Lucia Has a Free Auth Library — Simple Authentication Without Auth-as-a-Service

A developer evaluated Auth0 ($23/month for 1,000 users), Clerk ($25/month), and Firebase Auth (free but vendor-locked). For a side project with 50 users, all felt like overkill. Lucia is a free, lightweight auth library. Session-based authentication that YOU control. No external service, no vendor lock-in, no surprise pricing. What Lucia Offers for Free Session Management - Secure cookie-based sessions Database Agnostic - Works with any database (Prisma, Drizzle, raw SQL) Framework Agnostic - Next.js, SvelteKit, Astro, Express, Hono OAuth - GitHub, Google, Discord, any OIDC provider Password Hashing - Built-in Argon2id/bcrypt Two-Factor - TOTP support for 2FA TypeScript - Full type safety Lightweight - No bloat, no magic, just functions Quick Example import { Lucia } from ' lucia ' import { PrismaAdapter } from ' @lucia-auth/adapter-prisma ' const lucia = new Lucia ( new PrismaAdapter ( prisma . session , prisma . user )) // Create session const session = await lucia . createSession (