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Cloud Fax Services Our Throughput Rate Increases Your Productivity

Consolidate, digitize, automate – with Retarus Cloud Fax Services, your faxes always reach their destination. Read our white paper to learn how you can cut your investment and process costs up to 70% with Retarus, an enterprise fax provider.

Cloud Fax Services for Digital Processes

Faxing is an integral part of many business processes. As a tested and standardized technology, faxing is easy to use and can be integrated in almost any system landscape. Faxing is secure and immune to viruses. Faxes can be traced from the time they are sent to the time they are received and are legally binding. And faxing is digital.

Retarus’ innovative cloud fax services help you digitize analog business processes simply and optimize sustainable workflows. Retarus Cloud Fax Services are essential to your migration to All IP and support you in consolidating and simplifying your infrastructure. Once you are connected to the Retarus Enterprise Cloud, you benefit from the scalability you need, maximum reliability and the highest level of security. At the same time, with online fax services your investment- and process-related costs are up to 70% less than those for self-operated fax machines, servers and fax infrastructures.

Tap into Your New Potential with Retarus as Enterprise Fax Provider

Want to digitize and automate incoming orders? Do you need to send hundreds of thousands of delivery orders to florists for Mother’s Day? Or do you have to fax from an application, e.g. life-saving laboratory reports directly to the operating room? With Retarus’ enterprise cloud fax services, your information flows reliably at all times. Anywhere in the world. Incoming and outgoing. With Retarus as your enterprise fax provider, you reach the highest requirements for availability and transaction security, as well as country- and industry-specific regulations for data protection and data security, such as GDPR, HIPAA, and PCI DSS. A cloud fax service offers many possibilities to increase efficiency and reduce costs.

IT Security Made in Europe

Made in Europe

Connect with an Expert.

Do you have any questions about enterprise fax services? Request more information now or test Retarus Cloud Fax Services at no obligation. We look forward to hearing from you.

Retarus and Symtrax provided us with a turnkey solution that we could test immediately under real production conditions. We were able to use the solution productively within two days.
Read Case Study
Jean-Michel Brégeat

Department Manager, Aigle

Retarus Mail2Fax not only saves us a significant amount of time, but it also helps us respond reliably and quickly to partners and insurance companies.
Read Case Study
Stefan Bode

Director of Information Technology, Avis SAP Customer Service Center

14 Advantages of Retarus Cloud Fax Services



Reduce your fax transmission failure rate by up to 10% and reduce the administrative costs involved in manually processing your faxes. Retarus' NeverBusy Technology ensures that multiple faxes are never sent to the same recipient simultaneously. Thanks to this technology, even high volumes of incoming faxes are delivered immediately—no busy lines or capacity bottlenecks.


Intelligent Routing

Achieve up to 30% more throughput with Retarus' enterprise fax services using our cloud fax API. Active Carrier Management in the Retarus Enterprise Cloud automatically uses the lines and carriers whose line quality and availability best match your fax job. With Retarus you can also send your fax from any application - quickly and reliably.


Scalable and Flexible

Eliminate over- and under-utilization of capacity with our online fax services and API. Regardless of whether you send 1,000 faxes today and one million tomorrow—the Retarus Enterprise Cloud provides you with the exact bandwidth you need at any given point in time without a single fax machine or traditional desktop-fax software in your office.


Global and Available Anytime

Rely on reliable transmission worldwide. The Retarus Enterprise Cloud offers high availability and high capacity, with its own data centers in Europe, Asia, and the USA, providing maximum availability and delivery reliability. 24/7.


OCR and Barcode Recognition

Retarus' enterprise fax services enable you to seamlessly integrate faxing into your workflows. Read out information or barcodes from incoming documents with the Retarus OCR and barcode recognition feature and then use customized smart routing options to presort, forward, store, or process the documents automatically according to your rules.


Seamless Integration

Whether you use an ERP, a CRM or a legacy system, Microsoft 365, or Google Workplace — thanks to open standards, you can connect Retarus Cloud Fax Services to almost any business or cloud application. For example, via RESTful-API web service or via standard interfaces and protocols such as SMTP, SFTP and HTTPS.


