Excelsecu
Excelsecu, based in Shenzhen, manufactures FIDO2 keys both under their own eSecu brand and as an OEM for other vendors. Several keys sold under names you might recognise on Amazon are made by Excelsecu, and the company’s own eSecu line covers fingerprint, NFC, Bluetooth, and card form factors at value pricing.
The OEM relationships are not always disclosed by the rebranding vendors, so it is worth treating Excelsecu’s published specs as a useful reference even if you are buying a different brand.