Firebase Authentication

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

Sanity

Developer-first headless CMS with real-time collaboration

Firebase Authentication vs Sanity: 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 Sanity goes after "developer-first headless cms with real-time collaboration" — so the right pick depends on which problem you're actually solving. Both use freemium pricing, but Firebase Authentication charges per mau while Sanity charges per seat — a meaningful difference for larger teams. Firebase Authentication (founded 2011) has had more time to build out its ecosystem and integrations, while Sanity (2017) tends to move faster on modern UX and newer workflows.

At a glance

	Firebase Authentication	Sanity
Our score	76/100	82/100
Starting price	Free	Free
Free tier	Yes	Yes
Best for	Google-backed auth with generous free tier for mobile and web	Developer-first headless CMS with real-time collaboration

Pricing comparison

Firebase Authentication

Free tier available

Spark (Free)Free

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

Pricing verified 2026-04-16

Sanity

Free tier available

FreeFree

Growth$15/mo

Enterprise$null/mo

Pricing verified 2026-04-16

Calculate your cost

How many developers?10

1500

Firebase AuthenticationUnknown

Contact sales

SanityGrowth

$150/mo

$1,800/yr

Try Firebase Authentication free →Try Sanity free →

Feature comparison

core

Feature	Firebase Authentication	Sanity
Email/password	Yes	No
Google OAuth	Yes	No
Apple OAuth	Yes	No
Phone SMS	Yes	No
Anonymous auth	Yes	No
Content modeling (schema)	No	Yes
GROQ query language	No	Yes
Real-time collaboration	No	Yes
Custom Studio	No	Yes
Portable Text	No	Yes

advanced

Feature	Firebase Authentication	Sanity
Multi-tenancy	Blaze	No
SAML SSO	Blaze ($0.015/MAU)	No
Custom claims	Yes	No
App Check	Yes	No
Blocking functions	Yes	No
TypeScript support	No	Yes
Live preview	No	Yes
Scheduled publishing	No	Yes
AI Assist	No	Yes
Image transformations	No	Yes

integrations

Feature	Firebase Authentication	Sanity
Firebase (all products)	Yes	No
Google Cloud	Yes	No
Flutter	Yes	No
Android/iOS SDKs	Yes	No
Web SDK	Yes	No
Vercel	No	Yes
Next.js	No	Yes
Astro	No	Yes
Shopify	No	Yes
Cloudflare	No	Yes
Algolia	No	Yes

Ratings breakdown

Firebase Authentication

Ease of use

8/10

Value for money

9/10

Features

7/10

Support

6/10

Sanity

Ease of use

7/10

Value for money

8/10

Features

9/10

Support

8/10

What the data tells us

Key capabilities you'd miss

Choosing Firebase Authentication means going without Content modeling (schema), GROQ query language, Real-time collaboration (which Sanity offers). Choosing Sanity 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

Sanity (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 Sanity if...

You want a free tier to get started
You value powerful features over simplicity
Getting strong value for money is a priority

Try Sanity free →

Frequently asked questions

Is Firebase Authentication or Sanity better?

Sanity scores 82/100 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 Sanity scores 7/10.

How much does Firebase Authentication cost compared to Sanity?

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

Does Firebase Authentication or Sanity have a free plan?

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

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