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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 Capture Services 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

BME-Symposium Einkauf und Logistik
Station Berlin
18. October 202320. October 2023
Erfahren Sie auf dem BME-Symposium Einkauf und Logistik, wie Sie Einkaufs- und Logistikprozesse effi...
Partner Premiere #2: Secure Email Gateway
Restaurant le Ciel de Paris – Paris
30. November 2023 · 09:00 am11:30 am
Lors de la 2ème Retarus Partner Premiere, vous découvrirez comment simplifier une migration d’ap...
Partner Premiere #3: Souverain Cloud Messaging
Restaurant le Ciel de Paris – Paris
1. February 2024 · 09:00 am11:30 am
Lors de la 3ème des Retarus Partner Premieres, vous découvrirez comment le cloud souverain Retarus...
Partner Premiere #4: Use Case Dating
Restaurant le Ciel de Paris – Paris
25. April 2024 · 09:00 am11:30 am
Dans la dernière des Retarus Partner Premieres, rencontrez les experts de Retarus et explorez des u...

Retarus Worldwide, On the Spot:



Oct 02-05, 2023
Avant Special Forces Summit
Networking, Agent Community, Cloud Communications
Sheraton Phoenix Downtown (USA)

Oct 03-04, 2023
Salon Solution
Transactional Email & SMS, Cloud Fax Services
Paris Expo Porte de Versailles (FR)

Oct 10-12, 2023
Email Security, Email Compliance, Email Infrastructure
Nürnberg (DE)

Oct 11-13, 2023
ARG National onsite
Networking, Agent Community, Cloud Communications
Orlando (USA)

Oct 16-19, 2023
Channel Connect
Cloud Communications, Sales, Finance, Retail
Orlando (USA)

Oct 18-20, 2023
BME - Symposium Einkauf & Logistik
BI-Solutions for Procurement, Logistics, Supply Chain
Berlin (DE)

Nov 07, 2023
BME - Online-Reihe SCM, Digitalisierung in der Supply Chain
BI-Solutions for Procurement, Sales, Finance, Supply Chain
digital (DE)

Nov 15-16, 2023
Cloud & Cyber Security Expo
Email Security, Email Compliance, Email Infrastructure
Paris Expo Porte de Versailles (FR)

Nov 20-21, 2023
BI-Solutions for Supply Chain, Manufacturing, Automotive,Email Security
Berlin (DE)

Nov 24-25, 2023
Einstieg München Messe für Ausbildung, Studium & Gap Year
München (DE)

Nov 27 - Dec 01, 2023
BME - Digitale Woche
BI-Solutions for Procurement, Sales, Finance, Supply Chain
digital (DE)

Nov 27 - Dec 01, 2023
AWS re:Invent
Networking, Automation, Cloud Innovation, SI
Las Vegas (USA)

Nov 30, 2023
Retarus Partner Premiere #2
e-invoicing and BI-Solutions
Restaurant Le Ciel de Paris (FR)

Nov 30, 2023
Trophées CTO, CRiP
Digital Transformation, IT Innovation
InterContinental Paris - Le Grand (FR)

Feb 01, 2024
Retarus Partner Premiere #3
Secure Email Gateway
Restaurant Le Ciel de Paris (FR)

Feb 24, 2024
München (DE)

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 25, 2024
Retarus Partner Premiere #4
Use Case Dating: Finance, Healthcare, Supply Chain & Industry
Restaurant Le Ciel de Paris (FR)

Oct 19, 2024
Lissabon (PT)

Webinar Recordings

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 ...
Neueste Anforderungen im E-Invoicing in Deutschland und Europa erfolgreich umsetzen
Webinar zum Status von E-Invoicing, XRechnung und Peppol in Deutschland und Überblick zu E-Rechnung...

Munich // Sep 15, 2023
Retarus enhances its Secure Email Platform with new outbound features

The range of functions provided by the Retarus Secure Email Platfom has been expanded to now offer additional control and security when sending out emails. These tools effectively prevent the transmission of outbound spam and phishing mails, while also enabling the limiting of [...]

Read the press release

Munich // Aug 24, 2023
Cloud-based communication: 3 tangible benefits for airlines

Communicating with employees, partners, and passengers is a key challenge for airlines. Suffice it to say that to keep airport operations running at maximum efficiency, the staff of major airlines send and receive on average hundreds of thousands of fax documents and SMS [...]

Read the press release

Munich // Jul 27, 2023
Bechtle and Retarus announce partnership

Munich-based enterprise messaging provider Retarus has entered into a partnership with Germany’s largest IT system integrator Bechtle. With immediate effect, Retarus’ highly flexible cloud solutions for email security and enterprise messaging have been included in the portfolio [...]

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