FAI.me Alternative for Web-Based Linux ISO Builds

FAI.me is best understood as an unattended installer builder for Debian-family systems. OpenFactory is the FAI.me alternative when you want a web-based Linux image builder that understands prompts, app stacks, Git repositories, and validation scenarios.

What FAI.me does well

FAI.me solves a focused problem: build an installation image with selected users, SSH keys, packages, partitioning, locale, and an optional first-boot script. For unattended Debian or Ubuntu installation, that is practical and direct — and clearly popular. The FAI project announced that the 42,000th FAI.me job was submitted through the web interface, up from 20,000 in mid-2023, so the service is both mature and actively used.

Underneath the form, FAI.me is a thin, friendly face on FAI (Fully Automatic Installation), the non-interactive framework Debian and large sites use for unattended mass deployment across labs, clusters, and cloud. FAI.me lets you skip FAI's class-based config syntax and instead pick options in a browser: an installation ISO, a live ISO, or a cloud image; Debian 12 Bookworm or Debian 13 Trixie (and Ubuntu Server, Ubuntu Desktop, or Linux Mint installers); a desktop environment; SSH keys imported from GitHub, GitLab, or Salsa; a partitioning scheme; and a custom package list. The project has even extended the service to build custom live media for newer hardware, so a recent laptop that the stock installer refuses can still get a bootable image.

That focus is the strength — and the boundary. FAI.me is opinionated about being an installer. Its own documentation warns that “all data on the first disk will be overridden without any further confirmation,” which tells you it is built to provision bare metal or a fresh VM, not to assemble and prove out an application appliance. It is less natural when the desired result is a deployable app stack, a multi-node topology, or a Linux fleet image with ongoing validation.

Where OpenFactory goes broader

• Prompt input for higher-level system requirements, instead of a fixed set of form fields.
• Git repository input for app installation and packaging — point at a repo and let the builder follow its install docs.
• Multi-node stack prompts for services like Jellyfin, Nextcloud, and Proxmox labs, not just a single host.
• Scenario assertions that prove the built image behaves after boot, beyond “the installer finished.”
• A path from one image to a fleet, with deployment and compliance evidence carried along.

What 42,000 jobs tells you about the gap

A service that has produced tens of thousands of images clearly hits a real need: people want to skip hand-writing installer config and get a working ISO from a form. OpenFactory agrees with that instinct and pushes it one level higher. Instead of a fixed form whose fields cap what you can express, you describe the outcome in natural language; instead of stopping at “the installer ran,” you get validation that the system actually came up the way you asked. The popularity of FAI.me is, in a sense, the strongest argument that the next step — prompts plus proof — is worth taking.

FAI.me vs OpenFactory

Translating a FAI.me config into an OpenFactory prompt

Because FAI.me already collects structured choices, moving to OpenFactory is mostly about turning fields into a sentence and then adding the part FAI.me never had: checks. Each row in the FAI.me form maps cleanly to a clause in a prompt.

• Release and base — “Debian Bookworm” or “Ubuntu Server 24.04” stays a single phrase.
• User and SSH keys — “a non-root ops user with my SSH key” replaces the username and key-import fields.
• Package list — list the packages you want inline; the builder resolves them against the base.
• First-boot script — describe the behavior you wanted that script to produce, rather than pasting shell.
• The new part — add “and tests that confirm X is reachable after boot,” which FAI.me has no field for.

The result is a build definition you can keep, diff, and rerun — not a set of checkboxes you have to recreate from memory the next time you need a slightly different image.

Example OpenFactory prompt

Build a Debian Bookworm server image with SSH, Docker, nginx, UFW, a non-root ops user, a sample systemd service, and tests that confirm SSH, nginx, and the service health endpoint are reachable after boot.

When FAI.me is still the right call

FAI.me remains an excellent fit for its core job. If you need to install a clean Debian, Ubuntu, or Linux Mint system onto bare metal or a fresh VM with a known user, SSH key, partition layout, and package set — and you specifically want an installer that wipes the disk and provisions from scratch — the FAI.me form is fast, free, and battle-tested. For mass deployment across a lab or cluster, the full FAI framework behind it is purpose-built for exactly that. There is no reason to reach for anything heavier.

OpenFactory is the better tool when the deliverable is not just a first-disk install but a working system you can prove and reuse: an app appliance built from a GitHub repository, a self-hosted stack, a multi-node lab, or a fleet image with compliance evidence attached. For a wider survey of installer and image tools, see our SUSE Studio alternatives roundup.

If your mental model is “I need an unattended installer,” FAI.me is a sensible place to start. If your model is “I need this Linux system or app stack to exist as a repeatable, validated artifact,” start in the browser at console.openfactory.tech or read more about the OpenFactory custom Linux ISO builder.