SoundHound AI's growth rate rivals Palantir's.Palantir Technologies (PLTR +3.35%) has been one of the best-performing AI investments over the past few years. It won massive contracts in commercial and government businesses, and has become a building block for deploying AI software at an enterprise scale. However, the market has gotten extremely excited about the stock, causing it to get overheated and overvalued.I think there's one under-the-radar AI stock could easily outperform it over the next decade. So ...