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Side-by-side comparison · Databases & Backend

Clerk vs Firebase

Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.

Best overall

Clerk

4.4

From $20/mo

Firebase

4.1

From Pay as you go

Comparing 2 tools. Add one more if you like.

At a glance

Best overallEasiest to use

Pick it if: Anyone building a web or mobile app who needs user accounts and logins without writing them from scratch.

Pick it if: Teams building mobile or real-time apps, especially if you already live in Google's world.

Overview

AttributeClerkFirebase
In one lineReady-made sign-up, login and user accounts you can add to an app in minutes.Google's backend for mobile and web apps, with logins, data and hosting in one.
Pricing modelFreemiumFreemium
Starting price$20/moPay as you go
Free plan Yes Yes
Works with Claude Code Yes Yes

Rating breakdown

Our scores out of 5. The higher bar in each row is highlighted.

AttributeClerkFirebase
Overall rating4.4Winner4.1
Ease of useHow quickly someone non-technical gets value from it.
4.5
3.5
FeaturesHow completely it covers its own job, and how well the pieces fit together.
4.5
4.5
Output qualityHow good the results are before you fix them.
4.5
4.0
Value for moneyWhat you get for the price, including the free plan.
4.0
4.0
Speed & reliabilityHow fast it is and how often it falls over.
4.5
4.5

Feature comparison

A tick means it does this today. A dash means we haven't checked.

AttributeClerkFirebase
Access & platform
Free plan Yes Yes
Mobile app No No
Desktop app No No
Browser extension No No
API access Yes Yes
Teams & business
Team workspace Yes Yes
Enterprise plan or SSO Yes Yes
Connects to other apps Yes Yes
Open source or self-hosted No No
AI abilities
Works with your files No Yes
Understands images– Yes
Makes images No Yes
Makes video No No
Writes code No Yes
Runs agents or automations– Yes
Learns your brand or style– No
Works in many languages Yes–
Capabilities score6/ 1710/ 17

Pricing

Plans as listed on each vendor's site when we last checked. Confirm before you buy.

AttributeClerkFirebase
Plans

Hobby

Free

New apps and side projects.

SparkOur pick

Free

Early projects and apps with a small audience.

ProOur pick

$20/mo billed yearly, or $25 monthly

Apps with paying customers.

Blaze

Pay as you go, no monthly fee

Anything that might grow past the free quotas.

Business

$250/mo billed yearly, or $300 monthly

Growing companies that need compliance paperwork.

Enterprise

Custom

Large companies with strict security needs.

Which plan to pickBuild on Hobby. It's enough until you have customers who care about the Clerk branding or need multi-factor login, then move to Pro. Business only matters when a customer asks for a SOC 2 report.Spark is enough until real users arrive. Move to Blaze when you need Cloud Functions or you're close to a quota, and set a budget alert the moment you do. There's no middle tier, so your bill goes straight from nothing to usage based.

Key features

AttributeClerkFirebase
Standout features
  • Prebuilt screens
  • Every login method
  • Organisations
  • Bot and fraud protection
  • Clerk Billing
  • Firestore
  • Authentication
  • Hosting
  • Cloud Functions
  • Messaging and analytics
  • Firebase MCP server

Pros and cons

AttributeClerkFirebase
Pros
  • Fastest way to add polished logins to an app
  • 50,000 free monthly users per app
  • Covers social, passwordless, passkeys and SMS
  • Team accounts and billing built in
  • AI coding tools know it well
  • Proven at huge scale for over a decade
  • The best mobile tooling in this category
  • Live sync and offline support built in
  • Generous free plan with no card required
  • Push notifications, analytics and hosting in one place
Cons
  • Removing branding and multi-factor login need Pro
  • Enterprise SSO connections cost $75 a month each after the first
  • Your user accounts live with Clerk, so moving away takes work
  • SMS codes cost extra per message
  • Document storage makes reporting and complex queries awkward
  • Usage-based costs can spike with traffic
  • Hard to move off, since nothing else uses Firestore's format
  • Google has retired products before, most recently Firebase Studio

Who each one is for

AttributeClerkFirebase
Best for
  • Adding sign-up and login to an app
  • Google, Apple and passwordless sign-in
  • Apps where customers have team accounts
  • Charging subscriptions inside your app
  • Mobile app backends
  • Live-updating data and chat
  • Sign in with Google or Apple
  • Push notifications
You'll find it used by
  • Indie builders
  • Startups
  • SaaS companies
  • Developers
  • Mobile developers
  • Startups
  • Google shops
  • Hobbyists

Questions people ask

Which is better, Clerk or Firebase?

Clerk scores highest overall in our ratings (Clerk 4.4/5 and Firebase 4.1/5). Clerk is best for adding sign-up and login to an app and Google, Apple and passwordless sign-in. Firebase is best for mobile app backends and live-updating data and chat.

Which is cheaper, Clerk or Firebase?

Clerk: There's a free plan, and paid plans start at $20/mo. Firebase: There's a free plan, and paid plans start at Pay as you go.

Which is easier to use, Clerk or Firebase?

Clerk rates highest for ease of use in our scores. Anyone building a web or mobile app who needs user accounts and logins without writing them from scratch.

How we compare

Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.

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