🔐 Authentication Comparison
Lucia vs Stytch
A detailed comparison to help you choose the right tool for your needs.
Last updated: 2026-02-06
Lucia
Free and open source
Strengths
- + Completely free, no MAU limits, no vendor lock-in — it is just a library
- + Works with any database (Postgres, MySQL, SQLite, MongoDB) and any framework
- + Tiny footprint — no external services, your auth data stays in your own database
Weaknesses
- − You build everything yourself — no pre-built login UI, no hosted dashboard
- − Requires solid understanding of sessions, cookies, and auth security
- − Maintained primarily by one developer — smaller bus factor than corporate-backed tools
Stytch
Free up to 25 orgs or 1k MAU, from $99/mo
Strengths
- + Purpose-built for passwordless — magic links, OTPs, passkeys, and biometrics
- + Fraud detection (device fingerprinting, bot detection) included in the platform
- + Clean API design with SDKs for React, Next.js, Python, Go, and more
Weaknesses
- − Paid plans start at $99/mo — expensive compared to Clerk ($25/mo) and Auth0 ($23/mo)
- − Smaller ecosystem and community than established auth providers
- − Traditional email/password auth feels like an afterthought
The verdict
Which one is right for you?
Choose Lucia if you want
- → Completely free, no MAU limits, no vendor lock-in — it is just a library
- → Works with any database (Postgres, MySQL, SQLite, MongoDB) and any framework
Choose Stytch if you want
- → Purpose-built for passwordless — magic links, OTPs, passkeys, and biometrics
- → Fraud detection (device fingerprinting, bot detection) included in the platform
In depth
About each tool
Lucia
Lightweight open-source auth library that gives you full control over your authentication logic
Lucia is auth stripped down to its essentials. It is a TypeScript library that handles session management and gives you helpers for password hashing, OAuth, and token generation. There is no hosted service, no dashboard, no per-user pricing — just code that runs in your app, storing sessions in whatever database you already use.
This makes Lucia the opposite of Clerk or Auth0. You get maximum control and zero recurring costs, but you write more code. You need to build your own login forms, handle email verification flows, and set up OAuth callbacks yourself. For developers comfortable with auth concepts, Lucia is rewarding — your auth is simple, portable, and costs nothing at any scale. For solo founders who want auth done in an afternoon without thinking about security details, a managed service like Clerk or Firebase Auth is a safer bet.
Stytch
Passwordless authentication API focused on magic links, OTPs, and passkeys
Stytch is built around the idea that passwords are a liability. Instead of email/password as the default, it leads with magic links, one-time passcodes, passkeys, and biometric auth. The API is well-designed — you can have passwordless login working in under an hour. It also bundles device fingerprinting and bot detection, which most competitors charge extra for or do not offer.
The catch is pricing. The free tier covers 1,000 MAU or 25 organizations, but the jump to paid is $99/month — steep for a solo founder who just needs basic auth. If your product specifically benefits from passwordless (fewer support tickets, higher conversion on sign-up), Stytch pays for itself. If you just need standard social login and email/password, Clerk or Firebase Auth give you more MAU for less money.
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