According to the official Ory documentation, the default password hasher for Ory Kratos is BCrypt if no specific configuration is provided: > Per default, passwords are hashed using BCrypt. You can configure the BCrypt hasher using the following options: > >

> hashers:   >   algorithm: bcrypt   >

> > [Source: Passwords settings](https://www.ory.sh/docs/self-hosted/kratos/configuration/password) Additionally, the documentation for importing hashed passwords also states: > By default Ory uses a password policy that follows the [Digital Identity Guidelines](https://pages.nist.gov/800-63-3/) established by the [National Institute of Standards and Technology (NIST)](https://www.nist.gov/). > > [Source: Password policy](https://www.ory.sh/docs/kratos/concepts/security#password-policy) There is no mention in the provided knowledge sources of Argon2 being the default hasher unless it is explicitly configured. If you are seeing Argon2 as the default in the code, it may be due to a recent change not yet reflected in the documentation, or a specific context in your codebase. Based on the documentation, BCrypt is the default unless otherwise specified.