Can I open-source Firebase Blaze?
YES · mature open-source replacementYes. Supabase (108k stars), PocketBase (59k stars), Appwrite (57k stars) are mature open-source replacements for Firebase Blaze — self-host with real ops work and stop paying.
People still pay for Firebase Blaze because hosting products sell an operations team and failure-domain diversity, not merely a deploy button. The recurring cost buys patching, certificates, isolation, secrets, builds, deploys, logs, metrics, backups, capacity, incidents, and security response, not just the visible interface.
xglobal database, auth, push, analytics, serverless, mobile SDKs, and operations
xglobal edge network
xmanaged databases
xautoscaling
xDDoS protection, support, and compliance
These projects already replace it, free.
SSupabaseA local, self-hosted backend with emulators-by-Docker: database, auth, storage, realtime, functions, and APIs.open source↗PPocketBaseFor one modest app, a single local binary covers data, auth, files, realtime, and an admin UI; functions are the missing piece.open source↗AAppwriteAuth, database, storage, realtime, and functions behind one polished console; the Compose file is doing a lot.open source↗What each one is, in full: Supabase · PocketBase · Appwrite
all 8 open-source alternatives to Firebase Blaze →· no votes, no pay-to-list · just what's real
Firebase Blaze pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| spark | $0/workspace | $0/workspace | Auth 50,000 MAU; Firestore 1 GiB, 50,000 reads/day, 20,000 writes/day and 20,000 deletes/day; Hosting 10 GB storage and 10 GB transfer/month; Realtime Database 1 GB, 100 concurrent connections and 10 GB download/month. |
| blaze | $0/workspace | — | No base fee; retains no-cost quotas and adds Functions 2M invocations/month, 400,000 GB-seconds, 200,000 CPU-seconds and 5 GB egress; then pay as you go. |
free tierSpark: Auth 50,000 MAU; Firestore 1 GiB plus 50,000 reads/day and 20,000 writes/day; Hosting 10 GB storage plus 10 GB transfer/month; Realtime Database 1 GB and 100 concurrent connections
billingSpark is free with hard caps; Blaze has $0 base and monthly pay-as-you-go billing; no annual plan
hidden costsBlaze bills every Firebase/Google Cloud product independently after free quotas. Budget alerts do not stop spend, Storage pricing follows Google Cloud by region, and enabling Blaze can make previously hard-stopped usage billable.
verified 2026-08-14 · source ↗
Can I open-source Firebase Blaze?
Yes. Supabase replaces Firebase Blaze today — self-host it on your own server or machine with no subscription. The full list of open-source alternatives is on this page.
How much does Firebase Blaze cost?
Firebase Blaze's pricing is usage-based or varies by plan · Blaze is pay as you go; canonical monthly amount is null..
What do I lose by replacing Firebase Blaze?
Honestly: global database, auth, push, analytics, serverless, mobile SDKs, and operations; global edge network; managed databases; autoscaling; DDoS protection, support, and compliance. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Firebase Blaze?
Yes: Supabase (A local, self-hosted backend with emulators-by-Docker: database, auth, storage, realtime, functions, and APIs.) PocketBase (For one modest app, a single local binary covers data, auth, files, realtime, and an admin UI; functions are the missing piece.) Appwrite (Auth, database, storage, realtime, and functions behind one polished console; the Compose file is doing a lot.) All 8 curated open-source alternatives are at caniopensourceit.online/firebase-blaze/alternatives.