PostmarketOS

What PostmarketOS does

postmarketOS is a community-driven, open-source Linux distribution for mobile devices founded around 2016, built directly on top of Alpine Linux. The project develops and maintains a full-stack operating system that supports mainline Linux kernels and ships multiple user interfaces (GNOME, KDE Plasma Mobile, Phosh, Sxmo), targeting device longevity by enabling software updates on hardware whose vendors have ended support. Its core technical components include the pmbootstrap build tool, generic kernel packages (mainline/stable/lts), and an immutable variant called Duranium that uses systemd image-based OS tooling with A/B partitions, dm-verity verification, and LUKS2 encryption. Supporting tooling includes dint (deviceinfo validator), coldbrew (sandboxed Homebrew-like package manager pulling from Alpine's binary repos), and the phone-harness PCB for automated hardware CI, currently integrated with CI-tron to automatically test OnePlus 6T on kernel changes.

The project operates as a non-profit, community-governed initiative with Core Contributors, Trusted Contributors, and a broader volunteer community, and is currently formalizing its structure by establishing an AISBL legal entity with the European Activism Incubator. It has no commercial pricing — the software is free and self-installed — and is funded entirely through individual donations via OpenCollective (~2,200 EUR/month recurring plus one-time gifts) and grants from organizations including NLnet/NGI Zero Core and FLOSS.fund (25,000 USD in 2026). The 2026 budget totals 62,400 EUR in income against 68,919 EUR in expenses, with 35,000 EUR allocated to Linaro-led q6voice kernel upstreaming and ~13,000 EUR to hardware-CI development. The project supports 254 devices in its testing category and 30+ in its community category, and runs a joint annual conference with Alpine Linux in Aachen, Germany.

postmarketOS's user base consists of Linux enthusiasts, privacy-conscious individuals seeking to escape advertising ecosystems embedded in mainstream mobile OSes, phone tinkerers, and industrial users (e.g., Orange's network testing team) applying the OS to end-to-end testing, security analysis, and Android troubleshooting. All hardware enablement changes are contributed upstream to projects like mainline Linux, Phosh, KDE, and GNOME, rather than forked — positioning the project as an integrator and sustainability layer within the broader Linux Mobile ecosystem rather than a standalone commercial vendor.

Name

PostmarketOS

Legal name

postmarketOS.org contributors

Website

https://postmarketos.org

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

1–10 employees

Short description

postmarketOS is a community-driven, open-source Linux distribution for mobile devices built on Alpine Linux, supporting 254+ devices across multiple user interfaces. Funded entirely by donations and grants, it extends the lifespan of consumer electronics by providing free, updatable, privacy-respecting software independent of vendor support timelines.

Ownership category

akta.pro rank

GTM type

B2C

Offering type

Software

Cost components

Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales, Others

Revenue model

1. Donations: postmarketOS receives recurring and one-time donations from individual supporters via OpenCollective. Recurrent donations are approximately 2,200 EUR per month. The project also receives one-time individual donations.
2. Grants: postmarketOS receives grant funding from organizations supporting free/open source software. Received 25,000 USD from FLOSS.fund. Applied for Horizon Europe grant for sovereign operating systems for smartphones.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels8 records

Core offering

postmarketOS is a free, open-source Linux distribution for mobile devices based on Alpine Linux. It provides multiple user interfaces (GNOME Mobile, KDE Plasma Mobile, Phosh, Sxmo) and extends device life through community-driven software updates. The project also offers Duranium, an immutable variant using systemd image-based tooling with A/B partitions, dm-verity, and LUKS2 encryption, along with development tools (pmbootstrap, dint, Coldbrew) and hardware CI infrastructure (phone-harness PCB).

Product overview

PostmarketOS is a single, unified open-source Linux distribution for mobile devices, based on Alpine Linux. The core product is the postmarketOS distribution itself, with Duranium offered as an immutable variant. User interfaces available include GNOME, KDE Plasma Mobile, Phosh, and Sxmo. Development tools include pmbootstrap (CLI development tool), dint (deviceinfo validator), and Coldbrew (homebrew-like package manager for Duranium). Hardware testing is supported via the phone harness PCB. The project follows a time-based release cycle with approximately six-month stable releases.

Differentiator

Problem solved

Functional benefit

Brands

• Duranium: An immutable variant of postmarketOS built around reliability and ease of use, using systemd's image-based OS tooling with A/B partition slots, dm-verity verification, and LUKS2 encryption.

Products and services

• postmarketOS A free and open-source Linux distribution for mobile devices and beyond, based on Alpine Linux. Extends device life by providing software updates for phones, tablets and other consumer electronics. Supports multiple user interfaces (GNOME Mobile, KDE Plasma Mobile, Phosh, Sxmo) and mainline Linux kernel. Follows a six-month time-based release cycle.
• Duranium An immutable variant of postmarketOS built on systemd's image-based OS tooling. Provides A/B partition slots for automatic rollback, dm-verity cryptographic verification, LUKS2 encryption, and system extensions (sysext) support. Uses Flatpak for applications and Coldbrew for homebrew-like package installation.
• pmbootstrap Command-line development tool for postmarketOS. Used for building, installing, and developing postmarketOS images, with subcommands for installation, chroot management, and image creation.
• Coldbrew Homebrew-like package manager for Duranium that pulls from Alpine Linux's binary package repositories. Installs software into the home directory, sandboxed via bubblewrap.
• dint PostmarketOS deviceinfo validator, linter, and documentation generator. Generates official deviceinfo reference documentation.
• Phone Harness (Hardware CI PCB) Custom PCB hardware device for automated hardware testing CI. Controls power, buttons, and power consumption readings for devices-under-test in the hardware CI system. Integrated with CI-tron for continuous integration testing on real hardware.

