Hetzner vs Fly.io
Detailed comparison of Hetzner and Fly.io to help you choose the right cloud tool in 2026.
Reviewed by the AI Tools Hub editorial team · Last updated February 2026
Hetzner
European cloud hosting provider
The best price-to-performance ratio in cloud hosting, with 20TB included traffic, European data centers, and dedicated server auctions — delivering hyperscale reliability at a fraction of the cost for teams comfortable managing their own infrastructure.
Fly.io
Deploy app servers close to users
The only platform that makes multi-region application deployment trivially easy — run full application servers (not just edge functions) close to users in 35+ cities worldwide using Firecracker micro-VMs with Anycast routing.
Overview
Hetzner
Hetzner is a German hosting company founded in 1997 that has earned a devoted following among developers and businesses seeking exceptional price-to-performance ratios for cloud infrastructure. While American cloud providers dominate the global market, Hetzner has quietly built one of Europe's most reliable hosting platforms from its own data centers in Falkenstein, Nuremberg, and Helsinki (Finland), with newer cloud regions in Ashburn (USA) and Singapore. The company owns and operates its physical infrastructure — from the buildings to the network equipment — which allows it to offer prices that consistently undercut AWS, GCP, and Azure by 50-80% for equivalent compute resources. Hetzner serves over 500,000 customers and manages hundreds of thousands of servers, making it one of the largest hosting providers in Europe.
Cloud Servers (CX and CPX Lines)
Hetzner Cloud servers start at just EUR 3.79/month for a shared vCPU with 2GB RAM, 20GB SSD, and 20TB of included traffic. The CPX line offers AMD EPYC processors with dedicated vCPU cores for compute-intensive workloads. ARM64 servers (CAX line) based on Ampere Altra processors offer even better value for compatible workloads. All cloud servers deploy in seconds, include IPv4 and IPv6 addresses, and come with 20TB of outbound traffic per month — a stark contrast to AWS and GCP where data transfer quickly becomes the largest line item on your bill. The generous traffic inclusion alone makes Hetzner compelling for bandwidth-heavy applications like media streaming, CDNs, and file hosting.
Dedicated Servers: Unmatched Value
Hetzner's dedicated server marketplace is legendary among budget-conscious operators. The Server Auction offers pre-configured physical servers (often with 64GB+ RAM, enterprise SSDs, and powerful CPUs) at prices starting around EUR 30-40/month — hardware that would cost $200-400/month from comparable providers. These are real dedicated machines, not VPS slices, providing full hardware access, no noisy neighbor issues, and the ability to run custom kernels or hypervisors. The auction constantly rotates inventory as Hetzner refreshes its fleet, creating opportunities for high-spec hardware at remarkable prices.
Networking and Load Balancers
Hetzner provides private networking (vSwitch), floating IPs, and load balancers at competitive prices. Load balancers start at EUR 5.49/month with included traffic. Firewalls are free and configurable via API or console. The network quality is excellent within Europe, with low latency to major European internet exchanges. However, latency to users in Asia, South America, or Oceania is naturally higher due to limited geographic presence — the Singapore region helps for Asia-Pacific, and the Ashburn region serves North America, but Hetzner cannot match the global reach of hyperscale providers.
Storage Solutions
Hetzner offers block storage volumes starting at EUR 0.044/GB/month (attached to cloud servers), Storage Boxes for FTP/SMB/SSH-accessible file storage starting at 1TB for EUR 3.81/month, and S3-compatible Object Storage. Storage Boxes are particularly popular for backups and file archival — a 10TB Storage Box costs around EUR 17/month, far cheaper than equivalent S3 or GCS storage. Object Storage, launched more recently, provides an S3-compatible API for application integration at competitive per-GB pricing.
