FreeDOS

What FreeDOS does

FreeDOS is an unincorporated, volunteer-driven open source project that develops and maintains a free, DOS-compatible general purpose operating system. Founded by Jim Hall on June 29, 1994, the project produces the FreeDOS kernel (currently Kernel 2046, version 2.46), the FreeCOM command shell, the FDIMPLES package manager, FDNPKG16 network package manager, and a curated set of open source DOS applications including editors (Edit, Edlin, Freemacs), development tools (OpenWatcom C compiler, Bywater BASIC, GW-BASIC, NASM assembler, UPX packer), media players, and bundled games. Distributable artifacts include a LiveCD ISO image, a full installer, and a floppy-only edition targeted at vintage 286+ IBM PC hardware, all licensed under GNU GPL or compatible open source licenses. Code is hosted on GitLab and mirrored on Ibiblio; email lists are hosted on SourceForge.

The project's user base is fragmented and hobbyist-oriented, comprising retro computing enthusiasts who play classic DOS games (Wolfenstein 3D, Doom, Commander Keen), individuals and organizations maintaining legacy DOS business applications, programming learners using FreeDOS as a teaching environment, and embedded systems developers building single-purpose control applications (cash registers, terminals, PBX systems, and notably the Russian SAVPE electric train control system). FreeDOS has no formal corporate entity, no employees in the conventional sense, no venture capital, and no patent estate; the FreeDOS trademark is held as a common law mark by Jim Hall, formally claimed in November 2001 but not federally registered.

FreeDOS generates no license revenue — the software is free and open source. Cash inflows consist of tiered Patreon donations to Jim Hall (ranging from $1/month for "Fans" to $100/month for "Gold Sponsors" with logo placement), direct PayPal donations, and a Zazzle merchandise storefront established in 2011 that the project announced plans to close in August 2026. The go-to-market model is community-led: awareness and engagement are driven through the freedos.org website, low-volume email lists (freedos-user, freedos-devel), a Facebook group, YouTube tutorials, and Patreon community management. The project has operated continuously for 32 years, with its most recent major distribution (FreeDOS 1.3 RC4) released April 30, 2021, and ongoing incremental kernel and tooling updates as recently as June-July 2026.

Name

FreeDOS

Legal name

FreeDOS Project

Website

https://freedos.org

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

1–10 employees

Short description

FreeDOS is a volunteer-run open source project that develops and maintains a free DOS-compatible operating system for retro computing enthusiasts, legacy software users, programming learners, and embedded systems developers, distributed under GPL and funded by individual donations.

Ownership category

akta.pro rank

Headquarters

HQ city

Boston

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Software

Cost components

Personnel, Technology or R&D, Infrastructure, Operations

Revenue model

1. Donations via Patreon: Community members support lead developer Jim Hall through Patreon with tiered membership ($1/month for Fans, $5/month for Early Access, $10/month for Supporters with name listed, $20/month for Gold Supporters thanked in videos, $40/month for Sponsors with name and link, $100/month for Gold Sponsors with logo and link).
2. Merchandise Sales: FreeDOS merchandise (stickers, t-shirts, mugs, ties) sold through Zazzle store. Store was being planned for closure as of July 2026.
3. PayPal Donations: Direct PayPal donations to the FreeDOS project via paypal.me/freedosproject.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels6 records

Core offering

FreeDOS provides a free, open source DOS-compatible operating system for running legacy DOS applications, playing classic DOS games (Wolfenstein 3D, Doom, Commander Keen, Jill of the Jungle, Duke Nukem), and developing new DOS programs. The distribution bundles the FreeDOS Kernel with the FreeCOM command shell, the FDIMPLES interactive package manager, open source development tools (OpenWatcom C compiler, NASM assembler, Bywater BASIC, GW-BASIC, editors), games, and multimedia players. Multiple installation formats include a LiveCD ISO for virtual machines, a standard hard-drive installer, and a floppy-only edition for retro 286+ PC hardware.

