Open Source Initiative
FormationFebruary 1998 (25 years ago) (1998-02)
Area served
Executive Director
Stefano Maffulli (September 2021 - present)

The Open Source Initiative (OSI) is the steward of the Open Source Definition, the set of rules that define open source software.[4] It is a California public-benefit nonprofit corporation, with 501(c)(3) tax-exempt status.

The organization was founded in late February 1998 by Bruce Perens and Eric S. Raymond,[5] part of a group inspired by the Netscape Communications Corporation publishing the source code for its flagship Netscape Communicator product. Later, in August 1998, the organization added a board of directors.

Raymond was president from its founding until February 2005, followed briefly by Russ Nelson and then Michael Tiemann. In May 2012, the new board elected Simon Phipps as president[6] and in May 2015 Allison Randal was elected as president[7] when Phipps stepped down in preparation for the 2016 end of his board term.[8] Phipps became President again in September 2017.[9] Molly de Blanc was elected[10] President in May, 2019, followed by Josh Simmons[11] in May, 2020.

The organization appointed Stefano Maffulli as its executive director in September 2021,[12] at the end of a process set by the board of directors to transform the organization. Josh Simmons is chair of the board.


As a campaign of sorts, "open source" was launched in 1998 by Christine Peterson, Jon "maddog" Hall, Larry Augustin, Eric S. Raymond, Bruce Perens, and others.[5][13]

The group adopted the Open Source Definition for open-source software, based on the Debian Free Software Guidelines. They also established the Open Source Initiative (OSI) as a steward organization for the movement. However, they were unsuccessful in their attempt to secure a trademark for 'open source' to control the use of the term.[14] In 2008, in an apparent effort to reform governance of the organization, the OSI Board invited 50 individuals to join a "Charter Members" group; by 26 July 2008, 42 of the original invitees had accepted the invitations. The full membership of the Charter Members has never been publicly revealed, and the Charter Members group communicated by way of a closed-subscription mailing list, "osi-discuss", with non-public archives.[15]

In 2012, under the leadership of OSI director and then-president Simon Phipps, the OSI began transitioning towards a membership-based governance structure. The OSI initiated an Affiliate Membership program for "government-recognized non-profit charitable and not-for-profit industry associations and academic institutions anywhere in the world".[16] Subsequently, the OSI announced an Individual Membership program[17] and listed a number of Corporate Sponsors.[18]

On November 8, 2013, OSI appointed Patrick Masson as its General Manager.[19] As of August, 2020, Deb Nicholson is the Interim General Manager.[20] Under the direction of Deborah Nicholson, the interim manager, the voting and election was held with results and then halted and set for re-election due to vulnerabilities in the election process. "This week we found a vulnerability in our voting processes that was exploited and had an impact on the outcome of the recent Board Election."[21] No election results or further updates are posted as of June 2021.

In January 2020, founder Bruce Perens left OSI over controversy regarding a new license (the Cryptographic Autonomy License), which had been proposed for the OSI's approval.[22] Later, in August 2020, Perens elaborated on his concerns: "We created a tower of babel of licenses. We did not design-in license compliance, and we have a tremendous noncompliance problem that isn't getting better. We can't afford to sue our copyright infringers."[23]

Eric S. Raymond, another co-founder of the OSI, was later banned from the OSI mailing list in March 2020.[24]

In November 2020 the board of directors announced a search for an executive director[25] which was concluded in September 2021 with the appointment of Stefano Maffulli. At the same time, the role of president of the board was abandoned in favor of chair of the board.

Relationship with the free software movement

Both the modern free software movement and the Open Source Initiative were born from a common history of Unix, Internet free software, and the hacker culture, but their basic goals and philosophy differ, the free software movement being more focused on the ethics of software, and their open source counterparts being more focused on practical benefits. The Open Source Initiative chose the term "open source," in founding member Michael Tiemann's words, to "dump the moralizing and confrontational attitude that had been associated with 'free software'" and instead promote open source ideas on "pragmatic, business-case grounds."[26]

As early as 1999, OSI co-founder Perens objected to the "schism" that was developing between supporters of the Free Software Foundation (FSF) and the OSI because of their disparate approaches. Perens had hoped the OSI would merely serve as an "introduction" to FSF principles for "non-hackers."[27] Richard Stallman of FSF has sharply criticized the OSI for its pragmatic focus and for ignoring what he considers the central "ethical imperative" and emphasis on "freedom" underlying free software as he defines it.[28] Nevertheless, Stallman has described his free software movement and the Open Source Initiative as separate camps within the same broad free-software community and acknowledged that despite philosophical differences, proponents of open source and free software "often work together on practical projects."[28]