Limitations and Trade-offs
Hetzner's value proposition comes with trade-offs. The managed service ecosystem is minimal — no managed databases, no serverless functions, no container registry, no managed Kubernetes control plane (though you can install k3s or use community tools like hetzner-k3s). Support is functional but basic compared to cloud providers offering premium support tiers with dedicated account managers. The web console and API are utilitarian rather than polished. Documentation is adequate but lacks the depth of AWS or DigitalOcean's tutorial ecosystem. For teams comfortable managing their own infrastructure, these trade-offs are easily worth the dramatic cost savings. For teams needing hand-holding or managed services, other providers may be more appropriate.
Fly.io
Fly.io is a platform founded in 2017 that transforms Docker containers into micro-VMs running on bare-metal servers in 35+ regions worldwide. While most hosting platforms deploy your application to a single data center (or at best, two), Fly.io's core promise is multi-region deployment by default — your application runs close to your users in cities like Amsterdam, Tokyo, Sao Paulo, Johannesburg, Sydney, and Chicago, with requests automatically routed to the nearest healthy instance. The platform was built by a team of infrastructure veterans who believed that edge computing should not require the complexity of Kubernetes or the limitations of serverless functions. Fly.io uses Firecracker (the same micro-VM technology created by AWS for Lambda and Fargate) to provide lightweight, secure isolation with near-instant startup times.
Firecracker Micro-VMs
Unlike platforms that use containers (shared kernel) or traditional VMs (heavy overhead), Fly.io runs applications in Firecracker micro-VMs that combine the security isolation of VMs with the speed and efficiency of containers. Each micro-VM boots in milliseconds, uses minimal memory overhead, and provides hardware-level isolation between tenants. This architecture means your application gets a dedicated kernel, filesystem, and network stack — stronger isolation than Docker containers — while still being lightweight enough to run in dozens of regions simultaneously.
Multi-Region by Default
Deploying to multiple regions on Fly.io is a single command: fly scale count 3 --region ams,nrt,iad places instances in Amsterdam, Tokyo, and Washington DC. Fly.io's Anycast network automatically routes each user's request to the nearest healthy instance. For applications with a primary database, Fly.io provides read replicas and request routing that sends writes to the primary region while serving reads locally. This architecture achieves the latency benefits of a global CDN while running full application servers — not just cached static content — close to users.
Fly Machines and GPUs
Fly Machines is the low-level API that gives you direct control over micro-VMs: start, stop, suspend, and resume machines programmatically with sub-second response times. This enables architectures where machines spin up on demand for each user session, function invocation, or build job, and stop when idle — paying only for active time. Fly.io also offers GPU machines for AI/ML workloads, providing access to NVIDIA A100 and L40S GPUs in select regions, enabling model inference close to users rather than in a centralized data center.
Built-in Postgres and Storage
Fly.io offers Fly Postgres — a managed PostgreSQL deployment that runs as Fly apps on your account. Unlike fully managed databases from AWS or Render, Fly Postgres gives you direct access to the underlying VM, allowing custom PostgreSQL configuration while automating replication and failover. LiteFS enables distributed SQLite with automatic replication across regions — ideal for read-heavy applications that benefit from local reads. Tigris (S3-compatible object storage) is integrated for file storage needs. Volume storage provides persistent NVMe-backed disks attached to individual machines.
Pricing and Considerations
Fly.io offers a free tier with up to 3 shared-CPU machines, 256MB RAM each, and 3GB persistent volume storage. Paid usage is billed per second: shared-CPU VMs start at approximately $1.94/month, and dedicated-CPU VMs from $29/month. The usage-based model is cost-effective for applications with variable traffic, as stopped machines incur no compute charges. However, multi-region deployments multiply costs linearly — running 3 instances across 3 regions means 9 machines. The platform's CLI-centric workflow, while powerful, has a steeper learning curve than GUI-first platforms like Render or Railway, and the documentation, while improving, can be inconsistent for some advanced scenarios.
