AppJail

Self-hosted

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Freedom report

One barScore 5.3

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely0 of 6 device platforms
DocumentedPlans, terms and facts published

AppJail is ranked #24 of 32 in container engines on Freedom251. It runs on Self-hosted.

Compared on container engines

Free plan: Yes
Rootless mode: No
Image building: Yes
Image format: both
Runtime interface: other
Supported host OS: FreeBSD

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The record

Purpose: AppJail is an open-source BSD-3 licensed framework for creating isolated, portable environments using FreeBSD jails.
Audience: The project says it aims to simplify jail workflows for system administrators and developers.
Installation: AppJail can be installed from source, as the sysutils/appjail-devel port, or as the sysutils/appjail package.
Jail features: It supports thin and thick jails, jail dependencies, startup ordering, and parallel startup of healthcheckers, jails, and NAT.
Storage and networking: Documented capabilities include UFS and ZFS, NAT, port forwarding, IPv4 and IPv6, virtual networks, bridges, and VNET.
Application deployment: Makejail files automate jail creation by generating an InitScript and a BuildScript.
OCI integration: AppJail supports deploying OCI-compatible containers into FreeBSD jails; its OCI command requires buildah and jq.
Linux jails: Linux distributions can run in jails for isolated applications unavailable in the FreeBSD ports collection, and this method requires debootstrap.
Secrets: AppJail documents encrypted secrets on disk and unencrypted secrets in a non-swap-backed in-memory filesystem, mounted read-only for jails by the recommended option.
Unprivileged use: The handbook recommends allowing unprivileged users to run AppJail through a configured privilege tool such as doas, sudo, or FreeBSD's mdo.
Notable limitation: TinyJails are identified as experimental, and raw-image jail backups require ZFS.
Support: The project repository links to a support page for users who need help with AppJail.
What it does: AppJail is an open-source BSD-3 licensed framework for creating isolated, portable environments using FreeBSD jails.
Intended users: The project says its goal is to simplify jail workflows for sysadmins and developers.

Where it ranks on Freedom251

Best Container Engines in 2026#24 of 32

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Sources

appjail.readthedocs.io/en/latest/· checked 9 Oct 2026
appjail.readthedocs.io/en/latest/install/· checked 9 Oct 2026
appjail.readthedocs.io/en/latest/makejails/intro/· checked 9 Oct 2026
appjail.readthedocs.io/en/latest/OCI/· checked 9 Oct 2026
appjail.readthedocs.io/en/latest/linux/· checked 9 Oct 2026
appjail.readthedocs.io/en/latest/secrets/· checked 9 Oct 2026
appjail.readthedocs.io/en/latest/trusted-users/· checked 9 Oct 2026
github.com/DtxdF/AppJail/· checked 9 Oct 2026
appjail.readthedocs.io/en/latest/healthcheckers/· checked 9 Oct 2026