Insects
Insects are the predators of wasps that eat wasps. Predators including dragonflies, centipedes, hoverflies, beetles, spiders, moths, praying mantis, and robber flies catch a lot of wasps.
Spiders use unique hunting methods to catch wasps. They hunt these insects using their webs, then slowly consume them thereafter.
Robber flies use their poison to paralyze and then devour wasps that have been stung by them. It's interesting how they capture these wasps as they fly.
For dragonflies, they use a variety of techniques to catch and consume wasps. As their prey swims or floats past them, they calmly lay down to watch them. Once they pass this stage, they extend their lower jaws to snare the wasps and then eat them. Adult dragonflies, on the other hand, hunt in a quite different manner. To eat their prey in midair, they fly with their mouths open.
A praying mantis consumes hornets and engages in violent combat with its victim. The mantis pounces on hornets as they fly by and holds them in place with its long front legs. Tragically, it pulls the hornet's head off to get to its brain, which it eats.