Firebase Pricing 2026: Spark Free vs Blaze Pay as You Go
A November 2026 guide to Firebase pricing: the free Spark plan, the Blaze pay-as-you-go plan, free quotas and overage rates for Firestore, Cloud Functions, Storage, Hosting, Authentication and SQL Connect, which services are always free, and how to avoid surprise bills.
Published <time datetime="2026-11-10">November 10, 2026</time> · Last updated <time datetime="2026-11-10">November 10, 2026</time>
Firebase Pricing: The Short Answer
Firebase has two plans. Spark is free, needs no payment method and has fixed usage limits. Blaze is pay as you go: it includes the same no-cost usage as Spark, unlocks more services such as Cloud Functions, and bills you only for usage above the free quotas. Eligible new accounts get $300 of free credit on Blaze. Many Firebase products, including Analytics, Crashlytics for mobile and Cloud Messaging, are free on both plans.
Quick answer: How much does Firebase cost? $0 on Spark. On Blaze there is no monthly fee; you pay for usage past the free quotas, for example $0.40 per million Cloud Functions invocations after 2 million a month. Prices are from Firebase's pricing page, checked November 10, 2026.
Services That Are Free on Both Plans
A/B Testing, Analytics, App Distribution, Cloud Messaging (FCM), In-App Messaging, Performance Monitoring and Crashlytics for mobile apps are listed as no-cost.
Firebase Free Quotas and Blaze Rates
| Service | Free quota (Spark and Blaze) | Blaze rate above quota |
|---|---|---|
| Firestore stored data | 1 GiB | Google Cloud pricing |
| Firestore reads | 50,000 a day | Google Cloud pricing |
| Firestore writes | 20,000 a day | Google Cloud pricing |
| Cloud Functions invocations | 2M a month (Blaze only) | $0.40 per million |
| Cloud Functions outbound data | 5 GB a month (Blaze only) | $0.12 per GB |
| Authentication | 50,000 monthly active users | Google Cloud pricing; phone auth billed per SMS |
| Hosting storage | 10 GB | $0.026 per GB |
| Hosting data transfer | 360 MB a day | $0.15 per GB |
| Cloud Storage (legacy appspot bucket) | 5 GB stored, 1 GB a day downloaded | $0.026 per GB stored, $0.12 per GB downloaded |
| App Hosting bandwidth | n/a on Spark | 10 GiB a month free, then $0.20 per GiB uncached |
Spark does not include Cloud Functions or App Hosting at all. Phone authentication is billed per SMS on Blaze.
SQL Connect and Cloud SQL
Firebase SQL Connect gives a 3-month no-cost trial of a Cloud SQL for PostgreSQL instance. After the trial, Firebase says instances start as low as $9.37 a month, depending on region and configuration. On Spark, an instance not upgraded to Blaze by the end of the trial is archived, then deleted 90 days later.
How to Avoid a Surprise Firebase Bill
- Set a budget alert in Google Cloud for your Blaze project.
- Watch Firestore reads: a screen that re-reads a large collection on every load is the usual cause of high bills.
- Cache images and static files so Hosting and Storage downloads stay inside the free quota.
- Use the Google Cloud pricing calculator for apps at scale, as Firebase recommends.
Is Firebase Worth It?
For a new mobile app, Spark covers development and a small launch for free, and Blaze stays cheap while you are inside the daily quotas. Costs become harder to predict at scale because they track usage closely. Teams that prefer a fixed base fee often compare it with Supabase.
Firebase Alternatives
| Backend | Free tier | Paid starting point |
|---|---|---|
| Firebase | Spark | Blaze, usage only |
| Supabase | 2 projects, 500 MB database | $25 a month (Pro) |
| Vercel (hosting) | Hobby | $20 a month (Pro) |
See our Supabase pricing and Vercel pricing guides. FlutterFlow and many other builders connect to Firebase. As a disclosure, Superapp is our product, so weigh this accordingly. Superapp turns a plain-English description into a native Swift app for iPhone, iPad, Apple Watch or Mac, or a web app with a cloud backend, and prepares the App Store submission, so you do not configure Firebase yourself. It does not build Android apps.
Frequently Asked Questions
Is Firebase free? Yes. The Spark plan is free with no payment method, and many products such as Analytics, Crashlytics for mobile and Cloud Messaging are free on every plan.
What is the Firebase Blaze plan? Blaze is pay as you go. It includes Spark's free usage, unlocks more services such as Cloud Functions, and bills only for usage above the free quotas.
Does Blaze have a monthly fee? No. You pay only for usage above the free quotas.
Do I get free credit on Firebase? Firebase says eligible accounts get $300 of free credit on Blaze.
How much do Cloud Functions cost? 2 million invocations a month are free on Blaze, then $0.40 per million, plus compute and networking charges.
How much does Firestore cost? Up to 1 GiB stored, 50,000 reads and 20,000 writes a day are free, then Google Cloud pricing applies on Blaze.
Is Firebase Authentication free? Up to 50,000 monthly active users at no cost. Phone authentication is billed per SMS on Blaze.
Is Firebase cheaper than Supabase? For small apps inside the free quotas, Firebase can cost nothing. Supabase Pro has a $25 base fee with larger included quotas.