Sign in with Slack

In plain words

Sign in with Slack is a login solution that allows website users to authenticate using their Slack credentials. It streamlines account access by leveraging existing Slack identities rather than requiring separate usernames and passwords. The tool integrates with Slack's API and messaging platform, making it useful for teams and communities already using Slack. It's designed for site developers who want to simplify user registration and login processes while maintaining security through Slack's authentication system.

written from the facts on this page · September 2026

From the sources

Sign in with Slack helps users log into your service using their Slack profile. The Sign in with Slack flow will redirect users to the right Slack URL. Slack will send users back to your service, along with the information your service needs. The flow is based on the OpenID Connect standard , built on top of OAuth 2.0 . The modern Sign in with Slack flow works with any package that successfully implements this standard. OpenID maintains a list of certified implementations of the OpenID Connect standard . We recommend you make use of one of these packages to take care of the boilerplate surrounding OAuth. If you already have an existing Sign in with Slack app that uses identity.* scopes, you…from docs.slack.dev

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