Ask HN: Startups outsourcing initial development

Can someone name any success stories of startups that have outsourced the development of their first prototypes/alpha/beta versions and that has worked out well for them?

The common thinking (which I fully agree to) has been that startups should never outsource, be in the same room full time and have technical/development co-founders. But are there well-known cases of when a spread team, especially with paid outsourced development (sometimes even in another country) has worked out well?

We are a product development team based in Estonia (have launched multiple startups ourselves and seen everything) and are now toying with the idea of doing some first version prototyping for US startups or business founders.

Considering the current high cost level and toughness of finding tech talent in especially the Silicon Valley, could the lower cost level and good availability of great tech talent in Estonia potentially be of interest to some?