Tag8 and MyTags are not the same kind of product, and it helps to say so up front. Tag8 covers a lot of ground — scannable QR and NFC tags for wallets, bags, keys and pets, plus battery-powered Bluetooth trackers that report proximity. If you want a device that pings a nearby phone, that is a real strength and a QR tag cannot match it.
MyTags is narrower on purpose. It is a privacy-first QR lost-and-found tag. The whole product is built around one promise: a finder can contact you without ever learning who you are or how to reach you off-platform. If that promise is what you came for, the comparison below is where MyTags pulls ahead.