Firebase Authentication

Google-backed auth with generous free tier for mobile and web

Supabase

Open-source Firebase alternative with Postgres

Firebase Authentication vs Supabase: Full Comparison (2026)

Pricing, features, scores, and a clear verdict on which one is right for you.

The bottom line

Firebase Authentication positions itself as "google-backed auth with generous free tier for mobile and web" while Supabase goes after "open-source firebase alternative with postgres" — so the right pick depends on which problem you're actually solving. Both use freemium pricing, but Firebase Authentication charges per mau while Supabase charges per project — a meaningful difference for larger teams. Firebase Authentication (founded 2011) has had more time to build out its ecosystem and integrations, while Supabase (2020) tends to move faster on modern UX and newer workflows.

At a glance

	Firebase Authentication	Supabase
Our score	76/100	88/100
Starting price	Free	Free
Free tier	Yes	Yes
Best for	Google-backed auth with generous free tier for mobile and web	Open-source Firebase alternative with Postgres

Pricing comparison

Firebase Authentication

Free tier available

Spark (Free)Free

Blaze (Pay-as-you-go)$null/mo

Pricing verified 2026-04-16

Supabase

Free tier available

FreeFree

Pro$25/mo

Team$599/mo

Pricing verified 2026-04-16

Calculate your cost

How many developers?10

1500

Firebase AuthenticationUnknown

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SupabaseUnknown

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Try Firebase Authentication free →Try Supabase free →

Feature comparison

core

Feature	Firebase Authentication	Supabase
Email/password	Yes	No
Google OAuth	Yes	No
Apple OAuth	Yes	No
Phone SMS	Yes	No
Anonymous auth	Yes	No
PostgreSQL database	No	Yes
Authentication	No	Yes
Storage	No	Yes
Edge Functions	No	Yes
Realtime subscriptions	No	Yes

advanced

Feature	Firebase Authentication	Supabase
Multi-tenancy	Blaze	No
SAML SSO	Blaze ($0.015/MAU)	No
Custom claims	Yes	No
App Check	Yes	No
Blocking functions	Yes	No
Row-level security	No	Yes
Database webhooks	No	Yes
pgvector (AI embeddings)	No	Yes
Branching	No	Pro+
Foreign data wrappers	No	Yes

integrations

Feature	Firebase Authentication	Supabase
Firebase (all products)	Yes	No
Google Cloud	Yes	No
Flutter	Yes	Yes
Android/iOS SDKs	Yes	No
Web SDK	Yes	No
Next.js	No	Yes
React	No	Yes
Prisma	No	Yes
Drizzle	No	Yes
Vercel	No	Yes

Ratings breakdown

Firebase Authentication

Ease of use

8/10

Value for money

9/10

Features

7/10

Support

6/10

Supabase

Ease of use

8/10

Value for money

9/10

Features

9/10

Support

8/10

What the data tells us

Key capabilities you'd miss

Choosing Firebase Authentication means going without PostgreSQL database, Authentication, Storage (which Supabase offers). Choosing Supabase means losing Email/password, Google OAuth, Apple OAuth. These are the features that typically drive the final decision — check whether your workflow depends on any of them before committing.

What company size tells you

Supabase (201-500 employees) has the engineering bench to ship features across many fronts but may iterate slower on individual requests. Firebase Authentication (100,000+ employees) typically ships faster on its core product but may lag on peripheral features. Consider which matters more for your roadmap.

Choose Firebase Authentication if...

You want a free tier to get started
You value an intuitive, easy-to-use interface
Getting strong value for money is a priority

Try Firebase Authentication free →

Choose Supabase if...

You want a free tier to get started
You value an intuitive, easy-to-use interface
Getting strong value for money is a priority

Try Supabase free →

Frequently asked questions

Is Firebase Authentication or Supabase better?

Supabase scores 88/100 compared to Firebase Authentication's 76/100 on VendorVS. However, the best choice depends on your needs — Firebase Authentication excels at ease of use (8/10) while Supabase scores 8/10.

How much does Firebase Authentication cost compared to Supabase?

Firebase Authentication starts at free (free tier available). Supabase starts at free (free tier available). Firebase Authentication is the more affordable option.

Does Firebase Authentication or Supabase have a free plan?

Yes, both Firebase Authentication and Supabase offer free tiers, so you can try each before committing to a paid plan.

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