Let your users log in with Google, Microsoft, Slack, QuickBooks, Salesforce, ... 141 in total. All in 2 minutes and without building any OAuth2 flows.

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Unified removes the complexity of integration authorization so you can focus on building your product, not managing OAuth flows.
Just redirect your user to our unified Authentication URL, and we will return their emails so that you can log or register them in your application.
See documentation
Login users from 141 platforms, without building auth flows, handling tokens, or wiring up individual SDKs.
Simple Auth Redirect
No SDKs, no embedded UI—just redirect users to a single URL and receive their verified emails and name in the callback. Sample code provided for React, Vue, and Angular, plus stock provider logos, button colors and names.
Comprehensive Auth Flows
Unified handles all variations of OAuth2 flows, API tokens, and integration-specific authorization methods — so you don't have to.
OAuth2 Credential Guides
Step-by-step guides to get your own OAuth 2 credentials fast.
Enterprise-grade security
SOC 2 compliant. No data storage or caching. Keep API credentials (client secrets, API tokens) locked down in your own secrets manager (AWS, GCP, Azure, or HashiCorp Vault).
Authorize Across 141 Integrations
From Google and Microsoft to Slack, Salesforce, QuickBooks, and BambooHR. Unified.to supports more identity providers than Clerk, Supabase, or Auth0.
No Access Token Storage
Unified.to returns verified identity info, without requiring token handling or session management.