Authentication

A practical SaaS authentication checklist - password hashing, session and refresh-token rotation, 2FA, RBAC, rate-limiting and audit logging - with how FastStaq implements each.

Add authentication to Next.js with Supabase Auth - client setup, sign-up/sign-in, server-side sessions with SSR, and RLS - plus when owning your auth is the better call.

Implement RBAC in Next.js - model roles and permissions, assign roles, and enforce permission checks in middleware and on the server - with a data-driven model that scales.

Protect Next.js routes with middleware - read the session, redirect unauthenticated users, scope with a matcher, and gate by role - plus where to enforce auth server-side.

Build an accessible Next.js sign-in page - form UI, server submit, safe redirects, and error states - with the accessibility and security details done right.

Implement magic link (passwordless) authentication - generate a single-use token, email the link, verify it, and start a session - with the security rules that matter.

The best Clerk alternatives in 2026 - Auth0, Better Auth, Supabase Auth, NextAuth/Auth.js, and building your own - with a comparison table and how to choose.

Better Auth vs Clerk - an open-source self-hosted auth library vs a hosted provider - covering control, cost at scale, and setup, with a clear verdict.

Auth0 vs Clerk in 2026 - pricing, developer experience, features, and lock-in, with a clear verdict by use case and a third own-your-auth option.

Add Auth0 to Next.js - install the SDK, set env vars and the callback, read the session, and protect routes - plus when you might not need an auth provider at all.

The 7 best Auth0 alternatives in 2026 - Clerk, Supabase Auth, Firebase Auth, Keycloak, SuperTokens, WorkOS, and owning your auth - compared by hosting, DX, and pricing.

How Next.js authentication works in 2026 - sessions, OAuth, magic links, and route protection - plus when to build your own vs use Auth.js, Clerk, or Auth0.