Almost all campaigns I ran I'd have them start level 3-5 depending on what stories I wanted to tell. Pathfinder 1 the first couple levels are trash anyways and I personally felt like I didn't have much interest with my own characters until I could see their unique abilities start to come online, so that's where I liked to start players in my own campaigns

The GURPS equivalent of D&D/Pathfinder starts you out at the equivalent of level 5-7 by default. There's options for lower powered delvers, but the default assumption is that people want to play established characters.