Firebase vs Fly.io
Firebase vs Fly.io compared for European indie developers and small startups. Pricing, EU jurisdiction, GDPR posture — and why Runsite (an EU-registered PaaS in Frankfurt) is worth a look.
// firebase problems → runsite solutions
Sound Familiar?
Every Firebase frustration, solved.
Firebase problem
"Firebase locks me into Google"
Firestore, Cloud Functions, Firebase Auth — proprietary services that don't work outside Google Cloud.
Runsite solution
Open standards everywhere
PostgreSQL, Docker, S3. Standard tools that work on any platform.
Firebase problem
"GDPR compliance is complicated"
Firebase requires a Google Cloud DPA, data residency configuration, and careful SDK setup for EU compliance.
Runsite solution
GDPR by default
EU entity. EU servers. No configuration needed. Compliant from day one.
Firebase problem
"Costs spike with traffic"
Firebase charges per document read/write. A viral moment can mean a massive surprise bill.
Runsite solution
Fixed pricing + spending caps
Predictable monthly bills with hard limits. Traffic spikes don't break the bank.
// comparison
Runsite vs Firebase
Side-by-side. No marketing fluff — just facts.
| Feature | Runsite | Firebase |
|---|---|---|
| Vendor Lock-in | ✓ Open standards, Docker | ✗ Proprietary SDKs |
| EU Data Centers | ✓ Frankfurt (eu-central) | ✓ europe-west regions |
| GDPR Compliance | ✓ EU entity, full compliance | Complex DPA required |
| Backend Hosting | ✓ Full containers | Cloud Functions only |
| Database | ✓ Standard PostgreSQL | Firestore (proprietary) |
| Pricing Transparency | ✓ Fixed plans | Pay-per-read/write |
// the other side
What about Fly.io?
Fly.io is powerful but complex. Runsite gives you the same edge — EU data centers, Docker support — with zero DevOps.
// fly.io problems → runsite solutions
Sound Familiar?
Every Fly.io frustration, solved.
Fly.io problem
"Fly.io has a steep learning curve"
Machines API, fly.toml, volumes, regions — Fly.io is powerful but requires significant DevOps knowledge.
Runsite solution
Git push and done
Connect your GitHub repo, pick a region, deploy. No config files, no CLI learning curve.
Fly.io problem
"Fly.io is a US company"
Even with EU regions, Fly.io is subject to US jurisdiction and the CLOUD Act.
Runsite solution
EU-registered entity
Runsite is an EU company. Your data is governed by European law, period.
Fly.io problem
"Usage-based billing is unpredictable"
Per-second VM billing and bandwidth charges make it hard to predict monthly costs.
Runsite solution
Fixed plans + hard caps
Know exactly what you'll pay. Set a spending limit that can't be exceeded.
// comparison
Runsite vs Fly.io
Side-by-side. No marketing fluff — just facts.
| Feature | Runsite | Fly.io |
|---|---|---|
| Setup Complexity | ✓ Git push deploy | flyctl CLI + TOML config |
| EU Data Centers | ✓ Frankfurt (eu-central) | ✓ Multiple EU regions |
| GDPR Compliance | ✓ EU entity, full compliance | ✗ US company |
| Free Tier | ✓ Permanent | ✓ $5/mo free allowance |
| Managed PostgreSQL | ✓ From €5/mo | ✓ Fly Postgres |
| Docker Support | ✓ Any Dockerfile | ✓ Firecracker VMs |
| Spending Limits | ✓ Hard cap + alerts | ✗ Usage-based only |
| Learning Curve | ✓ Minimal — connect GitHub, deploy | Steep — Machines API, volumes, TOML |
// why consider runsite
Beyond Firebase and Fly.io
EU PaaS for indie developers and small European startups. One region: Frankfurt.
EU-First Infrastructure
While Firebase and Fly.io default to US markets, Runsite is built exclusively for European developers. Frankfurt (eu-central) region, EU entity, EU jurisdiction — no transatlantic transfers.
Real GDPR Compliance
EU-registered entity. Your data is governed by European law. No US jurisdiction, no CLOUD Act.
Predictable Pricing
No per-invocation charges, no surprise bills. Fixed plans with hard spending caps and Telegram alerts.
Common Questions
FAQ
Which is better for EU hosting, Firebase or Fly.io?
Neither Firebase nor Fly.io is EU-native. Both are US-headquartered and route the majority of traffic through US data centers. For genuine EU data residency, an EU-registered platform like Runsite is the safer choice — a Frankfurt (eu-central) region under EU jurisdiction, no transatlantic transfers, no CLOUD Act exposure.
Which has the better free tier, Firebase or Fly.io?
Free tiers on both Firebase and Fly.io change frequently and often include compute or bandwidth caps that expire after a trial period. If a permanent free tier matters, evaluate the current terms on each provider before committing.
Is Firebase or Fly.io GDPR-compliant?
Both can be configured to support GDPR-compliant workloads via Data Processing Agreements (DPAs), but as US entities they remain subject to the CLOUD Act. For workloads where US jurisdiction is a hard blocker, an EU-headquartered provider is required.
What is the cheapest way to deploy a side project — Firebase or Fly.io?
Pricing on both Firebase and Fly.io can scale unpredictably with traffic or build minutes. Hard spending caps are not available on either platform. Predictable monthly pricing with usage caps is a differentiator to look for elsewhere.
// explore alternatives
Try the European Alternative
Skip the Firebase vs Fly.io debate. Deploy on Runsite.
Start Free on Runsite →