What are some compatible tank mates for bettas, specifically considering tetras?

Some compatible tank mates for bettas, especially when considering tetras, are peaceful fish that prefer similar water conditions. Tetras are a good option as they are generally peaceful and fast-moving, which can help reduce aggression from the betta. Other suitable tank mates could include rasboras, corydoras catfish, and snails. It's important to monitor the behavior of all fish in the tank and be prepared to separate them if any aggression occurs.