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Bubble vs Firebase Realtime Database

Bubble logo

Bubble

No-Code

No-code platform for building web and mobile applications visually

From
Free
Free plan
Yes
Visit BubbleFull review
Firebase Realtime Database logo

Firebase Realtime Database

Databases

Store and sync data in real-time across all clients

From
Free
Free plan
Yes
Visit Firebase Realtime DatabaseFull review

The short version

  • Firebase Realtime Database is a cloud-hosted NoSQL database.
  • Bubble is free; Firebase Realtime Database starts at $5/mo.
  • Only Bubble lists visual app editor; only Firebase Realtime Database lists real-time Sync.
  • Where Bubble falls short: apps are tied to Bubble's proprietary runtime, making migration to another stack difficult if the platform is later outgrown.
  • Where Firebase Realtime Database falls short: the no-cost Spark plan caps storage at 1 GB, downloads at 10 GB per month and simultaneous connections at 100.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Bubble and Firebase Realtime Database actually diverge.

Attributes where Bubble and Firebase Realtime Database differ
AttributeBubbleFirebase Realtime Database
CategoryNo-CodeDatabases

Identical on both: starting price (Free), pricing model (Freemium), free tier (Yes), platforms (Web, iOS, Android).

Not yet recorded: founded for Bubble.

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Bubble

  • Visual app editor
  • Built-in database
  • Visual workflow logic
  • Plugin marketplace
  • Responsive design engine
  • Custom domains

Only in Firebase Realtime Database

  • Real-time Sync
  • Offline Support
  • JSON Storage
  • Security Rules
  • Data Validation
  • Multi-platform SDKs
  • Scalable
  • Firebase Auth

What people use each for

The jobs each tool is most often brought in to do.

Bubble

  • Building MVPs and startup web apps without a dev teamnot Firebase Realtime Database
  • Internal business apps with custom database logicnot Firebase Realtime Database
  • Marketplace and SaaS prototypesnot Firebase Realtime Database
  • Mobile app wrappers around a Bubble web appnot Firebase Realtime Database

Firebase Realtime Database

  • Syncing JSON application state between clients in real timenot Bubble
  • Backing mobile and web apps with offline capable data storagenot Bubble
  • Prototyping realtime features such as presence and chatnot Bubble

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Bubble

  • Apps are tied to Bubble's proprietary runtime, making migration to another stack difficult if the platform is later outgrown
  • Complex apps can hit performance limits compared to hand-coded applications as data and workflow complexity grows
  • The visual workflow editor has a steep learning curve for genuinely complex business logic
  • Free tier cannot host apps on a custom domain, limiting it to prototyping rather than production launches

Firebase Realtime Database

  • The no-cost Spark plan caps storage at 1 GB, downloads at 10 GB per month and simultaneous connections at 100
  • The Spark plan does not support multiple databases in a project
  • Even on the paid Blaze plan simultaneous connections are capped at 200,000 per database
  • Billing is by data transferred out at $1 per GB plus $5 per GB stored, so chatty clients cost more than the data volume suggests

Pricing, plan by plan

Bubble

Free

No published plan breakdown. See the Bubble review.

Firebase Realtime Database

Free
  • SparkFree
    • 1 GB data storage included
    • 10 GB per month data downloads included
    • No charges for usage within limits
  • Blaze$5
    • Maintains Spark free allowances
    • Pay-as-you-go for usage exceeding limits
    • Billing applies to data stored and outbound network traffic

Which should you pick?

Choose Bubble if

  • You need visual app editor.
  • You want to start without paying.
  • You work on Web, iOS, Android.
  • You also want built-in database.
Bubble review

Choose Firebase Realtime Database if

  • You need real-time sync.
  • You want to start without paying.
  • You work on Web, iOS, Android.
  • You also want offline support.
Firebase Realtime Database review

Questions people ask

Is Bubble or Firebase Realtime Database better?
Neither clearly leads. Bubble starts at Free and Firebase Realtime Database at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Bubble or Firebase Realtime Database?
Bubble starts at Free and Firebase Realtime Database at Free.
Does Bubble or Firebase Realtime Database run on more platforms?
Both run on Web, iOS, Android, so platform support will not decide this one for you.
Can I use Bubble for free?
Both have a free tier, so you can try either at no cost before committing.
What is Bubble best used for?
Bubble is most often used for building mvps and startup web apps without a dev team, internal business apps with custom database logic, marketplace and saas prototypes, mobile app wrappers around a bubble web app. Of those, building mvps and startup web apps without a dev team and internal business apps with custom database logic are not what Firebase Realtime Database is typically brought in for.
What can Bubble do that Firebase Realtime Database cannot?
Bubble covers Visual app editor, Built-in database, Visual workflow logic, Plugin marketplace. Firebase Realtime Database covers Real-time Sync, Offline Support, JSON Storage, Security Rules.

Answered from the vendors’ own pages

Bubble: Does Bubble publish pricing information on their main website?

Bubble's pricing details are not available on the main homepage. Detailed pricing information would need to be found on their dedicated pricing page or terms of service.

Source
Firebase Realtime Database: How much does Firebase Realtime Database cost?

Firebase Realtime Database offers a free Spark plan (1 GB storage, 10 GB/month downloads) and a pay-as-you-go Blaze plan. On Blaze, storage costs $5 per GB per month, evaluated daily, with no monthly minimum charges.

Source
Firebase Realtime Database: What is included in Firebase Realtime Database free tier?

The Spark plan includes 1 GB of data storage and 10 GB per month of data downloads at no cost. Usage within these limits incurs no charges, making it suitable for small projects and testing.

Source
Firebase Realtime Database: Does Firebase Realtime Database charge for denied or rejected operations?

Yes. Firebase charges for all traffic to and from the database on the Blaze plan, including operations denied by security rules, outbound network traffic at the session layer, and connection and encryption overhead from all operations.

Source
Firebase Realtime Database: Can I set a spending limit on Firebase Realtime Database?

Firebase offers budget alerts but does not cap spending automatically. Users must monitor their usage dashboard in the Firebase console to track connections, storage, downloads, and load metrics; a calculator is available for cost estimation.

Source
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