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Increasing Productivity Has Never Been Easier

Consolidating and digitizing complex fax infrastructures modernizes analog processes and optimizes sustainable workflows. Benefit from unlimited scalability, maximum reliability, and the utmost security. Ensure that your faxes always arrive when and where they need to, all while meeting the highest availability and compliance requirements.

The Email API for Successful Customer Relationships

Create excellence throughout the customer journey—Retarus’ Email API allows you to send transactional emails with the world’s fastest platform. Directly from your business applications and ecosystems. Up to ten million emails per hour with maximum deliverability and reliability. 100% in compliance with data protection regulations such as HIPAA.

Reach Your Customers Where They Are

Authenticate, confirm, remind, warn, inform—with Retarus Enterprise SMS you can reach your contacts reliably and effectively. Seamlessly integrated into your business applications and ecosystems. Achieve the optimal throughput for your messaging needs and reach 99% of all mobile networks.

Digital Communication for the Business of Tomorrow

Ensure communication with customers and suppliers, modernize messaging infrastructures, automate manual business processes—with Retarus’ intelligent cloud solutions you can secure your communication today for the business of tomorrow.


Global Fax Trends and Innovation: 2024 and Beyond

Our fax experts came together to discuss trends in the messaging market, strategies to solve modern challenges by leveraging AI, and the future of fax.

Watch the webinar

Fax from Epic

Increase productivity through Epic integration

Centralize EHR communications. Integrating Retarus Cloud Fax into Epic streamlines the secure transmission of PHI, increasing security and reliability. Discover how this certified solution improves efficiency and productivity in compliance with industry and regulatory requirements.

Integrate fax with Epic


IT Trends, News, and more

Discover valuable insights in the world of cloud messaging and stay informed about Retarus’ latest product updates, new integrations, and industry trends. Explore our corporate blog for in-depth articles that matter to your business.

Retarus Blog

Upcoming Events & Webinars

Retarus at HIMSS24
Orange County Convention Center
Mar 11, 2024Mar 15, 2024
At this year’s HIMSS, not only will we show healthcare organizations how to vastly reduce administ...

Retarus Worldwide, On the Spot:


Feb 20-21, 2024
5. BME Einkaufsforum Mittelstand
BI-Solutions for Procurement and Supply Chain
Mannheim (DE)
Feb 24, 2024
München (DE)
Mar 13-25, 2024
HIMSS 2024
Healthcare Forum, Messaging Platform
Orlando, Florida (US)
Mar 19-21, 2024
S.I.T.L. (Semaine de l’Innovation du Transport et de la Logistique)
BI-Solutions for Procurement, Logistics, Supply Chain
Paris Nord Villepinte (FR)
Mar 26-28, 2024
InCyber Forum 2024
Email Security, Email Compliance, Email Infrastructure
Lille Grand Palais (FR)
Apr 17-18, 2024
Strategiegipfel IT Management
Secure Email, Integration and Automation, Enterprise Messaging
Berlin (DE)
Apr 18, 2024
Paragon Customer Communications Day
BI-Solutions, E-Invoicing
Frankfurt (DE)
Apr 25, 2024
Retarus Partner Premiere #4
Use Case Dating: Finance, Healthcare, Supply Chain & Industry
Restaurant Le Ciel de Paris (FR)
May 14-15, 2024
Telekom Partnertag/Telekom Kundentag 
BI-Solutions, E-Invoicing
Bonn (DE)
May 14-15, 2024
BME - eLösungstage, Netzwerk, Austausch, Benchmark
BI-Solutions for Procurement, Consumer Goods, Data Management, Supply Chain
Düsseldorf (DE)
May 21-23, 2024
Paris Porte de Versailles (FR)
May 29-30, 2024
Email Security, Transactional Email
Espace Champerret Paris (FR)
Jun 4-5, 2024
Coter Numérique 33éme Congrès
Email Security, Transactional Email
La Rochelle (FR)
Jun 6, 2024
Österreichischer Logistiktag
BI-Solutions for Procurement and Supply Chain
Linz (AT)
Jun 10-11, 2024
Berlin (DE)
Jun 12-13, 2024
Procurement Summit
BI-Solutions for Procurement, Sales, Finance, Supply Chain
Hamburg (DE)
Sep 11-12, 2024
Accounting Summit
Düsseldorf (DE)
Oct 19, 2024
Lissabon (PT)
Oct, 2024
BME Symposium Einkauf & Logistik
BI-Solutions for Procurement, Logistics, Supply Chain
Berlin (DE)

