Fly.io vs Coolify
A detailed comparison to help you choose between Fly.io and Coolify.
Quick Verdict
4.0/5
Fly.io
0 reviews
4.2/5
Coolify
0 reviews
Coolify is rated higher (4.2 vs 4.0). Fly.io runs Docker containers on bare metal in 35+ cities globally. Machines run close to users — sub-50ms latency from most locations. Supports any language and framework. Coolify is a free, open source self-hosted platform for deploying apps, databases, and services on your own servers. Supports any Docker image, one-click databases, and automated SSL.
Fly.io Deploy apps globally with sub-50ms latency | Coolify Self-hosted open source Heroku/Netlify alternative | |
|---|---|---|
| Overview | ||
| Rating | 4.0 (0 reviews) | 4.2 (0 reviews)✓ |
| Pricing model | usage-based | freemium |
| Starting price | From $2.19/mo | Free tier available✓ |
| Best for | Latency-sensitive applications — APIs, real-time apps and globally distributed backends — run by teams comfortable with a CLI-first platform and pay-as-you-go pricing | Solo developers and small teams with Linux skills who want Heroku-style deploys on their own cheap servers without per-app PaaS pricing |
| Specifications (entry plan) | ||
| CPU cores | 1 vCPU | — |
| RAM | 0 GB | — |
| Storage | 0 GB | — |
| Bandwidth | 0 TB/mo | — |
| SLA uptime | 99.9% | — |
| Data-center count | 17 | — |
| €/vCPU/mo | €2.19 | — |
| Features | ||
| IPv6 | ✓ | |
| DDoS protection | ✓ | |
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ✓ | |
| Free tier | ||
| Data-center locations | ||
| Regions | Netherlands, Sweden, France, Germany, UK, US, Canada, Brazil, South Africa, Japan, Singapore, Australia | Bring your own servers; Cloud control plane on Hetzner in Falkenstein, Germany |
| Tags | ||
| Tags | free tiermanaged optionipv6eu datacenterus datacenterapac datacenterapi accessprivate networking | free tieropen sourceself hostable |
| Visit Fly.io → | Visit Coolify → | |
Fly.io
Pros
- + Fully published pricing for every billed resource, with worked example bills
- + Cheap always-on compute — $2.19/30 days for the smallest Machine in the cheapest regions
- + 17 regions on Fly's own hardware with Anycast routing and per-second billing
- + Strong ecosystem: Managed Postgres, Fly Kubernetes, Tigris S3-compatible object storage, Upstash extensions on one invoice
- + Concrete Enterprise SLA terms (99.9%, 15-minute urgent response) published openly
Cons
- - Free tier replaced by a tight trial (2 VM hours or 7 days)
- - Managed Postgres starts at $38/month — services are priced like a managed PaaS, not like the VMs
- - CLI-first workflow with real conceptual overhead (Machines, Apps, fly-replay, 6PN networking)
- - Uptime SLA only covers Enterprise plans; SLA downtime definition excludes hacking and virus attacks
- - Region count has shrunk from the widely quoted 35+ to 17, and prices vary by region
Coolify
Pros
- + Self-hosted is free forever with the complete feature set — unlimited servers, deployments and team members, Apache 2.0, no feature paywall
- + Coolify Cloud is $5/month including 2 connected servers ($3/month per extra server) — a flat fee that takes no margin on your compute
- + Deploys apps, databases and 280+ one-click services with automatic Let's Encrypt TLS and git push workflows on any SSH-reachable Linux host
- + Open codebase with a large, active community (20k+ Discord members) and near-daily development
Cons
- - You own server security, patching, firewalling and workload backups — the platform only removes deployment tedium
- - No uptime SLA, no enterprise support tier, SSO or compliance package; support is community plus limited email on Cloud
- - Fast-moving project: frequent releases and occasional upgrade friction, with a busy issue tracker
- - Cloud base plan covers only 2 servers and each team needs its own subscription
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