Chipmixer is the best known right now but there are also non-custodial options like Wasabi Wallet
Worth noting that we shouldn't confuse CoinJoining with Mixing. They both make your final outputs obfuscate, but there's an entire difference between them. If you mix your coins, you leave no footprints in the blockchain; you essentially receive outputs that have no connections with your activity.
ChipMixer is indeed a great mixer, but I believe you should read the available mixers and judge by yourself what's better for you:
2021 List Bitcoin Mixers Bitcoin Tumblers Websites.
The process might be different but it is still mixing. The developers of Wasabi and Samourai even describe it as mixing. Mixing itself isn't enough to hide your tracks. Chain analysis companies have been able to track users of ChipMixer as well as Wasabi. Post-mix behavior is always an important factor for maintaining privacy.