How they compare
Both have free live shows.
Stripchat has a huge audience, strong category filters, a fast mobile site and live VR cam rooms, with tokens (about $0.08–0.11 each at the time of writing) for tips and privates. Private shows get pricey, and there are lots of upsell prompts.
SinParty is a newer platform that puts live cams and creator content in one place, with a modern, clean design. Its audience is smaller and it's less established.