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GSoC 2026: 183 organizations took 1,140 contributors

Choose your GSoC organization
with eleven years of data.

Every organization since 2016: how many contributors each one took, what they built, and where their community talks. Independent and free.

PopularPythonJavaScriptC++RustMachine learningNew in 2026

GSoC 2026 · 183 organizations

Where the 1,140 contributor slots went

Science and medicine356

End user applications243

Programming languages137

Operating systems96

Web85

Data61

Security50

Machine Learning for Science (ML4SCI)33NumFOCUS27CERN-HSF26R project for statistical computing25INCF23UC OSPO15The Julia Language12Alaska8OpenMRS8CGAL Project7Genome Assembly and Annotation7IOOS7National Resource for Network Biology (NRNB)7Open Science Labs7Open Technologies Alliance - GFOSS7CircuitVerse.org6cBioPortal for Cancer Genomics5DeepChem5Invesalius5Open Science Initiative for Perfusion Imaging5OpenAstronomy5stdlib5SymPy5The ns-3 Network Simulator Project5Cuneiform Digital Library Initiative (CDLI)4GeomScale4Global Alliance for Genomics and Health4LibreHealth4OpenELIS Global4PEcAn Project4SageMath4Ste||ar group4ArduPilot3Gambit: The package for computation in game theory3GNU Radio3gprMax3Internet Archive3JabRef e.V.3LibreCube Initiative3MDAnalysis3Neuroinformatics Unit3Open Food Facts3Open Genome Informatics3OpenMS3Project Mesa3QC-Devs3Stichting SU2352°North Spatial Information Research GmbH2GNU Octave2MalariaGEN2MLLAM2preCICE2TARDIS RT Collaboration2Open HealthCare Network1St. Jude Children's Research Hospital1FOSSASIA24AOSSIE22VideoLAN15C2SI14Python Software Foundation13The Mifos Initiative13KDE Community12Zulip11Sugar Labs10Blender Foundation8Open Robotics8Oppia Foundation7CCExtractor Development6OSGeo (Open Source Geospatial Foundation)6FreeCAD5Graphite5Joplin5OpenWISP5dora-rs4GNU Image Manipulation Program4Open Transit Software Foundation4ScummVM4United Nations Office of Information Communication Technology4Uramaki LAB4Joomla!3Kiwix3Learning Equality3Learning Unlimited3LibreOffice3Mixxx3omegaUp3Submitty3AnkiDroid2Neovim2Tiled2LLVM Compiler Infrastructure13The Rust Foundation13International Catrobat Association12checkstyle6Eclipse Foundation6MetaCall6Processing Foundation6Accord Project5Dart5GNU Compiler Collection (GCC)5Jenkins5Pharo Consortium5Ruby5The P4 Language Consortium5Fortran-lang4Git4Haskell.org4NixOS Foundation4Typelevel4D Language Foundation3Kornia3Swift3Boa2GRAME2Kotlin Foundation2MoganLab2The JPF team2libssh1The Linux Foundation19The FreeBSD Project11openSUSE Project8RTEMS Project8Debian7GNOME Foundation6GNU Project5The NetBSD Foundation5CRIU4LabLua4Unikraft4EROFS filesystem3Haiku3KolibriOS Project Team3OpenAFS3Qubes OS3Apache Software Foundation34JBoss Community8Wikimedia Foundation8FOSSology7Drupal Association6Data for the Common Good5Django Software Foundation4Wagtail4Neutralinojs3SW3603webpack3Liquid Galaxy project11MariaDB8MetaBrainz Foundation Inc7PostgreSQL7CNCF5DBpedia5German Center for Open Source AI5JSON Schema5OpenStreetMap5Ceph Foundation3OWASP Foundation26The Honeynet Project8FLARE4Rizin4Metasploit3The Libreswan Project3AboutCode2HumanAI15BRL-CAD8Jitsi5FFmpeg3Synfig2OpenVINO Toolkit18API Dash3MIT App Inventor3Gemini CLI2MoFA Org2Kubeflow9Meshery5QEMU4Konflux3The OpenROAD Initiative3Metaflow2KubeVirt1rocket.chat10GNU Mailman4Free and Open Source Silicon Foundation5JdeRobot5
View as table
Contributors per organization in GSoC 2026
OrganizationContributors in 2026Category
Apache Software Foundation34Web
Machine Learning for Science (ML4SCI)33Science and medicine
NumFOCUS27Science and medicine
CERN-HSF26Science and medicine
OWASP Foundation26Security
R project for statistical computing25Science and medicine
FOSSASIA24End user applications
INCF23Science and medicine
AOSSIE22End user applications
The Linux Foundation19Operating systems
OpenVINO Toolkit18Development tools
UC OSPO15Science and medicine
VideoLAN15End user applications
HumanAI15Media
C2SI14End user applications
Python Software Foundation13End user applications
The Mifos Initiative13End user applications
LLVM Compiler Infrastructure13Programming languages
The Rust Foundation13Programming languages
The Julia Language12Science and medicine
KDE Community12End user applications
International Catrobat Association12Programming languages
Zulip11End user applications
The FreeBSD Project11Operating systems
Liquid Galaxy project11Data
Sugar Labs10End user applications
rocket.chat10Social and communication
Kubeflow9Infrastructure and cloud
Alaska8Science and medicine
OpenMRS8Science and medicine
Blender Foundation8End user applications
Open Robotics8End user applications
openSUSE Project8Operating systems
RTEMS Project8Operating systems
JBoss Community8Web
Wikimedia Foundation8Web
MariaDB8Data
The Honeynet Project8Security
BRL-CAD8Media
