Is Adjust or Firebase better?

Neither clearly leads. Adjust starts at On request and Firebase at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Adjust or Firebase?

Firebase has a free tier; the other does not. Paid plans start at On request for Adjust and Free for Firebase.

Does Adjust or Firebase run on more platforms?

Adjust runs on iOS, Android, Web. Firebase runs on iOS, Android, Web, Flutter, C++, Unity.

Can I use Firebase for free?

Yes. Firebase has a free tier, so you can try it without paying. Adjust starts at On request.

What is Adjust best used for?

Adjust is most often used for an advertiser wanting fraud rejection applied before invoices are approved rather than clawed back afterwards, european organisations that need attribution data held in the european union, mid sized user acquisition teams that found the largest measurement partner's commitment level unaffordable, games publishers running spend across many networks who need one reconciled performance view. Of those, an advertiser wanting fraud rejection applied before invoices are approved rather than clawed back afterwards and european organisations that need attribution data held in the european union are not what Firebase is typically brought in for.

What can Adjust do that Firebase cannot?

Adjust covers Install and event attribution, Fraud prevention, Audience builder, Automate. Firebase covers Real-time Database, REST API, Authentication, Google Cloud.

Mobile Development · head to head

Adjust vs Firebase

Adjust

Mobile Development

Mobile measurement and fraud prevention, owned by the ad network AppLovin since 2021

From: On request
Rated: -

Full review Website

Firebase

Mobile Development

Google's platform for building web and mobile applications with cloud backend

From: Free
Rated: -

Full review Website

The short version

Only Firebase has a free tier, so it costs nothing to try first.
Each has a real cost: Adjust the vendor is owned by AppLovin, an advertising network and game publisher, so the party measuring campaign performance has a corporate interest in some of the inventory being measured.; Firebase spark plan limited to 1 GiB storage, 50,000 daily reads, 20,000 daily writes
They diverge on capability: Adjust covers Install and event attribution, Firebase covers Real-time Database.
Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Adjust and Firebase actually diverge.

Attributes where Adjust and Firebase differ
Attribute	Adjust	Firebase
Starting price	On request	Free
Pricing model	Per attributed install	freemium
Free tier	No	Yes
Platforms	iOS, Android, Web	iOS, Android, Web, Flutter, C++, Unity
Founded	Unknown	1998

Identical on both: user rating (Not yet rated), category (Mobile Development).

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 Adjust

Install and event attribution
Fraud prevention
Audience builder
Automate
Datascape reporting
Data residency options

Only in Firebase

Real-time Database
REST API
Authentication
Google Cloud
Cloud functions
Cloud Storage
Web support
Mobile support

What people use each for

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

Adjust

An advertiser wanting fraud rejection applied before invoices are approved rather than clawed back afterwardsnot Firebase
European organisations that need attribution data held in the European Unionnot Firebase
Mid sized user acquisition teams that found the largest measurement partner's commitment level unaffordablenot Firebase
Games publishers running spend across many networks who need one reconciled performance viewnot Firebase

Firebase

Mobile app backend developmentnot Adjust
Real-time data synchronisationnot Adjust
Web application backendnot Adjust
Cross-platform app developmentnot Adjust

Where each one falls short

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

Adjust

The vendor is owned by AppLovin, an advertising network and game publisher, so the party measuring campaign performance has a corporate interest in some of the inventory being measured.
Pricing is per attributed install on an annual commitment, meaning a successful campaign raises the measurement bill proportionally and overage above the commitment is charged at a worse rate.
App Tracking Transparency removed deterministic iOS attribution for users who decline tracking, so a significant portion of iOS reporting is modelled and the interface does not always separate modelled from observed.
Fraud prevention, audiences and the analytics layer are priced as separate modules, so a comparison against a competitor quote is only valid if module scope is matched line by line.
Attribution history stays with the vendor, so switching partners breaks year on year comparisons and the cost of leaving rises with every year of data accumulated.

