[twunde]

There are a few competitors: Google Titan, Thetis come to mind plus traditional smartcards. Some of the competitors only support FIDO/U2F, meaning that a number of applications like LastPass that support OTP or Smartcard won't work (if you're interested Yubikey's Security Key only supports those two protocols and only costs $20). Yubikey's build quality tends to be superior and they've got a nice plug and play UX. For many IT departments, it's easy to justify an extra $5-$10 a unit if there is minimal support needed and it's unlikely to need to be replaced due to breakage (lost devices yes, breakage no). Anecdotally I've got an older generation yubikey that appears to still work after 6-7 years