Question: I'm looking for a solution that allows users to log in to web3 applications without passwords, what options are available?

If you're looking for a solution that lets people log in to web3 apps without passwords, Dynamic is a good option. It supports passwordless login with Passkeys, as well as other features like non-custodial access, support for multiple cryptocurrency chains and built-in on/off ramps for converting fiat currency into cryptocurrency. It's highly customizable, with a user-friendly dashboard and support for a variety of use cases like NFT marketplaces and DeFi apps.

Another good option is MojoAuth, a passwordless authentication service for web and mobile apps. MojoAuth removes password vulnerabilities, improves user experience and can be integrated with a variety of industries including ecommerce and healthcare. It offers white-label login forms and a full suite of APIs for developers to manage user identities securely.

Auth0 is another good option, offering secure access to users with features like Universal Login, Single Sign On and Multifactor Authentication. It supports multiple languages and frameworks with more than 30 SDKs and Quickstarts, which means it's adaptable for managing customer identities across many industries. It's free to get started with, so you can experiment before you go big.

If you're looking for a more complete user management system, check out Clerk. Clerk provides a collection of embeddable UI components and flexible APIs for authentication and user management. It supports multifactor authentication, secure password authentication and a variety of integration options with popular frameworks, so it's good for a broad range of apps.