bcrypt and HMAC fill different roles and have different security properties: bcrypt is a key-derivation function, and HMAC is a message authentication code. The

bcrypt and HMAC fill different roles and have different security properties: bcrypt is a key-derivation function, and HMAC is a message authentication code. They're not comparable. In particular, HMAC should be used with a high-quality key; bcrypt is for deriving high-quality keys from lower-quality keys.