0xbow's privacy solution is quite interesting, striking a balance between privacy and regulation. They just raised $3.5 million from Coinbase, Balaji, and MetaMask co-founders. The solution is based on a paper published in 2023 by Vitalik, Ameen, and others. Their Privacy Pools have already launched on the mainnet. The front-end experience is a bit tricky (you need to back up a new seed phrase), but at least you can give it a try.