mirador

Agreed, was unaware that there was a gold rush, anyone know about specific companies in this space that are still active?

Just be upfront about this situation. Come up with a cap table that includes everyone that brings in non-zero value, and fairly allocate equity based on what each individual brings to the team. There's no reason to split 50/50 if 2 people are not contributing equally, might be closer to 95/5. Make sure you can defend any equity amount based on objective reasons.

Agreed, that's the way I've seen these companies. AWS has truly become a layer that powers a huge part of the applications on the web.

Dropbox and Heroku are built on top of AWS (amongst thousands of other companies)

No surprises here, welcome to the internet!