to help organizations automate manual processes to save time and money. Our software products are designed for small and mid-market businesses, and for departmental use at multinational companies. They stand out from the competition by being simple to install and manage, reliable and great value – backed by outstanding service and support.