Pros & Cons
Hetzner
Pros
- ✓ Exceptional price-to-performance ratio — 50-80% cheaper than AWS, GCP, or Azure for equivalent compute resources
- ✓ 20TB of outbound traffic included per month on every cloud server, eliminating the data transfer costs that dominate bills on hyperscale clouds
- ✓ Dedicated server auction offers real physical servers with enterprise hardware at remarkably low monthly prices
- ✓ European data centers with strong GDPR compliance — ideal for EU-based businesses with data residency requirements
- ✓ ARM64 (CAX) servers provide outstanding value for compatible workloads at even lower prices than x86 options
- ✓ Straightforward pricing with no hidden charges — what you see on the pricing page is what you pay
Cons
- ✗ Minimal managed services — no managed databases, no serverless, no container registry, requiring more self-management
- ✗ Limited global presence with data centers only in Germany, Finland, USA (Ashburn), and Singapore — not suitable for global low-latency requirements
- ✗ Basic support without premium tiers — response times can be slow for non-critical issues, and phone support is limited
- ✗ Sparse documentation and no community tutorial ecosystem comparable to DigitalOcean or AWS
- ✗ Web console and API are functional but lack the polish and feature depth of competing cloud platforms
Fly.io
Pros
- ✓ True multi-region deployment with a single command — applications run close to users in 35+ cities worldwide with Anycast routing
- ✓ Firecracker micro-VMs provide stronger security isolation than containers with near-instant boot times and minimal overhead
- ✓ Fly Machines API enables on-demand compute that starts and stops in milliseconds, allowing pay-per-use architectures
- ✓ Built-in Anycast networking automatically routes users to the nearest healthy instance without complex load balancer configuration
- ✓ LiteFS enables distributed SQLite with automatic replication, offering a unique approach to low-latency read-heavy workloads
- ✓ GPU support in edge regions enables AI model inference close to users rather than centralized in a single data center
Cons
- ✗ CLI-centric workflow has a steeper learning curve than GUI-first platforms — the web dashboard is secondary to the flyctl command line
- ✗ Multi-region costs add up quickly: running in N regions multiplies your compute bill by N, which can surprise teams scaling globally
- ✗ Fly Postgres is not fully managed — you get VMs running PostgreSQL and handle some operational tasks that RDS or Cloud SQL automate
- ✗ Documentation quality is inconsistent, with some advanced topics lacking clear guides and relying on community forum answers
- ✗ Smaller company with less operational track record than established providers — occasional platform-wide incidents have affected reliability perception
Feature Comparison
| Feature | Hetzner | Fly.io |
|---|---|---|
| Cloud Servers | ✓ | — |
| Dedicated Servers | ✓ | — |
| Load Balancers | ✓ | — |
| Volumes | ✓ | ✓ |
| Firewalls | ✓ | — |
| Edge Deployment | — | ✓ |
| Docker Apps | — | ✓ |
| PostgreSQL | — | ✓ |
| Private Networks | — | ✓ |
Integration Comparison
Hetzner Integrations
Fly.io Integrations
Pricing Comparison
Hetzner
€3.79/mo VPS
Fly.io
Free tier / Usage-based
Use Case Recommendations
Best uses for Hetzner
Cost-Optimized European Hosting
European startups and businesses use Hetzner to host applications, databases, and services at a fraction of the cost of hyperscale clouds. A production stack with multiple servers, load balancer, and block storage often costs under EUR 50/month — what would run EUR 200-400 on AWS or GCP.
Self-Managed Kubernetes Clusters
DevOps teams deploy lightweight Kubernetes distributions (k3s, k0s) on Hetzner Cloud servers using community tools like hetzner-k3s or Terraform modules. A production-ready 3-node cluster with load balancer costs around EUR 30/month, making Kubernetes accessible without the managed service premium.
High-Bandwidth Applications
Media streaming, CDN origin servers, game servers, and large file hosting services leverage Hetzner's 20TB included traffic to avoid the bandwidth costs that would make such applications prohibitively expensive on AWS or GCP. A dedicated server with 1Gbps connectivity and 20TB+ traffic costs under EUR 50/month.
Backup and Archival Storage
Organizations use Hetzner Storage Boxes for affordable, reliable backup storage. A 10TB Storage Box at around EUR 17/month serves as a target for automated backups from production servers on any cloud provider, accessible via FTP, SFTP, SMB, or rsync.
