Companion fish for your Betta? Just be wary it doesn't always work out: My Bettas killed my ramshorn snails and ate all my Shrimp, and I had two different Betta fish. But ,still, here's a list of maybes:

This article from FishLab provides a comprehensive list of 50 compatible tank mates for Betta fish, emphasizing the importance of tank size, peaceful tank mates, and proper setup to minimize aggression. It covers a variety of fish and invertebrates suitable for both male and female Bettas, offering guidelines for different tank sizes and highlighting the need for a well-planned aquarium to ensure a harmonious community tank.