I work with Rosti at Sanity and helped get the word out on this. The core problem is that logos vary wildly in aspect ratio, pixel density, and visual weight, so lining them up at the same height or width never looks right.

Rosti's approach uses three things: proportional normalization based on aspect ratio, pixel density analysis (so a dense wordmark doesn't visually overpower a thin logomark), and a center-of-mass calculation for optical alignment. The perceptual sizing math builds on Dan Paquette's earlier work.

The core normalization logic is plain JS with no React dependency: https://github.com/sanity-labs/react-logo-soup/blob/main/src...

Someone already forked it into a framework-agnostic version: https://github.com/auroris/logo-soup

Rosti is around if there are questions about the density compensation or optical alignment math.