Fly.io vs Koyeb
Fly.io vs Koyeb 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.
Fly.io vs Koyeb: quick answer
Fly.io and Koyeb both offer Git-push deploy workflows, but they differ where it counts. Koyeb (a French (EU) company) 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.
// 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 |
// the other side
What about Koyeb?
Koyeb was a great indie PaaS: until Mistral AI acquired it. Runsite is an independent EU PaaS focused on developers, not AI infrastructure.
// koyeb problems → runsite solutions
Common Koyeb frustrations. Sound familiar?
Every Koyeb frustration, solved.
Koyeb problem
"Koyeb got acquired. What happens now?"
Mistral AI bought Koyeb in February 2026 to build AI infrastructure. The general-purpose PaaS roadmap is uncertain.
Runsite solution
Independent, developer-focused PaaS
Runsite is an independent EU company. Our roadmap serves web developers, not AI training pipelines.
Koyeb problem
"New signups need Pro at $29/mo"
Koyeb's free Starter tier is being restricted. New users must subscribe to Pro ($29/mo) to get started.
Runsite solution
Free tier for everyone
Sign up, deploy, no credit card. Runsite's free tier is and will remain open to all developers.
Koyeb problem
"Free PostgreSQL is only 5 hours/month"
Koyeb's free Postgres allocation runs out fast. It's not usable for any persistent application.
Runsite solution
Always-on managed PostgreSQL
Runsite's free tier includes always-on services. Paid PostgreSQL from €5/mo with auto-backups.
// comparison
Runsite vs Koyeb
Side-by-side. No marketing fluff, just facts.
| Feature | Runsite | Koyeb |
|---|---|---|
| Platform Independence | ✓ Independent company | ✗ Acquired by Mistral AI (Feb 2026) |
| Free Tier Access | ✓ Open to all, no credit card | ✗ New signups require Pro ($29/mo) |
| Free PostgreSQL | ✓ Always available | ✗ 5 hours/month only |
| EU Region | ✓ Frankfurt (EU entity) | Frankfurt (US-incorporated parent) |
| Spending Limits | ✓ Hard cap + Telegram alerts | ✗ Usage-based billing |
| Paid Entry Price | €5/mo | $29/mo (Pro) |
| Scale to Zero | Coming soon | ✓ Built-in autoscaling |
| GPU Instances | Not available | ✓ Via Mistral infrastructure |
// in-depth comparison
How Fly.io and Koyeb each compare to Runsite
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.
Koyeb vs Runsite
In February 2026, Mistral AI acquired Koyeb to build AI infrastructure. That single move changed what the platform is for.
Koyeb had been a promising serverless PaaS with a developer-friendly approach to global deployment. Autoscaling, scale-to-zero, and Docker-based deployments gave you serverless convenience without the cold-start penalties of pure function platforms, and the accessible free tier plus a Frankfurt region served EU users well. The trouble is the new owner's priorities. The roadmap now answers to AI training and inference needs, the free tier is being restricted so new signups require Pro at $29/mo, and Koyeb's independence as a developer-first PaaS is gone.
Runsite is an independent EU company focused exclusively on web developers, with a permanent free tier open to everyone, hard spending limits, and a roadmap driven by indie-dev needs rather than AI-infrastructure pivots. If you chose Koyeb for its indie PaaS character and worry about the post-acquisition direction, that uncertainty is exactly what Runsite is built to remove.
// why consider runsite
Beyond Fly.io and Koyeb
EU PaaS for indie developers and small European startups. One region: Frankfurt.
EU-First Infrastructure
While Fly.io and Koyeb 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, Fly.io or Koyeb?
Koyeb (a French (EU) company) 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, Fly.io or Koyeb?
Free tiers on both Fly.io and Koyeb 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 Fly.io or Koyeb GDPR-compliant?
Koyeb (a French (EU) company) 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, Fly.io or Koyeb?
For a single small service, both Fly.io and Koyeb 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 Fly.io vs Koyeb debate. Deploy on Runsite.
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