On Demand Webinars

Global Fax Trends and Innovation: 2024 and Beyond
Join a collection of Retarus’ fax experts to discuss critical trends within the messaging market, ...
Trust in the Digital World
Listen as representatives of PAC, Novid20 and Retarus are discussing the importance of trust in the ...
Assessing the Value of Interoperability in the Patient Communication Lifecycle
Exposing patient details creates financial and reputational risks and can even harm health outcomes....

Secaucus // Jan 22, 2024
The Future of Business Communication: Three Trends for 2024

The experts at Retarus, specialist provider of enterprise-level cloud services for messaging, email security, and business integration, have identified three trends which are set to have a sustained impact on digital communication in 2024. Artificial intelligence, in particular, [...]

Read the press release

Secaucus // Nov 27, 2023
Retarus recognized as a Major Player in IDC MarketScape for Worldwide IDP

The IDC MarketScape report evaluated 28 vendors worldwide on their strategy and product capabilities, measuring a range of criteria such as delivery, customer satisfaction, functionality, research and development pace and portfolio benefits.[...]

Read the press release

Secaucus // Nov 14, 2023
Retarus launches new service to reduce administrative efforts for email encryption

Munich-based enterprise cloud service provider Retarus has made its new User Synchronization for Encryption (USE) service available to their customers. The service is an integral component of Retarus’ Email Encryption solution and enables IT security managers to automate [...]

Read the press release

Recognized by leading Analysts

Find out what renowned analyst firms such as such as Gartner, IDC, and KLAS have to say about Retarus’ platforms and cloud services.

One of the best characteristics Retarus has about their innovation is its cloud platform itself; specifically designed from the ground up and purposely built for enterprise faxing.

Mark D. Malone, Industry Analyst

It makes a lot of sense to separate service emails and regular business transactions from the general email flow.

Paul McKay, VP Research Director, Forrester

By flattening out communication logistics challenges, with their secure and reliable solutions, Retarus was able to help a critical public health project deliver real value to citizens in an incredibly short timeline.

Ollie O’Donoghue, Senior Analyst, Teknowlogy

Why Retarus?


41% of S&P Global 100 companies

Customer Loyalty

71% have worked with us for over 5 years


62 Net Promoter Score (NPS)


7 Data Centers

2800+ servers


4.6/5.0 on Gartner Peer Insights


10+ million emails per hour


For seam­less SAP processes

Make your SAP applications or applications connected to the SAP cloud communicate via the Retarus Enterprise Cloud. With customers, suppliers, and partners. Via email, fax, or SMS. Incoming and outgoing. Securely, compliantly, and transparently. And in an auditable, scalable, and calculable way.

More for your SAP

Cloudi­fi­cation with Retarus

From the digital workplace to process communication along the supply chain— modernize and consolidate your messaging infrastructure with Retarus Cloud Services for email, fax, and SMS. Ideally paired with Microsoft 365 and business applications such as SAP and Salesforce. 100% compliant with regulations and open for individual customer requirements.

Welcome to the future

Digital Trans­formation with Retarus

Digitize and automate manual ordering processes, close digital gaps in supply chains, automatically convert unstructured data into structured data—no matter which are the goals on your agenda: When it comes to digitizing and automating communication processes, Retarus is the right choice.

For flawless supply chains

By Developers for Developers

Do you need API references, code snippets, or a how-to tutorial? The Retarus Knowledge Center provides helpful information as well as guides and quick start info for the easy integration of our cloud services into your company.

What’s Next?

Started Now!

We support you in making your business communications more efficient and secure. With cloud products that enable the reliable exchange of information. For people, applications, and machines. With outstanding quality and first-class service. And with great people. To support you anywhere in the world. When will we meet?

Contact us now