About Us

An open source platform for everyone, that is the innovative idea.

Behind every good project is a strong team: we, that is Norbert Lambing, Victor Tesla and Mike Williams, came together in 2019 to make our idea of an open source platform a reality. With the exigencies of the global pandemic in early 2020, we were encouraged to find an alternative to centralized proprietary software solutions in foreign jurisdictions and isolated open source vendors. It was a challenge we were happy to take on:

With grammm, it no longer matters how many communication channels you use. The inefficiency of context switches in communication is a thing of the past with grammm. At the same time, grammm creates maximum privacy and security for one of your most valuable assets: your data. Decide for yourself where your data is stored – on your computer or off-site.

Why should you choose grammm?

Let’s start with a few questions – the answer will come naturally:

– How many communication channels do you use every day?

Imagine a communication platform with multiple communication paths – regardless of the device you use.

– Can you trust your communication channels for security and privacy?

Do you know in which location or country your data is centrally stored and who potentially has access to your data?

– What are your past expenses when it comes to your communication platforms?

Do you know all the costs involved, including software licenses, software subscriptions, service costs and maintenance fees, etc.?

– What was your experience with your previous communications solutions during the increased demands in the Covid pandemic from 2020?

Were you satisfied with the ease of use, speed, stability – and did you have a positive overall experience with all applications working together?

– How would you rate productivity in terms of communication needs?

How much time and effort is required to collect all the data from the various communication channels – as well as when using the various work tools?

What sets grammm apart

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grammm offers a wide range of interfaces… for optimal integration into a wide range of environments.

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As the first open source solution – with a full-featured implementation of Outlook Anywhere (RPC-over-HTTP) and MAPI-over-HTTP, grammm is the alternative to proprietary backends for native interoperability with Microsoft Outlook.

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With its efficient and optimized design, it even outperforms its proprietary counterparts in most areas.

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With the Linux platform as its foundation, and the scalability and manageability that comes with it, grammm impresses with its wide variety of implementation scenarios in your data center.

The management team

Norbert Lambing – CEO

Norbert is CEO and founder of grammm. Through his sports career at Olympic level, he knows exactly what skills it takes to succeed in a competitive world. Having won numerous championships and trophies, he has proven that he can shape teams – and tease out the strengths of each individual in the process.

He doesn’t admit it, but he’s our personal version of the non-migrant Styrian oak – only as a Viennese.

Victor Tesla – CDO

As CDO, Victor leads grammm’s great development teams. Message confidentiality is his top priority – that alone is due to his background in public service. The resulting skillset allows him to manage developers around the world.

Victor’s must-have: a keyboard that combines English and Cyrillic.

Mike Williams – CTO

Mike is the CTO and also the Mr. Technology of the quartet. He is especially wary of how we handle the gold of the 21st century: our data. Through his dissatisfaction with how unconscionably existing communications platforms use this valuable commodity, he has joined the grammm team.

He spends about 1/288th of his day choosing his favorite color of the day – plus, as a proud American, he still can’t resist Mexican food.

Martin Witte – CSO

As CSO, Martin makes sure that we can make a living from our passion for grammm. Thanks to his many years of experience at C-level in industry and in the support of government agencies and associations, Martin’s two qualities are particularly convincing: efficiency and professionalism.

His credo: Never leave home without a suit!

grammm has committed itself to the following corporate principles

The most progressive solution in the area of communication and collaboration: grammm, as an open source alternative, offers a platform for EVERYONE!

Customer orientation

With easy-to-use technology to your success: We have developed grammm for you to optimize your performance.


grammm keeps your technical effort as low as possible – and thus stands out from a multitude of complex technologies.


A robust component architecture and the highest standards of development quality ensure that our codes will last.


Nobody is perfect – certainly we are not. We have made it our goal to improve with each passing day.


Your most valuable asset in the digital age: your data. grammm helps you protect your data. By making our platform completely open source, independent IT professionals are available to assist you.


grammm is designed to make your digital life easier. You can expect fast, straightforward help – with no strings attached.


Let’s go on a journey through the digital universe together – you can trust us as professionals, we are always there to support you.