Julia Computing is not a services company. There are commercial products built off of this stack which are the core of Julia Computing. For example, https://pumas.ai/ is a product for pharmacology modeling and simulation, and runs on the JuliaHub cloud platform of Julia Computing. It is already a big deal in the industry, with the quote everyone refers to "Pumas has emerged as our 'go-to' tool for most of our analyses in recent months" from the Director Head of Clinical Pharmacology and Pharmacometrics at Moderna Therepeutics during 2020 (for details, see the full approved press release from the Pumas.ai website). JuliaSim is another major product which is being released soon, along with JuliaSPICE publicly in the pipeline.

But indeed, Julia Computing differentiates itself from something like MATLAB or Mathematica by leveraging a strong open source community on which these products are developed. These products add a lot of the details that are generally lacking in the open source space, such as strong adherents to file formats, regulatory compliance and validation, GUIs, etc. which are required to take such a product from "this guy can use it" to a fully marketable product usable by non-computational scientists. I will elaborate a bit more on this at JuliaCon next week in my talk on the release of JuliaSim.