Monitoring and Analysis

Check the status of your fax communications at any time using dashboards and detailed reports in the web-based Retarus Enterprise Administration Services Portal. In real time or in user-defined periods. For both outgoing and incoming faxes.


OPEX instead of CAPEX

Reduce your investment and process costs. Retarus lets you massively reduce or completely eliminate costs for telephone and fax infrastructures, fax servers, software, updates, administration, and maintenance. Retarus billing models (flat rate or pay-per-use) use fixed batch and page pricing, regardless of the duration of transmission.


Security and Compliance

Rely on maximum security. The Retarus Enterprise Cloud, with its global data centers, fulfills the most stringent country and industry-specific requirements for data protection and data security. For example, the GDPR, PCI DSS, or HIPAA.



Ensure highly secure online faxing communications. Connection to the Retarus Enterprise Cloud is exclusively via encrypted connections (TLS, VPN). The Retarus fax services will also sign and encrypt incoming fax documents for you upon request—depending on the file type per AES 256-bit, PGP, or X.509.


Long-Term Archiving

Ensure full compliance with industry-specific or statutory regulations. Retarus' long-term archiving helps your fax communications comply with the most stringent data security and integrity requirements.


Enterprise-Level SLAs

It doesn't matter if you are an international enterprise, a mid-sized company, or a startup. Choose the service level agreement that best meets your needs in terms of quality, support, and response time. We offer customized SLAs to guarantee special requirements, for example, the exclusive processing of your data in a special Retarus data center.


Worldwide Telephone Number Service

Receive faxes anywhere in the world with local numbers. Retarus provides service and call numbers on all continents that can be managed and assigned easily in the EAS Portal. It is also possible to port existing incoming fax numbers at any time.


Service and Support

Experience first-class support built on our expertise. The Retarus Service and Support Team is here to help you solve problems, answer your questions, or help you find the right solution for your needs. Anywhere in the world. You can even be assigned a personal service manager upon request.

Use Cases: Cloud Fax Solutions for Real World Applications

Optimized order processes via fax cloud solution


How fax orders result in automated order processing.
Automate order processes
error-free digital communication thanks to Retarus Fax API<smallest>s</smallest>

Migrating to All IP

How companies guarantee fax quality in IP environments.
Fax digitally without errors now
secure transmission of laboratory results thanks to cloud fax services

Data security

How confidential lab data is transmitted quickly and reliably.
Transmit sensitive data reliably

Which Cloud Fax Service Meets Your Requirements?

Fax Inbound Services

Receiving Faxes via Applications or Web Services


With Retarus Fax2Application/Fax2Webservice, you can receive online fax documents as PDF or TIFF files via web service directly in your applications. Service options such as text and barcode recognition (OCR), signature or encryption, allow you to optimally integrate digitized documents in existing workflows so they are available immediately for automatic processing.
Technical specifications

Receiving Faxes with FTP Servers


With Retarus Fax2FTP, you receive faxes as PDF or TIFF files on one FTP server. These documents can be simply and flexibly integrated in existing workflows and processes and automatically processed without having to be digitized later, which costs time and money.
Technical specifications

Receiving Faxes with Email Clients


Retarus Fax2Mail is the smart solution for receiving faxes digitally. Your employees receive faxes as email attachments (PDF or TIFF) directly in your email client. You don’t need your own fax infrastructure and you eliminate costs associated with a fax server, maintenance, updates, and lines. An ideal solution for IP-based telecommunications infrastructures.
Technical specifications

Receiving Faxes with Document Capture (OCR/ICR/IDR)

With Retarus Fax2EDI, you can digitize and automate analog receipt of documents and integrate business partners without EDI directly in your EDI processes. There is no need for manual entry of incoming documents and sources of error are kept to a minimum. You benefit from faster order processes, a faster cash flow and a cost benefit of approximately 60% compared to manual order entry.
Technical specifications