Quantifiable outcome

• 254 devices supported in testing category, 30+ in community category
• +2 more outcomes

Named customers7 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature7 records

Partnerships

Seven partnerships are on record, tiered minor and core.

• European Activism IncubatorminorImplementation/ SI/ Consulting Partner · 1 June 2026postmarketOS contracted the European Activism Incubator non-profit organization to help establish a legal entity (AISBL with e.V. as backup) for the project. This governance work will provide formal structure for the community organization.
• LinarocoreStrategic or Co-development Partner · 8 May 2026postmarketOS hired Linaro to rework q6voice patches for Qualcomm devices to implement codec2codec support in the mainline Linux kernel. This is a 35,000 EUR project to enable upstreaming of voice call audio drivers, reducing technical debt across the Linux Mobile ecosystem. Linaro was chosen because Minecrell (original q6voiced author) now works there.
• Alpine LinuxcoreStrategic or Co-development PartnerpostmarketOS is directly based on Alpine Linux and contributes heavily to Alpine's package repositories. Alpine Linux joined postmarketOS's annual conference making it 'The postmarketOS and Alpine Linux Conference'. The two projects work closely together on many technical topics.
• CI-tron / Martin R. (Mupuf)coreTechnology or IntegrationMartin R. from CI-tron collaborated with postmarketOS to integrate the phone-harness PCB into CI-tron for automated hardware testing. CI-tron is the continuous integration system used for testing on real hardware.
• PhoshcoreStrategic or Co-development PartnerPhosh is the primary phone UI for GNOME Mobile, heavily used in postmarketOS. postmarketOS works closely with Phosh upstream, contributing to Phosh Mobile Settings, conf-tweaks backend, and other improvements. Guido (agx) from Phosh contributes to postmarketOS.
• KDE / Plasma MobilecoreStrategic or Co-development PartnerKDE Plasma Mobile is one of the user interfaces supported by postmarketOS. Bart Ribbers maintains KDE in both Alpine Linux and postmarketOS. Devin Lin, Plasma Mobile lead developer, is active in the postmarketOS community.
• Sendero LinuxminorChannel Partner/ Reseller/ DistributorSendero Linux is a commercial reseller that sells OnePlus 6T phones with postmarketOS pre-installed. This is described as a small-scale arrangement compared to potential larger OEM partnerships.

Scale indicators7 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Sailfish OS (Jolla): Mobile Linux OS developed by Jolla, derived from MeeGo and targeted at privacy-conscious users and specific OEMs (Sony Xperia, Jolla C2). Directly comparable as a Linux-based mobile OS with an alternative UI shell, serving a similar privacy-minded audience but with a partly commercial model.
• UBports / Ubuntu Touch: Community-driven mobile Linux OS continuation of Ubuntu Touch, supporting multiple devices and user interfaces. Most direct peer — same target users (Linux enthusiasts on phones), same distribution model (volunteer + donations), and competing for the same niche of post-vendor-support hardware.
• GrapheneOS: Privacy and security-focused mobile OS based on Android, targeting technically sophisticated users. Same audience as postmarketOS (privacy-conscious phone users) but with a hardened-Android rather than mainline-Linux approach.
• Mobian: Debian-based Linux distribution for mobile phones, using Phosh as the default UI. Direct peer — same niche (Linux on phones), same contributor overlap, and often referenced together with postmarketOS in the Linux mobile ecosystem.
• LineageOS: Open-source Android distribution supporting many devices beyond vendor support windows. Highly comparable mission (extending device life through open-source community OS) and the dominant community mobile OS that postmarketOS implicitly competes with for privacy-conscious users.
• /e/OS (eFoundation): De-Googled Android-based mobile OS focused on privacy, offered by eFoundation. Comparable target market (privacy-conscious users escaping Big Tech OSes) but uses Android (LineageOS) as the base rather than mainline Linux — a strategic alternative postmarketOS users might choose.
• PureOS (Purism): Privacy-focused Linux distribution from Purism that runs on the Librem 5 phone. Comparable as a privacy-first mobile Linux OS, though tightly coupled to a specific hardware vendor, whereas postmarketOS is hardware-agnostic.

Emerging players

• Phosh: GNOME-based mobile shell (UI environment) that postmarketOS supports as one of its primary interfaces. Comparable ecosystem participant — Phosh is upstream to postmarketOS, and the projects share contributors (e.g., agx) and a mutual partnership, though Phosh is a UI shell rather than a full OS.
• CalyxOS: Privacy-focused Android distribution from the Calyx Institute. Comparable privacy-first positioning but a smaller, Google-Pixel-only footprint; users weighing privacy OSes often evaluate CalyxOS alongside Linux-phone alternatives.
• KDE Plasma Mobile: KDE's mobile user interface, supported by postmarketOS as a primary interface option. Ecosystem partner — Plasma Mobile lead Devin Lin noted "every project in Linux Mobile has some connection to postmarketOS," and Bart Ribbers maintains KDE in both Alpine and postmarketOS.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/postmarketos

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about PostmarketOS