Why I'm building yet another UML tool in 2026 (opens in new tab)

Let me get the obvious objection out of the way. PlantUML exists. Mermaid renders natively on GitHub. draw.io is free and works. Enterprise Architect, MagicDraw, Rhapsody and Papyrus cover the heavy end. By any reasonable count, the world has somewhere north of forty UML tools, and most teams complain about exactly one of them: the one they have to use. So why build another? The honest answer has three parts. I'll walk through each — including the parts where my reasoning is shaky, and the on...