Fly.io alternatives: 3 free & open-source picks
Compare recorded free and open-source options, their capabilities and operating requirements. Source dates are shown below; licenses, hosted limits and project activity can change.
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
latest recorded source check 2026-08-10 · check current terms at the source
| 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 |
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 these alternatives
Is there a free alternative to Fly.io?
Yes: Coolify, Dokploy, Dokku. These are recorded free or open-source options. Compare their feature limits, licenses, hosting costs and current availability before choosing.
Should I just build my own Fly.io?
Our verdict is NOT REALLY. 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. Review the scope, implementation prompt and trade-offs in the Fly.io build guide.
