Logarithmus

Logarithmus is the Zürich engineering consultancy of Rafael Kallis: fullstack and blockchain development, data science, and academic work, built for clients in financial technology.

The occasion was structural: the company’s conversion to a GmbH. The tension was harder: a one-person consultancy whose buyers want institutional credibility, run by a practitioner whose real character is academic and mathematical.

The identity answers with restraint. The mark is a plotted logarithmic curve, drawn and labelled like the mathematics it stands for; Helvetica Neue keeps everything else quiet; none of the category clichés appear. The maths is the substance, never the texture.