Yes, dwarf gouramis eat other fish. Dwarf gouramis are predatorial in nature and will try to eat any small fish that can fit in their mouths. They might even try to eat similarly-sized fish that are sick or dying.
However, that doesn’t mean you can’t keep dwarf gouramis with other fish. Dwarf gouramis actually fare well in community tanks, as long as their tank mates have similar sizes and temperaments to them. Also, since they’re slow-swimmers, dwarf gouramis are unlikely to eat fast-swimming fish.
Here are some great fish you can keep with dwarf gouramis: