Is it a B2B or B2C product that you're building? What are the authentication methods you want to support? Do you only require authentication or also authorizati

Is it a B2B or B2C product that you're building? What are the authentication methods you want to support? Do you only require authentication or also authorization or session management? I think answering these questions first will help you to find a suitable solution in this space, as each provider has different strengths and weaknesses depending on your use case.