On March 23, 2021, in response to Richard Stallman's reappointment to the Board of the Free Software Foundation, the OSI released a statement calling upon the FSF to "hold Stallman responsible for past behavior, remove him from the organization's leadership and work to address the harm he caused to all those he has excluded: those he considers less worthy, and those he has hurt with his words and actions." The OSI also stated that they would not participate in any events that include Stallman and "cannot collaborate with the Free Software Foundation until Stallman is removed from the organization's leadership."[29]

Board members

As of July 2023, the Open Source Initiative Board of Directors is:[30]

Past board members include:[31]

See also


  1. ^ "Charity Navigator - Unrated Profile for Open Source Initiative". Archived from the original on 2019-05-12.
  2. ^ "Charity Navigator - Unrated Profile for Open Source Initiative". Archived from the original on 2019-05-12.
  3. ^ "Charity Navigator - Unrated Profile for Open Source Initiative". Archived from the original on 2019-05-12.
  4. ^ "About the Open Source Initiative | Open Source Initiative". Archived from the original on 2019-05-12.
  5. ^ a b "History of the OSI".
  6. ^ "OSI Board Elects New Officers". 2012-05-21. Archived from the original on 2012-05-27. Retrieved 2012-05-23.
  7. ^ Phipps, Simon. "Outgoing President tweet". Retrieved 13 May 2015.
  8. ^ Phipps, Simon. "Handing On The Baton". Open Source Initiative. Archived from the original on 21 November 2015. Retrieved 15 May 2015.
  9. ^ Randal, Allison (28 September 2017). "Transitions in Leadership". Archived from the original on 1 October 2017. Retrieved 10 October 2017.
  10. ^ "OSI Board Evolution | Open Source Initiative".
  11. ^ "Tweet about 2020 Officer Elections".
  12. ^ Vaughan-Nichols, Steven J. "The Open Source Initiative names Stefano Maffulli as its first Executive Director". ZDNet. Retrieved 2021-09-20.
  13. ^ "A Look Back at 10 Years of OSI". Archived from the original on 2018-04-29.
  14. ^ Announcement of losing 'open source' trademark
  15. ^ "OSI Charter Member Discuss List". Archived from the original on 2013-04-21. Retrieved 2012-06-19.
  16. ^ "Become an OSI Affiliate".
  17. ^ "OSI Announces Individual Membership".
  18. ^ "OSI Corporate Sponsors".
  19. ^ "OSI Names New General Manager". LWN. 2013-10-23. Retrieved 2014-01-27.
  20. ^ "Deb Nicholson to Join Open Source Initiative as Interim General Manager". Software Freedom Conservancy. Retrieved 2021-02-16.
  21. ^ "OSI election update".
  22. ^ "OSI co-founder leaves initiative over new license".
  23. ^ Perens, Bruce (2020-08-24). "What comes after Open Source?". DebConf20. Retrieved 2021-06-01.
  24. ^ "Co-founder of OSI Banned from Mailing Lists".
  25. ^ "OSI Seeks to Hire Executive Director | Open Source Initiative". Retrieved 2021-09-20.
  26. ^ Tiemann, Michael (2006-09-19). "History of the OSI". Open Source Initiative. Retrieved 2009-04-25.
  27. ^ "It's Time to Talk About Free Software Again". 2014-11-19. Archived from the original on 2014-07-16. Retrieved 2014-11-19.
  28. ^ a b Stallman, Richard (2009-04-21). "Why 'Open Source' Misses the Point of Free Software". Free Software Foundation. Retrieved 2009-04-25.
  29. ^ "OSI Response to RMS's reappointment to the Board of the Free Software Foundation | Open Source Initiative". Retrieved 2021-04-03.
  30. ^ "Current composition of OSI board of directors". Open Source Initiative.((cite web)): CS1 maint: url-status (link)
  31. ^ "OSI Emeritus Members | Open Source Initiative". Open Source Initiative. Retrieved 17 February 2019.
  32. ^ "2009 OSI Board Elections held in April". Archived from the original on 2022-04-07. Retrieved 2009-05-23.