Erica Xu & Shida Li
1 Mac app on Kitsmith
Obsidian’s own About page credits Shida Li (@licat, CTO) and Erica Xu (@silver, COO) as co-founders — "Erica started Obsidian in 2020 to build the perfect note-taking app for her notes." The same page states the company is "100% supported by our users, not investors."