Best uses for Fly.io
Globally Distributed Web Applications
Applications serving users worldwide deploy to Fly.io's 35+ regions so that API requests and page loads are served from the nearest data center. A real-time collaboration tool or chat application achieves sub-50ms response times globally instead of 200-500ms from a single region.
Edge API and Application Servers
Teams that need full server-side logic (not just cached responses) running close to users deploy application servers on Fly.io. Unlike CDN edge functions with execution time limits, Fly.io runs full application servers — Node.js, Python, Go, Elixir — with persistent connections, WebSockets, and database access.
On-Demand Compute and Sandboxed Environments
Platforms that need to run user code or spin up isolated environments per session use Fly Machines to create and destroy micro-VMs on demand. Code execution platforms, browser testing services, and AI inference endpoints benefit from sub-second startup times and per-second billing.
Elixir and Phoenix Applications
Fly.io has a strong affinity with the Elixir/Phoenix community, as the platform's distributed architecture aligns naturally with Elixir's distributed computing model. Phoenix applications can leverage Fly.io's clustering to connect BEAM nodes across regions for real-time features and global presence.
Learning Curve
Hetzner
Low to moderate. Deploying cloud servers is straightforward via the web console, CLI (hcloud), or Terraform provider. However, the lack of managed services means you need Linux administration skills for tasks that other providers handle automatically — database setup, SSL configuration, monitoring, and security hardening. Experienced sysadmins will feel at home immediately. Developers without infrastructure experience may struggle without the guardrails that platforms like DigitalOcean or Railway provide.
Fly.io
Moderate. Deploying a basic application requires understanding the flyctl CLI, fly.toml configuration file, and concepts like regions and machines. Developers comfortable with command-line tools and Docker can deploy their first app in 15-30 minutes. Multi-region architectures, Fly Machines API, database replication strategies, and volume management require deeper study. The platform rewards infrastructure-minded developers who appreciate the flexibility of micro-VMs but may feel complex to developers accustomed to GUI-driven platforms.
FAQ
How does Hetzner compare to DigitalOcean?
Hetzner is typically 40-60% cheaper than DigitalOcean for equivalent server specifications and includes significantly more bandwidth (20TB vs 1-6TB). DigitalOcean offers more managed services (managed databases, App Platform, managed Kubernetes), better documentation with tutorials, and a more polished user experience. Choose Hetzner for maximum value when you can manage infrastructure yourself; choose DigitalOcean for a more guided experience with managed services.
Is Hetzner reliable for production workloads?
Yes. Hetzner has operated data centers since 1997 and maintains a strong uptime record with a 99.9% SLA for cloud servers and 99.99% for dedicated servers. The company owns and operates its physical infrastructure, giving it full control over hardware quality and maintenance. Many established companies run production workloads on Hetzner, including GitLab's early infrastructure and numerous European SaaS businesses.
How does Fly.io compare to Railway and Render?
Railway and Render deploy applications to a single region with simpler workflows and more polished dashboards. Fly.io deploys to multiple regions by default with Anycast routing, providing lower latency for global audiences. The trade-off is complexity: Fly.io requires CLI comfort and understanding of multi-region concepts, while Railway and Render prioritize ease of use. Choose Fly.io when global latency matters; choose Railway or Render when deployment simplicity is the priority.
What is included in Fly.io's free tier?
The free tier (Hobby plan) includes up to 3 shared-CPU-1x machines with 256MB RAM each, 3GB persistent volume storage, and 160GB outbound bandwidth per month. This is sufficient for running a small application in 1-3 regions. Additional machines, dedicated CPUs, more memory, and GPU access are billed at usage-based rates. Stopped machines do not incur compute charges, only volume storage fees.
Which is cheaper, Hetzner or Fly.io?
Hetzner starts at €3.79/mo VPS, while Fly.io starts at Free tier / Usage-based. Consider which pricing model aligns better with your team size and usage patterns — per-seat pricing adds up differently than flat-rate plans.