Eurocircuits for NDA stuff. They are slow to work with and expensive, but I trust their integrity and they produce fully inside Europe.

Aisler is super fast and cheap, but I need to solder myself, so I use them for small interface boards

pcbway is in China, but I can send in my own components. I used them for example for an usb3+fpga+RAM base board. They are great for stock modules like USB interfaces, but have no NDA options.

jlcpcb is in China and cheap and fast, but you can only use components in their list. So I use them for larger batches of boards that I prototyped with aisler. Also no NDA option.