🔐 Authentication Comparison
Firebase Auth vs Memberstack
A detailed comparison to help you choose the right tool for your needs.
Last updated: 2026-02-06
Firebase Auth
Free up to 50k MAU (phone auth: 10k/mo free)
Strengths
- + 50,000 monthly active users free — most solo products never hit that ceiling
- + Google, Apple, GitHub, and 10+ social providers work out of the box
- + Plugs directly into Firestore, Cloud Functions, and other Google Cloud services
Weaknesses
- − Tied to the Google ecosystem — using Firebase Auth without other Firebase services feels awkward
- − Custom UI required — no pre-built login components like Clerk offers
- − Migrating user password hashes out of Firebase is possible but painful
Memberstack
From $25/mo
Strengths
- + Works with Webflow/Wordpress
- + Built-in Stripe integration
- + No-code friendly
Weaknesses
- − Depends on your site builder
- − Can get complex for advanced use
The verdict
Which one is right for you?
Choose Firebase Auth if you want
- → 50,000 monthly active users free — most solo products never hit that ceiling
- → Google, Apple, GitHub, and 10+ social providers work out of the box
Choose Memberstack if you want
- → Works with Webflow/Wordpress
- → Built-in Stripe integration
In depth
About each tool
Firebase Auth
Google's authentication service with generous free limits and tight integration across the Firebase ecosystem
Firebase Auth handles email/password, social login, phone auth, and anonymous users with minimal setup. Google gives you 50,000 MAU free for most auth methods, which is five times what Clerk or Auth0 offer. If you are already using Firestore or Cloud Functions, Auth plugs in with a single line of config.
The downside is that Firebase Auth is designed to keep you inside Google’s ecosystem. Using it as a standalone auth service — say, with a Postgres database and a Next.js app on Vercel — is doable but clunky compared to Clerk or Supabase Auth. You also need to build your own login UI, since Firebase only provides a basic drop-in widget (FirebaseUI) that looks dated. For solo founders already committed to Firebase, Auth is the obvious choice. For everyone else, evaluate whether you want that Google dependency.
Memberstack
Add memberships and payments to any website
Memberstack adds user accounts and payments to Webflow and Wordpress sites without code. Handles auth, gating, and Stripe billing.
Founded by Tyler Bell and Duncan Hamra, best friends since preschool. YC S20, powering $130M+ in membership revenue for 3,000+ companies.
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