Groq is very different from TPUs. The difference in memory should be a big clue. (Groq using SRAM built into each compute unit, vs TPUs using HBM more similarly to GPUs)

The founder created TPUs at Google.

> Prior to founding Groq, Jonathan began what became Google’s Tensor Processing Unit (TPU) as a 20% project where he designed and implemented the core elements of the first generation TPU chip.