Fly.io alternatives: 3 open-source picks
These 3 Fly.io alternatives replace it for $0, led by Coolify, Dokploy and Dokku. All 3 are open source. License, stars and last commit checked by hand on 2026-08-10. No trials, no crippled tiers.
One-server container hosting with Git deploys, TLS, logs, limits, and a dashboard you can understand.
licenseApache-2.0
runsyour machine or their cloud
installCoolify Cloud signup or one-line install script on a fresh Linux server
dataSelf-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
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.
setupA VPS with root SSH access, open ports, DNS, and responsibility for server patching and application-data backups
facts verified 2026-08-10
A newer self-hosted PaaS for apps and databases, with previews, TLS, logs, and backups in the same control plane.
licenseApache-2.0
runsyour machine or their cloud
installDokploy Cloud signup or one-line install script on a Linux VPS
dataDokploy 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
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.
setupA VPS with at least 2 GB RAM, free ports 80/443/3000, DNS, and ongoing Docker/server administration
facts verified 2026-08-10
The original tiny Heroku-on-one-box; excellent once you are comfortable treating a server like a pet.
licenseMIT
runsyour server
installBootstrap script on a fresh supported Ubuntu or Debian VM, then add an SSH key and domain
dataApplication images, configuration, logs, and persistent Docker volumes live on the user's server; service data lives in installed database-plugin volumes
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.
setupA fresh Linux VM, sudo/SSH competence, DNS, and command-line-only administration
facts verified 2026-08-10
What each one is, in full: Coolify · Dokploy · Dokku
last updated 2026-08-10 · no votes, no pay-to-list · just what's real
how to choose a Fly.io alternative
Most proven
Coolify, with 57,000 GitHub stars — the largest community of the 3, which usually means more answers when something breaks.
Needs real ops to self-host
Coolify, Dokploy and Dokku are capable but expect someone to run a server, updates and backups. Budget for that before choosing one.
what you give up by leaving Fly.io
- global edge compute, anycast networking, orchestration, volumes, and platform operations
- global edge network
- managed databases
- autoscaling
- DDoS protection, support, and compliance
None of the picks above covers all of it. The full verdict says which gaps matter.
Fly.io alternatives at a glance
| tool | license | running it | platforms | stars | active |
|---|---|---|---|---|---|
| Coolify | Apache-2.0 | self-host, real ops | web, self-hosted | 57,000 | 2026-08 |
| Dokploy | Apache-2.0 | self-host, real ops | web, self-hosted | 36,000 | 2026-08 |
| Dokku | MIT | self-host, real ops | linux, self-hosted, cli | 32,100 | 2026-08 |
why people still pay for Fly.io
People still pay for Fly.io because hosting products sell an operations team and failure-domain diversity, not merely a deploy button. The recurring cost buys patching, certificates, isolation, secrets, builds, deploys, logs, metrics, backups, capacity, incidents, and security response, not just the visible interface.
questions about switching from Fly.io
Is there an open-source alternative to Fly.io?
Yes: Coolify, Dokploy, Dokku. Every tool on this page is open source: no trials, no crippled tiers.
Can open source really replace Fly.io?
Our verdict is YES. Coolify (57k stars), Dokploy (36k stars), Dokku (32k stars) are mature open-source replacements for Fly.io — self-host with real ops work and stop paying. The full verdict, and what you give up by switching, is at caniopensourceit.online/fly-io.
What is the most popular open-source Fly.io alternative?
By GitHub stars, Coolify (57,000). Dokploy is next with 36,000.
