Can a object without a rigidbody be triggered by a trigger?

If I move Object1 into Object2 is there a way to have Object2 react without having a rigidbody on it? It seems the triggers only work when colliding with a rigidbody. My objects cannot be rigidbody but must still interact with each other. I not sure if any of what I said made any sense but I don’t know how else to explain it.

One of them must have a rigidbody. You can add a rigidbody to your trigger, and it should detect other colliders even if they don’t have a rigidbody (at least that’s what the docs say at OnTriggerEnter - I can’t test this right now). CharacterController’s are detected by triggers too, even if none of them has a rigidbody (this I’ve tested a lot).