Product overview

FreeDOS is an open source DOS-compatible operating system distributed as multiple products: the core FreeDOS kernel with FreeCOM shell, the FDIMPLES package manager for installing/removing software, text editors (Edit, Edlin, Freemacs), development tools (OpenWatcom C compiler, Bywater BASIC, GW-BASIC, NASM assembler, UPX packer), multimedia players (Mplayer, Open Cubic Player), and various DOS games. The project provides distributions as LiveCD, Floppy-Only Edition, and full installations with optional packages. Documentation includes ebooks on C programming and getting started guides.

Differentiator

Problem solved

Functional benefit

Products and services

• FreeDOS 1.4 The latest release of the open source DOS-compatible general purpose operating system for playing classic DOS games, running legacy business software, or writing new DOS programs.
• FreeDOS 1.3 RC4 Full-featured FreeDOS 1.3 Release Candidate 4 distribution including LiveCD environment, updated installer, and bundled open source applications and games.
• FreeDOS 1.0 The milestone 1.0 release of the FreeDOS distribution.
• FreeDOS LiveCD A bootable LiveCD ISO image allowing users to run FreeDOS without installation in a virtual machine such as QEMU or VirtualBox.
• FreeDOS Floppy-Only Edition A minimal FreeDOS distribution installable from floppy disks for classic PC hardware (286+ with EGA graphics) without a CD-ROM drive.
• FreeDOS Kernel The core component of FreeDOS that provides DOS services including program loading, file and device I/O, memory management, and the INT 21h API that most DOS software uses.
• FDIMPLES Package Manager FreeDOS Installer - My Package List Editor Software, an interactive package manager for installing and removing FreeDOS software packages.
• FDNPKG16 Network Package Manager A 16-bit Network Package Manager for FreeDOS, open source under MIT license.
• Writing FreeDOS Programs in C An ebook teaching how to write programs in C programming language for FreeDOS, covering command line programs through turn-based games.
• Get Started with FreeDOS An ebook with how-to guides covering FreeDOS navigation, environment variables, batch files, package management, and configuration.

Quantifiable outcome

• 32 years of continuous development since 1994
• +1 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• ZazzleminorChannel Partner/ Reseller/ Distributor · 1 January 2026Zazzle hosts the FreeDOS merchandise store selling stickers, t-shirts, mugs, and other items with the FreeDOS logo. The store was established in 2011.

Scale indicators4 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• DOSBox: Open source DOS emulator widely used for running legacy DOS games and applications on modern hardware. Directly comparable to FreeDOS in target use case (DOS software compatibility) and community-driven model, though DOSBox emulates DOS inside a host OS whereas FreeDOS is a standalone OS.
• DOSBox-X: Fork of DOSBox focused on full DOS environment emulation with additional DOS shell features and hardware support. Closely comparable to FreeDOS in targeting complete DOS functionality rather than game-only compatibility, and serves the same retro-computing and legacy-software user base.

Emerging players

• KolibriOS: Small open source x86 operating system written primarily in assembly. Comparable to FreeDOS as a small-footprint, community-developed alternative OS targeting hobbyists and educational users.
• Haiku OS: Open source operating system reimplementing BeOS, developed by a volunteer community. Comparable to FreeDOS as a community-driven alternative OS targeting users interested in a non-mainstream, lightweight computing environment.
• 86Box: Open source low-level IBM PC emulator focused on accurate reproduction of vintage hardware. Comparable to FreeDOS in serving the retro-computing and DOS-software user base, particularly users wanting to run original DOS environments on emulated classic hardware.
• ReactOS: Open source operating system aiming for binary compatibility with Windows NT, developed by a volunteer community with similar governance and funding (donations, Patreon). Comparable as a community-driven alternative OS project, though targeting Windows rather than DOS.
• PCem: Open source emulator for vintage IBM PC-compatible hardware. Comparable to FreeDOS as part of the same retro-computing and legacy-software ecosystem that FreeDOS serves.

Broad incumbents

• DR-DOS: Historically significant DOS-compatible operating system originally developed by Digital Research and later Novell/ Caldera. Comparable to FreeDOS as a DOS-compatible OS that competed with MS-DOS, though DR-DOS is now defunct/legacy rather than actively maintained.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• GitHubgithub.com/FDOS
• YouTubeyoutube.com/freedosproject
• Facebookfacebook.com/groups/freedosproject
• Xx.com/freedos_project

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 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 FreeDOS