Faxing may seem like a legacy communication method to some, but it continues to play a pivotal role in industries that require secure, official document transmission. Open-source fax server software has emerged as a key solution for businesses looking to streamline fax operations while maintaining flexibility, security, and cost-efficiency. In 2025, a range of advanced open-source fax solutions are available, each offering unique features designed to meet modern business demands. This article delves into the top 5 open-source fax server software solutions in 2025, with a focus on their key capabilities and use cases.

Why Choose Open Source Fax Server Software in 2025?

As businesses continue to seek digital transformation, faxing remains an essential tool, especially in sectors like healthcare, legal, and finance. Open-source fax server software has gained prominence due to its flexibility, cost-effectiveness, and ability to be customized to meet specific business needs. Here’s why open-source fax software is an appealing choice for modern organizations:

• Cost Savings: Open-source solutions eliminate the need for expensive proprietary fax systems, offering businesses the opportunity to implement faxing without high licensing fees.
• Customization: Open-source software can be tailored to fit the unique requirements of different industries, making it ideal for businesses with specific faxing needs.
• Scalability: Most open-source fax server solutions are scalable, ensuring that businesses can expand their faxing capabilities as their needs grow.
• Security and Compliance: Open-source fax software allows organizations to implement the necessary security measures and compliance protocols (e.g., HIPAA) to protect sensitive data.

Given these advantages, let’s explore the best open-source fax server solutions in 2025 that offer these features and more.

Key Considerations When Choosing an Open Source Fax Server:

Before diving into the list of top open-source fax server software, it is important to understand the key features businesses should look for when selecting a fax server solution:

1. Multi-Tenant Capabilities: A multi-tenant solution allows businesses to manage multiple users or clients from a single instance of the software. This is particularly useful for service providers and large enterprises.
2. Security Features: Ensure the fax server offers encryption, HIPAA compliance, and other security protocols to protect sensitive communications.
3. Integration Options: Open-source fax software should integrate seamlessly with existing communication systems, such as VoIP platforms, CRM systems, or email clients.
4. Ease of Use: The software should have an intuitive user interface to streamline the fax management process and reduce the learning curve for users.
5. Scalability: Choose a fax server solution that can grow with your business and handle increasing fax traffic without compromising performance.

1. ICTFax: The Ultimate Multi-Tenant Open Source Fax Server Software Solution

ICTFax is widely regarded as one of the top open-source multi-tenant fax server software solutions for businesses in 2025. With its robust multi-tenant architecture, ICTFax allows businesses to manage multiple clients and users under one system, making it a preferred choice for service providers and large enterprises.

Key Features of ICTFax:

• Multi-Tenant Architecture: Enables businesses to create isolated accounts for multiple users or clients, making it ideal for managed service providers or organizations with multiple departments.
• Enhanced Security: Built-in HIPAA compliance, multi-factor authentication (MFA), and SSL encryption ensure secure fax transmission, safeguarding sensitive data.
• Email and Web Interface Integration: Seamlessly send and receive faxes via email or web interface, ensuring accessibility and ease of use.
• Scalability: The software is designed to grow with the business, offering easy expansion as faxing requirements increase.
• Print2Fax Support: Send faxes directly from any Windows application, offering additional flexibility for users.

ICTFax is a powerful choice for businesses requiring a secure, multi-functional, and scalable fax solution. Its ability to scale with growing organizations and provide comprehensive security features makes it one of the best open-source fax servers in 2025.

2. ICTBroadcast : An Integrated Unified Communications Platform with Fax Server Capabilities

ICTBroadcast is a unified communications platform that features fax broadcasting capabilities alongside other communication services like auto-dialing and VoIP. This makes it an ideal choice for businesses that need more than just a fax server but a comprehensive communication solution.

Key Features of ICTBroadcast Fax Server Integration:

• Unified Communications: Combine voice, fax, and email into a single platform, simplifying communication and improving workflow efficiency.
• Automated Faxing: Automate fax sending and receiving processes, reducing manual intervention and saving time.
• Scalability and Flexibility: ICTBroadcast supports scalable deployments, making it suitable for small businesses as well as large enterprises.
• Integrated Reporting: Track fax usage, delivery success, and performance through detailed reports, giving businesses valuable insights into their fax operations.

