Fly.io wants a subscription.
These cost $0.
3 free alternatives to Fly.io, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.
Fly.io vs Free Alternatives Matrix
Quick side-by-side comparison · $0/mo vs paid
| Alternative | Type | License | Where It Runs | Stars | Head-to-Head |
|---|---|---|---|---|---|
| Coolify | open source | Apache-2.0 | Local or hosted | ★ 57k | Fly.io vs Coolify → |
| Dokploy | open source | Apache-2.0 | Local or hosted | ★ 36k | Fly.io vs Dokploy → |
| Dokku | open source | MIT | Self-host | ★ 32k | Fly.io vs Dokku → |
The picks
3 open source · ranked by fit
- 01
Coolify
open sourceApache-2.0Local or hosted57kaug 2026One-server container hosting with Git deploys, TLS, logs, limits, and a dashboard you can understand.
The catch vs Fly.ioCoolify gives one server a capable deployment control plane, but it cannot reproduce Fly.io's multi-region edge placement, Anycast networking, or provider-operated global infrastructure.
Install, platforms & data +
- platforms
- webself-hostedself-host, real ops
- install
- Coolify Cloud signup or one-line install script on a fresh Linux server
- setup
- A VPS with root SSH access, open ports, DNS, and responsibility for server patching and application-data backups
- your data
- Self-hosted control data is in an internal PostgreSQL container; deployed apps and databases remain in Docker containers, volumes, and configuration on the user's servers
- checked
- 2026-08-10
- 02
Dokploy
open sourceApache-2.0Local or hosted36kaug 2026A newer self-hosted PaaS for apps and databases, with previews, TLS, logs, and backups in the same control plane.
The catch vs Fly.ioDokploy brings apps, databases, previews, and backups to your own servers, but global placement, Anycast networking, and provider-managed capacity are not included.
Install, platforms & data +
- platforms
- webself-hostedself-host, real ops
- install
- Dokploy Cloud signup or one-line install script on a Linux VPS
- setup
- A VPS with at least 2 GB RAM, free ports 80/443/3000, DNS, and ongoing Docker/server administration
- your data
- Dokploy metadata is stored in PostgreSQL; application and database data lives in Docker named volumes or bind mounts on the deployment servers, with optional S3 backups
- checked
- 2026-08-10
- 03
Dokku
open sourceMITSelf-host32kaug 2026The original tiny Heroku-on-one-box; excellent once you are comfortable treating a server like a pet.
The catch vs Fly.ioDokku is excellent on one box, but its CLI-first, single-host model lacks Fly.io's global regions, edge networking, and managed operational surface.
Install, platforms & data +
- platforms
- desktopself-hostedcliself-host, real ops
- install
- Bootstrap script on a fresh supported Ubuntu or Debian VM, then add an SSH key and domain
- setup
- A fresh Linux VM, sudo/SSH competence, DNS, and command-line-only administration
- your data
- Application images, configuration, logs, and persistent Docker volumes live on the user's server; service data lives in installed database-plugin volumes
- checked
- 2026-08-10
Frequently Asked Questions
Direct answers · Fly.io open-source replacements
What is the best free alternative to Fly.io?+
The top free alternative to Fly.io is Coolify (open source, Apache-2.0). One-server container hosting with Git deploys, TLS, logs, limits, and a dashboard you can understand. Other popular Fly.io replacements include Dokploy, Dokku.
Can I self-host a free replacement for Fly.io?+
Yes. Of the 3 free alternatives to Fly.io, 3 can be self-hosted on your own server or local machine: Coolify (Apache-2.0), Dokploy (Apache-2.0), Dokku (MIT).
Should I vibe-code or build my own Fly.io clone from scratch?+
Our build verdict for Fly.io is NOT REALLY (use a free alternative, save the tokens). A consolation build is possible, but the paid product's decisive value sits outside a solo rebuild. For Fly.io, deploy one container on a self-owned host and expose operational limits clearly. The hard boundary is global edge compute, anycast networking, orchestration, volumes, and platform operations, plus infrastructure scale, operations, and reliability.
What is the catch when switching from Fly.io to Coolify?+
Coolify gives one server a capable deployment control plane, but it cannot reproduce Fly.io's multi-region edge placement, Anycast networking, or provider-operated global infrastructure.
