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Digital Communication for the Business of Tomorrow

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

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 the GDPR.

Keep Your Processes and Supply Chains up and Running Even during Downtimes

An email infrastructure failure can very quickly result in supply chain disruptions. Quite often, it even causes a complete business interruption. Make therefore sure to secure your communications with Retarus, so that your company stays productive even if your own email infrastructure is unavailable.

The 2022 Gartner® Market Guide for Intelligent Document Processing Solutions

IT analyst Gartner® has published its first “Market Guide for Intelligent Document Processing Solutions” (IDP). Automating manual steps in document processing, increasing process efficiency, reducing costs—this market guide provides an overview of the global IDP market in which Retarus plays an important role with its Intelligent Document Processing cloud solution.

Reduce Manual Effort

Lower Your Costs by Digitizing Ordering Processes

Retarus WebConnect for Suppliers allows you to integrate B and C suppliers (who do not use EDI) directly into your supply chain. Use our interactive calculator to find out how much this could save you.

Calculate your potential savings now

Recommended by Experts

On the Radar: Retarus Secure Email Platform

IT analyst firm Omdia took a close look at various email services. Find out why you need to have Retarus Secure Email Platform on your radar for securing your communications. As a complete solution or as a supplement to Microsoft 365/Teams, Google, Salesforce, or SAP.

Download the report


Retarus is ISO 27001 certified

The communication services offered by Retarus have now also been certified in accordance with ISO 27001 (DIN EN ISO/IEC 27001:2017). For our customers, the certification once again affirms that their data is always in safe hands with us.

Read Press Release

Upcoming Events & Webinars

5. BME Einkaufsforum Mittelstand
Dorint Kongresshotel Mannheim
20. February 202421. February 2024
Auf diesem BME-Forum dreht sich alles um den Einkauf in mittelständischen Unternehmen: Aktuelle Her...
Sécurisation des e-mails dans le secteur public et les professions réglementées. Retarus présente son offre souveraine et ses références.
Cloud Services for the Healthcare Industry
22. February 2024 · 11:00 am11:30 am
Chez Retarus, nous comprenons que le secteur public et les professions réglementées exigent des se...
Die E-Invoicing-Pflicht in Deutschland kommt:neue Herausforderungen der elektronischen Rechnungsstellung meistern
Online Webinar
29. February 2024 · 10:00 am10:30 am
Nach den Bundesbehörden akzeptieren auch die Bundesländer keine PDF-Rechnung mehr. In diesem Webin...
Retarus at HIMSS24
Orange County Convention Center
11. March 202415. March 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, ...
C-Lieferanten nahtlos integrieren – Bestellprozesse clever automatisieren
Erfahren Sie in diesem Webinar, wie Sie B- und C-Lieferanten nahtlos in Ihre Lieferkette integrieren...
Mehr Effizienz im Einkauf, Vertrieb und Finanzwesen durch digitale Belegerfassung
Webinar zur Digitalisierung im Einkauf durch automatisierte Belegerfassung und Intelligent Document ...

Munich // 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

Munich // 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

Munich // 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 Gartner, Forrester, Radicati, and KuppingerCole have to say about Retarus’ platforms and cloud services.

Intelligent document processing solutions are used to extract information from textual data, primarily documents, for analysis and workflow automation.

2022 Market Guide for Intelligent Document Processing Solutions

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

The platform [Retarus Secure Email Platform] can […] massively improve data protection and compliance by introducing managed pervasive digital signatures and encryption with S/MIME, PGP, or OpenPGP

Alexei Balaganski, Lead Analyst, KuppingerCole

Retarus’ Secure Email Platform is a comprehensive set of capabilities enabling the security and compliance of corporate email systems on both inbound and outbound traffic.

Rik Turner, Senior Principal Analyst, Omdia

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

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

Retarus delivers an attractive portfolio of email security capabilities in an efficient cloud-based solution that meets the needs of customers of all sizes.

Sara Radicati, PhD, President & CEO, Radicati

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


4.8/5.0 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, SMS, or EDI. 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, SMS, and EDI. Ideally paired with Microsoft 365 and business applications such as SAP and Salesforce. 100% GDPR-compliant 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 services that enable the reliable exchange of information. For people, applications, and machines. 100% GDPR-compliant. 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