Firebase pricing: tiers, seat costs, and hidden fees

Short answer

Google-backed mobile/web BaaS. Generous Spark free tier but the Blaze pay-as-you-go plan inherits Google Cloud's metering complexity.

Last verified: 2026-05-17 Model: month Official pricing

Public pricing tiers

TierMonthlyAnnual monthly equivalentNotes

Spark (Free) $0 month $0 month 1GiB Firestore, 50K reads/day, 5GB Cloud Storage, 2M Cloud Functions calls.

Blaze (Pay-as-you-go) $25 estimated month $25 estimated month No fixed price; example real-world bill for a small app. $300 free credit if eligible.

Blaze (mid app) $200 estimated month $200 estimated month Common bill for app at ~1M Firestore reads/day with Cloud Functions and Storage.

Firebase cost calculator

For 10 seats on Blaze (Pay-as-you-go), current public pricing implies $25 per month when annual pricing is available, or $25 month-to-month.

Sample stack cost at named team sizes

Firebase monthly cost projection by team size, based on public per-seat pricing.
Tier	10 seats / month	25 seats / month	50 seats / month
Spark (Free)	$0	$0	$0
Blaze (Pay-as-you-go)	$25	$25	$25
Blaze (mid app)	$200	$200	$200

Math: per-seat tiers multiplied by seat count. Flat-fee tiers stay constant. Does not include add-ons, support tiers, implementation, or usage overages.

Hidden fees and quote risks

Cloud Functions at $0.40 per million invocations after 2M free.
Cloud Storage at $0.026/GB stored and $0.12/GB downloaded.
Realtime Database at $5/GB stored above 1GB.
Phone Auth billed per SMS separately from main quota.
Cloud Vision API hits $1.50 per 1K calls when using Firebase ML.

Enterprise notes

Multiple databases and buckets supported on Blaze; enterprise SLA needs separate Google Cloud Premium Support contract.

Closest alternatives

Other backend-as-a-service tools buyers shortlist when they compare Firebase.

Supabase Backend-as-a-service

AWS Amplify Frontend hosting

Appwrite Not yet covered

Sources

Official Firebase pricing page

Pricing changes frequently. Confirm directly with the vendor before purchase.

Frequently asked questions

How much does Firebase cost?

Firebase pricing depends on its Free tier + pay-as-you-go (Blaze). The page lists public tiers and flags custom or usage-based items that require vendor confirmation.

What is the main hidden fee risk for Firebase?

Cloud Functions at $0.40 per million invocations after 2M free.

Which Firebase alternatives should buyers compare?

Supabase, AWS Amplify, Appwrite are the closest alternatives most procurement teams compare against Firebase.