Any fishkeepers here? Saltwater or freshwater

[Silock]

I wouldn't put it with guppies. Bettas are fine with other fish, so long as the other fish don't have long fins. I mean, you can TRY it, but your results may vary. Notice that none of the fish I selected have long fins that might confuse the betta into nipping. I know my betta isn't aggressive and would probably be fine with guppies, but others may have different personalities that don't get along so well with long-finned fish.