CGAL Project7Science and medicine
Genome Assembly and Annotation7Science and medicine
IOOS7Science and medicine
National Resource for Network Biology (NRNB)7Science and medicine
Open Science Labs7Science and medicine
Open Technologies Alliance - GFOSS7Science and medicine
Oppia Foundation7End user applications
Debian7Operating systems
FOSSology7Web
MetaBrainz Foundation Inc7Data
PostgreSQL7Data
CircuitVerse.org6Science and medicine
CCExtractor Development6End user applications
OSGeo (Open Source Geospatial Foundation)6End user applications
checkstyle6Programming languages
Eclipse Foundation6Programming languages
MetaCall6Programming languages
Processing Foundation6Programming languages
GNOME Foundation6Operating systems
Drupal Association6Web
cBioPortal for Cancer Genomics5Science and medicine
DeepChem5Science and medicine
Invesalius5Science and medicine
Open Science Initiative for Perfusion Imaging5Science and medicine
OpenAstronomy5Science and medicine
stdlib5Science and medicine
SymPy5Science and medicine
The ns-3 Network Simulator Project5Science and medicine
FreeCAD5End user applications
Graphite5End user applications
Joplin5End user applications
OpenWISP5End user applications
Accord Project5Programming languages
Dart5Programming languages
GNU Compiler Collection (GCC)5Programming languages
Jenkins5Programming languages
Pharo Consortium5Programming languages
Ruby5Programming languages
The P4 Language Consortium5Programming languages
GNU Project5Operating systems
The NetBSD Foundation5Operating systems
Data for the Common Good5Web
CNCF5Data
DBpedia5Data
German Center for Open Source AI5Data
JSON Schema5Data
OpenStreetMap5Data
Jitsi5Media
Meshery5Infrastructure and cloud
Free and Open Source Silicon Foundation5Other
JdeRobot5Other
Cuneiform Digital Library Initiative (CDLI)4Science and medicine
GeomScale4Science and medicine
Global Alliance for Genomics and Health4Science and medicine
LibreHealth4Science and medicine
OpenELIS Global4Science and medicine
PEcAn Project4Science and medicine
SageMath4Science and medicine
Ste||ar group4Science and medicine
dora-rs4End user applications
GNU Image Manipulation Program4End user applications
Open Transit Software Foundation4End user applications
ScummVM4End user applications
United Nations Office of Information Communication Technology4End user applications
Uramaki LAB4End user applications
Fortran-lang4Programming languages
Git4Programming languages
Haskell.org4Programming languages
NixOS Foundation4Programming languages
Typelevel4Programming languages
CRIU4Operating systems
LabLua4Operating systems
Unikraft4Operating systems
Django Software Foundation4Web
Wagtail4Web
FLARE4Security
Rizin4Security
QEMU4Infrastructure and cloud
GNU Mailman4Social and communication
ArduPilot3Science and medicine
Gambit: The package for computation in game theory3Science and medicine
GNU Radio3Science and medicine
gprMax3Science and medicine
Internet Archive3Science and medicine
JabRef e.V.3Science and medicine
LibreCube Initiative3Science and medicine
MDAnalysis3Science and medicine
Neuroinformatics Unit3Science and medicine
Open Food Facts3Science and medicine
Open Genome Informatics3Science and medicine
OpenMS3Science and medicine
Project Mesa3Science and medicine
QC-Devs3Science and medicine
Stichting SU23Science and medicine
Joomla!3End user applications
Kiwix3End user applications
Learning Equality3End user applications
Learning Unlimited3End user applications
LibreOffice3End user applications
Mixxx3End user applications
omegaUp3End user applications
Submitty3End user applications
D Language Foundation3Programming languages
Kornia3Programming languages
Swift3Programming languages
EROFS filesystem3Operating systems
Haiku3Operating systems
KolibriOS Project Team3Operating systems
OpenAFS3Operating systems
Qubes OS3Operating systems
Neutralinojs3Web
SW3603Web
webpack3Web
Ceph Foundation3Data
Metasploit3Security
The Libreswan Project3Security
FFmpeg3Media
API Dash3Development tools
MIT App Inventor3Development tools
Konflux3Infrastructure and cloud
The OpenROAD Initiative3Infrastructure and cloud
52°North Spatial Information Research GmbH2Science and medicine
GNU Octave2Science and medicine
MalariaGEN2Science and medicine
MLLAM2Science and medicine
preCICE2Science and medicine
TARDIS RT Collaboration2Science and medicine
AnkiDroid2End user applications
Neovim2End user applications
Tiled2End user applications
Boa2Programming languages
GRAME2Programming languages
Kotlin Foundation2Programming languages
MoganLab2Programming languages
The JPF team2Programming languages
AboutCode2Security
Synfig2Media
Gemini CLI2Development tools
MoFA Org2Development tools
Metaflow2Infrastructure and cloud
Open HealthCare Network1Science and medicine
St. Jude Children's Research Hospital1Science and medicine
libssh1Programming languages
KubeVirt1Infrastructure and cloud