For businesses looking for an all-in-one solution, ICTBroadcast integrates fax functionality with other communication tools, providing a seamless and efficient experience.

3. OpenFax : A Simple Yet Powerful Open Source Fax Server Solution

For businesses seeking a lightweight, easy-to-deploy fax server, OpenFax offers a streamlined open-source solution with essential features for managing fax communications. While it may not have the advanced capabilities of larger solutions like ICTFax, OpenFax is perfect for small businesses that need a reliable fax system.

Key Features of OpenFax:

• Easy Installation and Setup: OpenFax offers a quick installation process, making it easy for small businesses to implement without requiring complex configurations.
• Web Interface: OpenFax provides a simple and intuitive web interface, allowing users to manage fax communications from anywhere with internet access.
• Fax to Email: Faxes are delivered directly to the recipient’s email inbox, eliminating the need for physical fax machines.
• Basic Security Features: OpenFax includes basic security measures, including encryption for fax transmissions and email integration.
• Integration with Third-Party Tools: OpenFax supports integrations with various business tools, including CRM systems and email clients.

OpenFax is a perfect solution for businesses with minimal faxing needs and a focus on simplicity and ease of use.

4. HylaFAX : A Reliable and Scalable Open Source Fax Server for Enterprises

HylaFAX has been a trusted name in the open-source fax server market for many years, offering a powerful and reliable solution for high-volume faxing. Its robust performance and scalability make it ideal for larger businesses and industries that require a more enterprise-grade faxing system.

Key Features of HylaFAX:

• High-Volume Fax Handling: HylaFAX is capable of handling large volumes of faxes, making it an excellent choice for enterprises and organizations with significant faxing needs.
• Multi-Channel Faxing: It supports multiple fax lines, distributing fax traffic to improve efficiency and reduce bottlenecks.
• Fax-to-Email Integration: Like many modern fax solutions, HylaFAX enables fax-to-email functionality for improved convenience.
• Comprehensive Security: With built-in encryption and other security features, HylaFAX ensures that sensitive information is kept safe during fax transmission.
• Community Support: As an established open-source project, HylaFAX benefits from extensive community support and resources.

For enterprises seeking a proven, reliable solution to handle high-volume faxing, HylaFAX remains a top contender in 2025.

5. Sangoma Fax for Asterisk: A Seamless VoIP-Compatible Fax Server Solution

Sangoma Fax for Asterisk offers a dedicated fax server solution for businesses using the Asterisk PBX system. This open-source fax server integrates with Asterisk to provide businesses with a comprehensive VoIP-compatible fax solution.

Key Features of Sangoma Fax for Asterisk:

• Asterisk Integration: Sangoma Fax works seamlessly with Asterisk PBX systems, allowing businesses that already use Asterisk to add fax capabilities without the need for additional infrastructure.
• Fax Over IP (FoIP): With T.38 support, Sangoma Fax ensures reliable fax transmission over IP networks, making it an excellent choice for VoIP service providers.
• Fax-to-Email and Web Interfaces: Like other solutions, Sangoma Fax supports fax-to-email and web-based management, streamlining fax communication.
• Cost-Effective: As an open-source solution, Sangoma Fax is an affordable option for businesses already using Asterisk PBX.

Sangoma Fax for Asterisk is ideal for businesses that need to integrate faxing with their existing VoIP infrastructure, providing a cost-effective and scalable solution.

Conclusion

In 2025, open-source fax server software continues to be a viable and reliable solution for businesses that need to manage fax communications efficiently. Whether you are looking for a multi-tenant fax server, a unified communications platform, or a simple and scalable solution, the options outlined in this article provide powerful tools for modern faxing needs.

• ICTFax and ICTBroadcast lead the way with comprehensive features, multi-tenant support, and scalability, making them the best choices for businesses that need advanced capabilities.
• OpenFax offers a simpler, user-friendly solution for smaller organizations with straightforward faxing needs.
• HylaFAX remains a trusted choice for enterprises requiring high-volume faxing.
• Sangoma Fax for Asterisk caters to businesses using Asterisk PBX systems, providing seamless integration and reliable faxing.

By evaluating these solutions and considering the specific needs of your business, you can choose the best open-source fax server software that aligns with your goals, improves operational efficiency, and ensures secure document transmission.