Originally Posted by Hawke
There are clearly 8 Origins in the game that are pretty far progressed in development + others have found 3 being mentioned once but with no additional data, so I guess this might be included or not.
and here https://www.reddit.com/r/BaldursGate3/comments/jd1qsq/highlights_from_kevin_vanords_stream/ we get the confirmation that there will be 8 companions just like I said.

Well that would be massively disappointing if there's only 8 (especially with what we know of the 8). Though the link does say 8, maybe more. It also says more than DoS2 and less than BG2, which is basically anymore between 7-17 companions.