TechShop is great for hobbyists with some money to spare (there are a lot of hidden costs, both time and money, that they don't tell you about), but terrible for professionals. Their machines are regularly not working for days at a time, and I've had experience with multiple locations so this is indicative of the company as a whole.
If you want to manufacture with plastic, I'd be surprised if there was any reason to do it outside of China. If you're working with metal, it's a much trickier question.
Along with EMachineShop, there's also Plethora. I've never used Plethora and it seems incredibly limited, but they've been around a few years and have a ton of people on staff (which can't be cheap) so they must be getting decent business.
If you want to manufacture with plastic, I'd be surprised if there was any reason to do it outside of China. If you're working with metal, it's a much trickier question.
Along with EMachineShop, there's also Plethora. I've never used Plethora and it seems incredibly limited, but they've been around a few years and have a ton of people on staff (which can't be cheap) so they must be getting decent business.