---
canonical: "https://www.softatlas.io/prelude-2/products/auth"
name: "Auth"
provider: "Prelude"
category: "Security & Compliance / Identity & Access Management / Access Management & SSO"
review_count: 0
ai_powered: false
website: "https://prelude.so/auth"
updated: "2026-10-05"
---

# Auth

By [Prelude](/prelude-2.md)

A full authentication stack providing persistent trust with signup, login, social, and password management in one API.

## Features
- Create persistent trust sessions for returning users
- Integrate phone verification signals into authentication decisions
- Detect bots and agents through network fingerprinting
- Enforce proof of possession tokens with automatic revocation
- Protect OAuth flows with PKCE to prevent replay attacks
- Enable enterprise SSO with SAML integration
- Implement step-up security for critical actions
- Block disposable numbers and known fraud patterns at signup

## Built for
DEVELOPERS, OPERATIONS, EXECUTIVES

## Alternatives on Soft Atlas
The closest alternative to Auth on Soft Atlas is [Supabase Authentication](/supabase/products/supabase-authentication.md).

Source: https://www.softatlas.io/prelude-2/products/auth