Both lend to consumers. I believe they also target the same type of consumer–millenials with poor credit, or at least low FICO scores. I confess I don’t know much about Affirm, but I don’t think it’s controversial to say they are linked. If you Google the two names you will see several comparisons.
If someone wants to tell me why Affirm’s results are unlikely to foretell anything for Upstart, I’d be grateful, but I’m a bit more nervous today about my 3% stake in UPST, even though I love what the company is trying to accomplish (which by the way was never the case with Affirm).