Firebase

Spark plan limited to 1 GiB storage, 50,000 daily reads, 20,000 daily writes
Spark plan restricts to 100 concurrent database connections
Spark plan limits Firebase Studio to 3 workspaces maximum
Document size capped at 1 MiB per document
Transaction time limited to 270 seconds with 60-second idle expiration
Maximum 100 databases per project (increase requires support request)

Pricing, plan by plan

Adjust

On request

Adjust$undefined/year
- Annual commitment priced on attributed install volume, with fraud prevention and audiences as add on modules
- Terms are negotiated and not published; mid market discounting is generally more available than at the largest competitor

Firebase

Free

SparkFree
- No-cost usage with daily-refreshing quotas
- Cloud Firestore: up to 1 GB storage, 20K writes/day, 50K reads/day
- Cloud Functions: up to 2M invocations/month, 400K GB-seconds/month
Blaze$null/variable
- Pay-as-you-go usage beyond free tier
- Cloud Firestore: $5/GB after 1 GB, writes beyond 20K/day at overage rates
- Cloud Functions: $0.40 per million invocations beyond 2M/month, $0.12/GB for outbound networking beyond 5 GB/month

Which should you pick?

Choose Adjust if

You need install and event attribution.
You work on iOS, Android, Web.
You also want fraud prevention.

Adjust review

Choose Firebase if

You need real-time database.
You want to start without paying.
You work on iOS, Android, Web, Flutter, C++, Unity.
You also want rest api.

Firebase review

Questions people ask

Is Adjust or Firebase better?: Neither clearly leads. Adjust starts at On request and Firebase at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Adjust or Firebase?: Firebase has a free tier; the other does not. Paid plans start at On request for Adjust and Free for Firebase.
Does Adjust or Firebase run on more platforms?: Adjust runs on iOS, Android, Web. Firebase runs on iOS, Android, Web, Flutter, C++, Unity.
Can I use Firebase for free?: Yes. Firebase has a free tier, so you can try it without paying. Adjust starts at On request.
What is Adjust best used for?: Adjust is most often used for an advertiser wanting fraud rejection applied before invoices are approved rather than clawed back afterwards, european organisations that need attribution data held in the european union, mid sized user acquisition teams that found the largest measurement partner's commitment level unaffordable, games publishers running spend across many networks who need one reconciled performance view. Of those, an advertiser wanting fraud rejection applied before invoices are approved rather than clawed back afterwards and european organisations that need attribution data held in the european union are not what Firebase is typically brought in for.
What can Adjust do that Firebase cannot?: Adjust covers Install and event attribution, Fraud prevention, Audience builder, Automate. Firebase covers Real-time Database, REST API, Authentication, Google Cloud.

Answered from the vendors’ own pages

Adjust: Does AppLovin ownership compromise measurement?

There is no public evidence of manipulation, but the structural conflict exists. Some advertisers exclude Adjust for that reason alone and it is a legitimate position.

Firebase: What are Firebase's free tier limits?

Firebase Spark plan includes no-cost daily-refreshing quotas: Cloud Firestore up to 1 GB storage with 20K writes and 50K reads per day; Cloud Functions up to 2M invocations monthly; Cloud Storage 5 GB-months with 100 GB downloads monthly; Hosting 10 GB storage and 360 MB daily data transfer; Realtime Database up to 1 GB storage. No payment method required.

Source

Adjust: How does it compare with AppsFlyer on price?

Generally more flexible for mid sized advertisers. Compare module scope, not headline rates, because attribution alone is rarely what you need.

Firebase: How much does Firebase Blaze plan cost?

Firebase Blaze is pay-as-you-go beyond free tier limits. Pricing includes Cloud Firestore storage at $5/GB after 1 GB; Cloud Functions $0.40 per million invocations beyond 2M monthly; Cloud Storage $0.026/GB beyond 5 GB; Hosting $0.15/GB beyond 360 MB daily. New eligible customers receive $300 free credit.

Source

Adjust: Can data be kept in the EU?

Yes, European hosting is offered, which is a common reason for choosing it over United States based competitors.

Firebase: Which Firebase services are always free regardless of tier?

A/B Testing, Analytics, App Check, Cloud Messaging, and Crashlytics are offered at no cost on both Spark and Blaze plans, with no usage limits stated.

Source

Adjust vs Firebase

Adjust

Firebase

The short version

Where they differ

What each one covers

Only in Adjust

Only in Firebase

What people use each for

Adjust

Firebase

Where each one falls short

Adjust

Firebase

Pricing, plan by plan

Adjust

Firebase

Which should you pick?

Choose Adjust if

Choose Firebase if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Adjust

More on Firebase

Keep looking

Other head to heads