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Logo of SerenityOS.png
Serenity OS Busy Screenshot, 2021-08-27.png
DeveloperAndreas Kling and the SerenityOS community
Written inC++
OS familyUnix-like
Working stateCurrent
Source modelOpen source
Initial releaseOctober 10, 2018; 2 years ago (2018-10-10)
Available inEnglish
Package managerNone
Platformsx86, x86-64
user interface

SerenityOS is a free and open source desktop operating system in continuous development since 2018. Initially the one-man project of Swedish programmer Andreas Kling, SerenityOS is now developed by a community of hobbyists. The system supports the x86 and x86-64 instruction sets, features a preemptive kernel, and hosts multiple complex applications including its own web browser and integrated development environment (IDE).[1][2]


SerenityOS aims to be a modern Unix-like operating system, yet with a look and feel that emulates 1990s operating systems such as Microsoft Windows and Mac OS.[3] In an approach contrasting with similar projects such as Haiku, every line of code in SerenityOS from the kernel to the web browser is purpose-written for the system by its contributors.[1]

The relative popularity of SerenityOS compared to other hobbyist systems is in part due to the modest success of Kling's YouTube channel, where he uploads videos of him developing parts of the system alongside monthly progress updates.[4]


Kling began developing the project in part to aid his recovery from addiction, and as such the name of the project derives from the Serenity Prayer.[5] As of 2021, Kling works full-time on SerenityOS, supported by community donations.[5]


Jim Salter of Ars Technica regarded the file system his least favorite feature of the operating system. Compared to TempleOS (another operating system well known in the hobbyist communty), he considered it more accessible.[2] For less technical users, that are looking for a mid–to–late 90s reminissant visual style, Chicago95 or the Redmond Project has been recommended instead.[6]


  1. ^ a b Kling, Andreas. "SerenityOS". Retrieved 2021-08-26.
  2. ^ a b Salter, Jim (2021-08-18). "Not-a-Linux distro review: SerenityOS is a Unix-y love letter to the '90s". Ars Technica. Archived from the original on 2021-08-21. Retrieved 2021-08-18.
  3. ^ TIVI. "Ohjelmoija kehitti c++:lla uuden käyttöjärjestelmän, joka jäljittelee 1990-lukua". Tivi (in Finnish). Archived from the original on 2020-05-16. Retrieved 2021-08-18.
  4. ^ By (2020-02-24). "Reaching Serenity: Porting Git To A Homebrew Operating System". Hackaday. Archived from the original on 2020-02-24. Retrieved 2021-08-18.
  5. ^ a b Kling, Andreas (2021-05-28). "I quit my job to focus on SerenityOS full time".
  6. ^ Beschizza, Rob (2021-08-17). "A refined 90s-style operating system you can actually use". Boing Boing. Archived from the original on 2021-08-21. Retrieved 2021-08-18.

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