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Top 27 Online Fax Software SaaS Companies in May 2026

As of May 2026, there are 27 SaaS companies in Online Fax Software. They have combined revenues of $281.8M and employ 2.7K people. They have raised $44.3M and serve 659K customers combined.

Online Fax Software provides a modern solution for sending and receiving faxes over the internet, bypassing traditional phone lines and physical fax machines. This software is commonly utilized in industries that require secure document transmission, including healthcare, finance, and legal sectors. Users can typically send faxes via an email interface or a web application, improving efficiency and accessibility while reducing reliance on outdated technology. Key features of online fax software often include customizable templates, secure storage and transmission options, document tracking, and compliance with relevant regulations like HIPAA for healthcare. Typical user personas include administrative professionals, compliance officers, and IT personnel who seek reliable and secure methods for handling sensitive documents. By integrating digital workflows, online fax solutions help streamline processes and enhance productivity in various business environments.

Companies
27
Revenue
$281.8M
Funding
$44.3M
Employees
2.7K

Filters

Sorting: Highest -> Lowest

Filters

Top Online Fax Software Companies

Showing 10 of 27 companies ranked by annual revenue.

1
Upland Software

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.

Revenue
$93.3M
Customers
450K
Year founded
2010
Funding
$31.4M
Team size
848
Growth
-66.06%
2
Consensus Cloud Solutions

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.

Revenue
$51.9M
Customers
-
Year founded
1995
Funding
-
Team size
472
Growth
-
3
concord.net

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.

Revenue
$49.6M
Customers
-
Year founded
1996
Funding
-
Team size
451
Growth
-
4
Concord Technologies

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.

Revenue
$30.4M
Customers
200K
Year founded
1996
Funding
-
Team size
426
Growth
132.43%
5
ClickSend

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

Revenue
$9.4M
Customers
-
Year founded
2013
Funding
-
Team size
85
Growth
-
6
Municorn

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.

Revenue
$8.2M
Customers
-
Year founded
2016
Funding
-
Team size
59
Growth
-
7
Documo

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.

Revenue
$5.4M
Customers
-
Year founded
2014
Funding
-
Team size
49
Growth
-
8
Equisys

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.

Revenue
$5.1M
Customers
-
Year founded
1987
Funding
-
Team size
46
Growth
-
9
iFax™

San Francisco, California, United States

iFax is a leading healthtech platform that provides HIPAA-compliant, secure document transfer and digital cloud faxing solutions to millions of businesses and healthcare organisations.

Revenue
$3.6M
Customers
-
Year founded
2008
Funding
-
Team size
33
Growth
-
10
Alohi

Plan-les-Ouates, Geneva, Switzerland

Alohi streamlines communications and systems of agreements for startups, businesses and enterprises. Sign.Plus: Legally binding online signatures Fax.Plus: Online fax service Scan.Plus: AI mobile scanner

Revenue
$3.4M
Customers
-
Year founded
-
Funding
-
Team size
31
Growth
-

Inclusion Criteria

- The product must allow users to send and receive faxes electronically via the internet. - It should include features for document tracking and confirmation of receipt. - The service must comply with industry regulations relevant to data protection and privacy, such as HIPAA or GDPR. - Integration capabilities with existing software systems (e.g., email, document storage) are essential. - The solution should offer encryption for data security. - Not just a basic email-to-fax service; it must also provide advanced features like API support or analytics for users.