Receiving Faxes with Multifunction Devices

Do you still need paper-based incoming faxes for your business processes? Print your documents with Retarus Fax2Printer directly from your network printers or multifunction devices. Upon request, we can deliver them simultaneously via email, for example, to archive them or integrate them in digital workflows.
Technical specifications

Fax Outbound Services

Sending Faxes with Applications or APIs


Whether ERP or CRM, mobile or web application, Microsoft or Oracle, on-premises or in the cloud. With Retarus Faxolution for Applications, you can integrate your faxes in almost any business or cloud application, using standard interfaces and protocols such as SMTP, SFTP, and HTTPS or APIs such as SOAP and REST. Without hardware and software installation, without a fax server. But with numerous development-friendly functions to simply and quickly fit your system and development landscape.
Learn more about Retarus Fax APIs | Technical specifications

Sending Faxes with SAP


With Retarus Faxolution for SAP, you can send business documents such as quotations, order confirmations, and orders straight from your SAP or SAP S/4HANA application. Securely and according to your needs via Retarus’ SAP-certified Cloud Fax Services—seamlessly integrated per BC-SMTP in your SAP environment. Without system modifications, hardware and software installation, and without a fax server. But with almost unlimited faxing capacity. Ideal for batch processing with immediate notification of delivery status to the SAP system.
Technical specifications

Sending Faxes with Epic

Connector API

With Retarus Faxolution for Epic, you can send all your Epic faxes including laboratory results, prescriptions, insurance claims and other documentations containing patient health information directly from your Epic application. Secure and with adherence to the industry compliance standards such as HIPAA and HITRUST (pending), Faxolution for Epic integrates Retarus cloud fax seamlessly into your existing Epic environment. This is implemented without any system modifications, or software and hardware installations. Using Retarus you can increase your fax delivery rates and speeds thereby improving efficiencies and automating workflows.
Learn more about Faxolution for Epic | Technical specifications

Scan and Send Faxes from MFDs through PaperCut

Connector APISMTP

With Retarus Faxolution for PaperCut MF, you can send faxes through scan to fax functionality within your PaperCut MF Application. The integration supports secure authentication to the Retarus Cloud Fax service without leaving the PaperCut MF environment. PaperCut’s MF scan to fax can be implemented with PaperCut’s MF Basic experience (SMTP) and/or PaperCut’s MF Advanced experience (API Service), both of which are supported by Retarus Cloud Fax.
Technical Specifications

Sending Faxes from ActFax

Connector API

ActFax supports fax transmissions from any workstation and application. Here, Retarus can provide the connection to the public telephone network via its enterprise-level cloud fax. This integration improves fax performance and scalability over the use of external modems, fax boards, and telco lines, which are no longer required. It also supports UCC or data center initiatives by eliminating the need for these legacy external components.
Technical Specifications

Sending Faxes with Email Clients


With Retarus Mail2Fax, you can send fax documents simply and easily from anywhere via email through Retarus’ Enterprise Cloud. From any email client or cloud service such as Microsoft 365 and Google Workplace or from your mobile device. For Microsoft Exchange, Microsoft 365, and HCL Notes Domino there are special integration solutions with even more features such as Active Directory Synchronization.
Technical specifications

Sending Faxes with Windows Applications

Whether you are sending personalized individual faxes or numerous faxes with the Microsoft Word mail merge function, Retarus Faxolution for Windows allows you to send faxes directly from your desktop, from Microsoft Office, or any other Microsoft Windows application. Simply send your fax from any application – quickly and reliably with the Retarus Enterprise Cloud.
Technical specifications

Sending Faxes with a Web Browser


With Retarus WebExpress, you can send faxes simply and easily from your web browser. Including management for templates, distribution lists, and black lists. Compliant with the German Federal Data Protection Act (BDSG) and the German Federal Financial Supervisory Authority (BaFin). Its workflow-optimized design allows you to send faxes in no time via the Retarus Enterprise Cloud. Upon request, a qualified Retarus Team can send faxes for you.
Technical specifications