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The Right Data to the Right Person at the Right Time

Easy to say but hard to do.

Ensure your faxes always arrive when and where you need them 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 Worldwide, On the Spot:


May 29-30, 2024
Email Security, Transactional Email
Espace Champerret Paris (FR)
June 03-04, 2024
Telekom DigitalX Nord 
BI-Solutions, E-Invoicing
Hamburg (DE)
Jun 6, 2024
Österreichischer Logistiktag
BI-Solutions for Procurement and Supply Chain
Linz (AT)
Jun 10-11, 2024
Berlin (DE)
Jun 11, 2024
Bechtle IT Forum 2024
Messaging, Email Security, IDP
Lausanne (CH)
Jun 12-13, 2024
Bechtle BEST24
Email Security
Neckarsulm (DE)
Jun 12-13, 2024
Procurement Summit
BI-Solutions for Procurement, Sales, Finance, Supply Chain
Hamburg (DE)
Jun 12-13, 2024
Email Security
Paris (FR)
Sep 11-12, 2024
Accounting Summit
Düsseldorf (DE)
Oct 15-17, 2024

Leipzig (DE)
Oct 19, 2024
Lissabon (PT)
Oct 22-24, 2024
Email Security
Nürnberg (DE)
Oct, 2024
BME Symposium Einkauf & Logistik
BI-Solutions for Procurement, Logistics, Supply Chain
Berlin (DE)

On Demand Webinars

From stale to state-of-the-art: unlocking the maximum value and efficiency from communications
Join Retarus’ fax experts and Nick Richards from SoftwareOne as they lay out how to navigate the c...
Global Fax Trends and Innovation: 2024 and Beyond
Retarus’ fax experts discuss critical trends within the messaging market, what that means for orga...
Trust in the Digital World
Listen as representatives of PAC, Novid20 and Retarus are discussing the importance of trust in the ...

Secaucus // May 22, 2024
Retarus elevates its ENS certification to the high level, reinforcing its commitment to information security

Retarus, global provider of Cloud solutions for Fax, SMS, Transactional Email, and Email Security, has announced the elevation of its National Security Framework (Esquema Nacional de Seguridad = ENS) certification from medium to high, achieving the highest possible level of this [...]

Read the press release

Secaucus // Mar 26, 2024
Retarus expands strategic collaboration with Canadian TELCO provider ThinkTel

Retarus has expanded its collaboration with longstanding carrier partner ThinkTel. Independent connections between multiple data centers in Canada and Germany makes the worldwide Retarus fax network even more resilient in the event of a disruption and ensures optimum quality for [...]

Read the press release

Secaucus // Mar 19, 2024
Global leader in fresh grocery logistics, IFCO, entrusts Retarus and Telekom with digitalizing its ordering processes

IFCO, the international market leader in reusable packaging containers for fresh grocery products, now uses Retarus Cloud Fax for its ordering and billing processes. Suppliers using IFCO will also have the opportunity to place their orders for reusable packaging containers via [...]

Read the press release

Recommended by the Best

From digitization and automation to cloudification and security—find out how Retarus’ cloud services help companies around the world become more successful.

Cloud Fax Webexpress

High Performance Communications at Adidas

Adidas uses Retarus’ innovative fax service to handle the high volume of fax transmissions they need to contact business partners.

Read the customer testimonial

Cloud Fax

Avis relies on Retarus’ Managed Fax Services

Avis is considered one of the world’s top car rental companies and relies on Retarus mail-to-fax to send fax through mail and optimize its communication process.

Read the customer testimonial

Cloud Fax

A US-based global bank relies on Retarus

Discover how Retarus supports the global, market-leading banking corporation in the cloudification of their on-premises fax servers and the digitization of […]

Read the customer story

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