As a co-founder (Australian citizen) of a Series A funded software startup, is there an easy decision matrix on whether to apply for an E3 or O1 visa? It seems like I don't fully fit into either category.

E-3s are super quick and easy so this is definitely the first option to explore. But it requires a bachelor's degree or its equivalent in a field related to the job. And being a founder/owner can complicate the process but doesn't automatically mean an E-3 isn't an option. There's no helpful decision matrix. If you'd like, send me your resume and schedule a call and I can tell you which option to pursue.