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Reviews and expert opinion RZKH

Tony Loton Tony Loton Web Hosting Expert

RZKH’s hosting solutions are primarily aimed at programmers who want anything from a small hosted development playground to a big redundant environment on the newest IBM hardware.

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Rechenzentrum Kreuznach (RZKH) was founded in 2001 by Holger Scherer, a renowned IBM System i and AS/400 expert and regular community speaker. The company’s data center moved to Rhineland-Palatinate in 2007, and then to a 1960s era German nuclear fallout shelter in 2009.

RZKH specializes in hosting, programming and consulting for IBM AS/400 and iSeries IBM hardware.

The RZKH website supports the German and English languages.

Features and Ease of Use

RZKH’s hosting plans are designed to suit a wide variety of users… as long as those users are IBM aficionados. To give you an idea of how targeted these plans are, I can tell you that the company promises to help you with hosting “even if you need to compile BASIC on V3R2.”

The company’s target customs are:

  • Individual developers doing IBM ‘i’ programming
  • Globally distributed development teams that want to work with shared data and programs
  • Corporate customers who need to copy their production environments for development or testing purposes
  • Corporate customers who don’t want to manage their own production environments
  • Former IBM AS/400 users who need to keep data/programs online for auditing purposes

Some unique features of RZKH’s hosting plans include access to (S)FTP/SCP servers, SAN-based RAID 6 disks, dynamic CPU management, and dedicated VPN setup (to be negotiated).

In addition to shared hosting for single or group accounts, RZKH also offers dedicated partitions/hardware to host your own operating system.

Pricing and Support

RZKH’s business price list suggests that its plans are competitively priced. However, every hosting solution is quoted individually based on the customer’s exact requirements in terms of:

  • OS version
  • CPU power
  • Disk and main storage
  • Planned period of use (from one month up to decades)
  • Data backups
  • Service level
  • Coding requirements and user support

You can call the company, or reach out via email or email-based ticket system. No business hours are stated, but it’s almost certainly not 24/7 unless this is specified in your bespoke SLA. Unfortunately, my exploratory email went unanswered.

The self-help resources are not much help at all. There is an empty blog, a software and tools page describing only the esoteric FB400 backup system, and a slightly more helpful list of useful links:

How much does RZKH cost?RZKH offers multiple plans priced highest to lowest. The price depends on which type of hosting plan you choose. You can see the updated pricing table (updated weekly) below.
Which RZKH plan should I get?My recommendation is to start with a cheaper plan. You can always upgrade later on. RZKH can help you with the migration to a more expensive plan. The increase in visitors many times takes longer than expected and you shouldn’t pay a lot of money until the need arises. Of course, your needs may vary, and you can consult with a hosting expert from RZKH here.
How good is RZKH’s customer support?RZKH is not ranked as one of our top web hosts. But that can also be a result of RZKH being a small, under the radar, hosting provider. There are advantages to a small hosting company – as a customer, you are more important to them. You can also check out our comparison of the most popular web hosting services here.


How does RZKH match up to the competition?

HostingerCompare 4.9 Compare
InterServerCompare 4.8 Compare
RZKHCompare 4.1 Compare
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User reviews

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If you need hosting for your particular IBM programming requirements, you might find that RZKH is uniquely positioned to help you. For everyone else, this is probably not the host you’re looking for.

RZKH might offer a good service at a reasonable price, but does it match up with the top web hosting companies? We find it hard to say “yes.”


  • 18+ years of experience in IBM ‘i’ and AS/400 hosting
  • Customized pricing for customers’ exact requirements
  • Safe data center (in a former nuclear fallout shelter)
  • Easy migration between plans


  • No 24/7 live chat
  • IBM-only hosting
Tony Loton Tony Loton
Tony Loton has been a prolific writer and editor of business, technology and finance books, magazine articles, and corporate content for longer than he cares to say. It's a vocation, not a job!

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