Coolify vs Fly.io
Coolify 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.
Coolify vs Fly.io: quick answer
Coolify and Fly.io both offer Git-push deploy workflows, but they differ where it counts. Coolify (self-hosted) and Fly.io (US-headquartered) sit on different sides of the data-residency question. For European teams that need GDPR-compliant hosting in Frankfurt with predictable EUR billing and a permanent free tier, Runsite is the EU-native alternative to both.
// coolify problems → runsite solutions
Common Coolify frustrations. Sound familiar?
Every Coolify frustration, solved.
Coolify problem
"I spend hours maintaining the server"
Coolify runs on your VPS. You're responsible for OS updates, security patches, backups, and uptime.
Runsite solution
Fully managed infrastructure
99.9% uptime SLA. Auto-updates. Automated backups. Focus on building, not maintaining.
Coolify problem
"Setup took an hour"
Provision a VPS, install Docker, install Coolify, configure DNS, set up SSL, before deploying anything.
Runsite solution
Deploy in 2 minutes
Connect GitHub. Pick a region. Deploy. SSL and DNS handled automatically.
Coolify problem
"My Coolify server went down at 3am"
Self-hosted means self-monitored. Server crashes, disk full, or OOM: it's your problem.
Runsite solution
24/7 monitoring + auto-recovery
We monitor, restart, and scale your apps. You sleep through the night.
// comparison
Runsite vs Coolify
Side-by-side. No marketing fluff, just facts.
| Feature | Runsite | Coolify |
|---|---|---|
| Server Management | ✓ Fully managed | ✗ Self-hosted, you manage |
| Setup Time | ✓ 2 minutes | 30-60 min (VPS + install) |
| Uptime & Maintenance | ✓ 99.9% SLA, auto-updates | You handle updates & backups |
| GDPR Compliance | ✓ EU entity | Depends on your VPS provider |
| Cost (small apps) | €5/mo | VPS $5-10/mo + time |
| Cost (large scale) | Usage-based pricing | ✓ Cheaper at scale |
| Open Source | Closed source | ✓ Fully open source |
// 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
Common Fly.io frustrations. 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 |
// in-depth comparison
How Coolify and Fly.io each compare to Runsite
Coolify vs Runsite
With Coolify, the software is rarely what wears you down. The 3am pager is. Self-hosting means you provision a VPS, install and update Coolify, manage disk space, handle SSL renewals when they fail, configure backups, and respond when the server goes down. GDPR compliance depends entirely on which VPS provider and region you choose.
None of that is a knock on the project. Coolify is one of the best open-source self-hosting platforms available: the web UI is polished, it supports Docker Compose and buildpacks, and it is actively maintained. For developers who want full control and enjoy the self-hosting philosophy, it delivers real value on a $5/month VPS.
Runsite runs the same workflow, connect a repo and deploy, but on managed multi-node infrastructure with a 99.9% uptime SLA, automated backups, and EU data residency guaranteed by an EU-registered entity. If you value the self-hosting ethos but have tired of the maintenance tax, the permanent free tier also removes the VPS cost floor entirely for side projects.
Fly.io vs Runsite
The thing that trips people up on Fly.io is the complexity, not the capability. The fly.toml configuration, Machines API, volume management, and region-aware routing all require significant learning before you ship. Per-second billing across multiple dimensions (CPU, RAM, bandwidth, IPs) makes cost prediction difficult, and because Fly.io is a US company, even its EU regions leave your account and metadata under US jurisdiction.
None of that is a knock on the engineering. Firecracker microVMs, global edge deployment, WireGuard-based private networking, and a powerful Machines API give you fine-grained control over where and how your containers run. For developers who want infrastructure-level flexibility with some PaaS convenience, Fly.io delivers.
Runsite makes the opposite trade, swapping low-level control for simplicity: connect GitHub, pick a region, deploy. Fixed monthly pricing with hard spending caps and full EU legal compliance. If you want Docker hosting in Europe without learning a new infrastructure API, and you value predictable costs over edge computing flexibility, Runsite removes the operational overhead that Fly.io requires.
// why consider runsite
Beyond Coolify and Fly.io
EU PaaS for indie developers and small European startups. One region: Frankfurt.
EU-First Infrastructure
While Coolify and Fly.io default to US markets, Runsite is built exclusively for European developers. Frankfurt (eu-central) region, EU entity, EU jurisdiction, with 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, Coolify or Fly.io?
Coolify (self-hosted) has the stronger EU-residency story here, while Fly.io is US-headquartered and stays subject to the US CLOUD Act even in its European regions. If jurisdiction is your deciding factor, that gap matters. Runsite is EU-native as well, running exclusively in Frankfurt (eu-central) under an EU entity, and adds fully managed deploys, predictable EUR billing, and a permanent free tier — so you get European residency without giving up developer experience.
Which has the better free tier, Coolify or Fly.io?
Free tiers on both Coolify and Fly.io change frequently and tend to share the same catch: compute that sleeps after inactivity, bandwidth or build-minute caps, or trial credits that expire after a fixed window. They are fine for quick experiments but rarely sustainable for an always-on hobby project. If a permanent free tier matters, read the current terms carefully. Limits are often buried in the pricing footnotes. Runsite takes the opposite approach: a free tier with no credit card and no expiry, designed to keep small projects online indefinitely rather than nudging you onto a paid plan.
Is Coolify or Fly.io GDPR-compliant?
Coolify (self-hosted) can keep data under European jurisdiction, whereas Fly.io, as a US-incorporated provider, remains subject to the US CLOUD Act regardless of the region you pick — a common sticking point in DPO review. For workloads where EU jurisdiction is a hard requirement, an EU-registered provider removes the ambiguity. Runsite keeps data in Frankfurt under an EU entity, so GDPR posture is the default rather than a per-region configuration exercise.
What is the cheapest way to deploy a side project, Coolify or Fly.io?
For a single small service, both Coolify and Fly.io can look inexpensive on paper. The headline price rarely matches the real bill. Per-service billing, metered bandwidth, build minutes, and add-ons for databases or key-value stores stack up quickly, and neither platform offers a hard spending cap to stop a surprise invoice. The cheapest predictable option is one with fixed monthly pricing and an enforced ceiling. Runsite bills in EUR from €5/month with hard spending caps and Telegram alerts, plus a permanent free tier, so a side project stays cheap by design, not by careful monitoring.
// explore alternatives
Try the European Alternative
Skip the Coolify vs Fly.io debate. Deploy on Runsite.
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