Insights

Strong Industry Presence Open-Xchange has established itself as a leader in mail, messaging, and DNS security services, with over 220 million seats sold globally through a wide network of hosting and telecom providers such as IONOS, Orange, and GoDaddy, indicating significant potential for upselling cybersecurity and collaboration solutions.

Open Source Expertise Rooted in open-source technology, Open-Xchange develops innovative cloud-based products like OX Cloud and PowerDNS, providing opportunities to target organizations prioritizing open-source, customizable, and privacy-respecting internet services.

Recent Product Launches The recent launch of OX Cloud via Thexyz and updates to DNS and security services demonstrate a focus on scalable, cloud-native solutions, opening sales prospects in organizations seeking modern, secure, and easily integrated communication platforms.

Growing International Presence With offices in North America, Europe, Asia, and partnerships across Southeast Asia and Malaysia, Open-Xchange serves diverse markets where multilingual, multi-region support and tailored cloud services could be leveraged for expansion and cross-selling opportunities.

Financial Strength and Market Scope With a revenue estimated between 100 to 250 million dollars and ongoing funding support, Open-Xchange is positioned for growth, presenting opportunities to introduce complementary products such as enterprise security, managed cloud services, and advanced collaboration tools to their expanding customer base.

Open-Xchange Tech Stack

Open-Xchange uses 8 technology products and services including Scality, D3.js, Choices, and more. Explore Open-Xchange's tech stack below.

  • Scality
    IT Infrastructure
  • D3.js
    Javascript Graphics
  • Choices
    Javascript Libraries
  • C++
    Programming Languages
  • HSTS
    Security
  • VMware
    Virtualisation Software
  • Comcast
    Web Hosting
  • GoDaddy
    Web Hosting

Media & News

Open-Xchange's Email Address Formats

Open-Xchange uses at least 1 format(s):
Open-Xchange Email FormatsExamplePercentage
First.Last@open-xchange.comJohn.Doe@open-xchange.com
95%
FLast@open-xchange.comJDoe@open-xchange.com
2%
L.First@open-xchange.comD.John@open-xchange.com
1%
LastF@open-xchange.comDoeJ@open-xchange.com
2%

Frequently Asked Questions

Where is Open-Xchange's headquarters located?

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Open-Xchange's main headquarters is located at Hohenzollernring 72 Köln, Nordrhein-Westfalen 50672 DE. The company has employees across 3 continents, including EuropeNorth AmericaAsia.

What is Open-Xchange's phone number?

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You can contact Open-Xchange's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Open-Xchange's official website and social media links?

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Open-Xchange's official website is open-xchange.com and has social profiles on LinkedIn.

What is Open-Xchange's SIC code NAICS code?

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Open-Xchange's SIC code is 2741 - Miscellaneous Publishing NAICS code is 5112 - Software Publishers.

How many employees does Open-Xchange have currently?

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As of October 2025, Open-Xchange has approximately 201 employees across 3 continents, including EuropeNorth AmericaAsia. Key team members include Chief Executive Officer: A. G.Cfo: M. S.Chief Operating Officer: S. M.. Explore Open-Xchange's employee directory with LeadIQ.

What industry does Open-Xchange belong to?

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Open-Xchange operates in the Software Development industry.

What technology does Open-Xchange use?

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Open-Xchange's tech stack includes ScalityD3.jsChoicesC++HSTSVMwareComcastGoDaddy.

What is Open-Xchange's email format?

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Open-Xchange's email format typically follows the pattern of First.Last@open-xchange.com. Find more Open-Xchange email formats with LeadIQ.

How much funding has Open-Xchange raised to date?

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As of October 2025, Open-Xchange has raised $25M in funding. The last funding round occurred on Oct 11, 2017 for $25M.

When was Open-Xchange founded?

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Open-Xchange was founded in 2005.

Open-Xchange

Software DevelopmentNordrhein-Westfalen, Germany201-500 Employees

About Open-Xchange

Open-Xchange (OX) is a market leader in mail/messaging and DNS-based security services, with more than 220m seats sold through international hosting and telco providers worldwide, including partners such as IONOS, Orange, Italiaonline, Comcast, GoDaddy, NTT and Softbank.

We at OX have our roots in Open Source, and this has shaped our view of the world and culture – open, diverse, and with a bias to act, giving everyone at OX room to take responsibility within their team and grow. OX believes in an internet that is open, safe and free. We want to create competitive products that allow our providers to deliver secure internet services with great user experience, and that respect privacy and generate value.

With some 270+ people worldwide, OX develops and operates Open Source software (aaS) for mail/messaging (OX App Suite, OX Guard) and collaboration/productivity (OX Drive, OX Documents). OX Dovecot is the world’s dominant open-source IMAP server software, and our OX PowerDNS provides secure DNS services to our telco customers and their users.

Our business is fast-paced and changing constantly. We are looking for people who share our beliefs, who are out there to make a difference, are entrepreneurial and enjoy working in a high-tech environment as part of a truly international team. OX is headquartered in Cologne, Germany, with further locations throughout Germany (Bremen, Dortmund, Hamburg, Nuremberg and Olpe), the USA (Palo Alto, CA, and New York, NY), Finland (Espoo), the Netherlands (Den Haag), Italy (Turin), and Japan (Tokyo).

Interested in working at Open-Xchange? 
Please visit: https://careers.open-xchange.com/jobs

Section iconCompany Overview

Headquarters
Hohenzollernring 72 Köln, Nordrhein-Westfalen 50672 DE
Phone number
SIC Code
2741 - Miscellaneous Publishing
NAICS Code
5112 - Software Publishers
Founded
2005
Employees
201-500

Section iconFunding & Financials

  • $25M

    Open-Xchange has raised a total of $25M of funding over 5 rounds. Their latest funding round was raised on Oct 11, 2017 in the amount of $25M.

  • $100M$250M

    Open-Xchange's revenue is estimated to be in the range of $100M$250M

Section iconFunding & Financials

  • $25M

    Open-Xchange has raised a total of $25M of funding over 5 rounds. Their latest funding round was raised on Oct 11, 2017 in the amount of $25M.

  • $100M$250M

    Open-Xchange's revenue is estimated to be in the range of $100M$250M

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