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Founder of Praxis · New York

Marc Kleinmann

I build with AI. I teach business owners to use it.My story ↓

Builder & instructor

Marc teaching a group

Praxis

AI assistants, applications, and training for your business.

Work with Praxis

What I’m working on

Projects, ideas and things you can use.

About me

I’ve been
building things
since 1996.

I started in Dallas in 1996, making visual effects for TV commercials and broadcast graphics. At Softimage in Montreal, from 2001 to 2003, I worked with studios, taught people to use the software and demonstrated it at industry events.

Then I spent 15 years designing and building homes. The problems I ran into there became the reason to build software.

Modern home and long courtyard pool featured on the Bauhaus homepage — Bauhaus | Modern HomesCurrent homepage image

2003–2018 / Bauhaus

Fifteen years
building homes.

I founded Bauhaus | Modern Homes in Dallas–Fort Worth in 2003. We designed and built modern custom homes and high-end renovations. The work earned Dallas Builders Association ARC Awards and Best of Houzz recognition for design.

Running the company meant working through design decisions, estimates, materials, suppliers and the people responsible for getting a home finished. I stepped out of daily operations in 2018. Harrison South acquired Bauhaus in 2021, three years later.

Archived VIRTUALhaus product interface showing floor plans and wall drawing tools — VIRTUALhaus · Product archiveImagery via Abe Robertson

2018–2022 / VIRTUALhaus

Building software
for the work I knew.

The problems I had experienced at Bauhaus led me to found VIRTUALhaus in 2018. As founder and Head of Product through 2022, I worked on a 3D marketplace for building products and materials, for architects, builders and homeowners.

In 2019, I began working with Merantix Labs in Berlin on machine learning and computer vision. We built an early internal version of a system that turned 2D plans into 3D models, material takeoffs and estimates. That was the start of my work with AI.

Blue Square X / Waldorf Astoria St. PetersburgWatch on YouTube ↗

Architectural visualization from realtySTUDIO

My apprealtySTUDIOArchitectural visualization & marketing ↗

2023 onward / crea8or.STUDIO

Back to
visual storytelling.

I founded crea8or.STUDIO in 2023, then built realtySTUDIO in 2025, bringing AI, automation and real-time 3D to architectural visualization and marketing.

My work includes a sales-center application for Blue Square X and Waldorf Astoria St. Petersburg, built with Unreal Engine 5 and Cesium. It runs on touchscreen kiosks and large LED screens in the sales center.

Marc teaching a small group around a table — Teaching business owners to put the tools to work.

2026 onward / Praxis

Building it.
Teaching it.

I started Praxis in 2026 to build and maintain useful AI assistants, and teach business owners to use them. I’m a solo founder: I scope the work, build it and handle the handover and training. The experience comes from operating my own businesses.

I share what I’m building and testing in The Company Builder’s Manual, live classes, workshops and private team training.

A few other things I’ve made

Film & commercial work

Mine entrance in a scene from Dark Hollow

Feature film

Dark Hollow

Virtual production and AI effects.

Automotive commercial / TRG

Audi / Sewell

AI image-to-video work for TRG.

Watch on YouTube ↗

Virtual production / TRG

Charles Schwab

Virtual production sets for a series of TV commercials.

Watch on YouTube ↗

Let’s talk.