We know Plato is highly regarded among Neoplatonic mystics. His doctrine of knowledge as recollection, Ideal forms, human soul, love, transmigration or afterlife are congruent with mysticism. Now we also know that Plato was greatly influenced by Pythagoreans and this raises the question whether he was personally a mystic or just elaborated and modified Pythagorean ideas. I mean did he personally have mystical involvements or claim any visions, as Plotinus did?
I know of accounts of mystical vision attributed to him by Arab/Iranian medieval writers but it appears that these sources had confused him with Plotinus who does actually cite personal visions.