Each block is one organization, sized by its 2026 contributors and grouped by category. Select one to open its page.

Source: Google Summer of Code public archive, 2016–2026.

522 organizations in the archive, including

  • Python Software Foundation
  • The Linux Foundation
  • Apache Software Foundation
  • LibreOffice
  • NumFOCUS
  • The Julia Language
  • Git
Featured atGDG Cloud NagpurGSoC 2026 complete guide, live session

ONE PAGE PER ORGANIZATION

Everything you would check before applying.
On one page.

Each of the 522 organizations has a page built from its full record in the program, so you can judge fit in a minute instead of an evening.

  1. 1

    Capacity

    Contributors accepted in every cycle, set against the median organization.

  2. 2

    Track record

    Cycles taken part in, the current streak, and the years an organization sat out.

  3. 3

    Past work

    Every accepted project since 2016, with the contributor and mentors behind it.

  4. 4

    Where to talk

    Ideas list, contributor guide, chat and mailing list, linked from one place.

Open Blender Foundation's page

Blender Foundation

End user applications
In GSoC 2026
1

8contributors in 2026

72projects since 2016

6.5a cycle on average

View as table
Blender Foundation contributors per cycle
Blender FoundationMedian organization
201684
201754
201853
201974
202094
202184
202233
202354
202464
202585
202684
2

11 of 11 cycles · 11-cycle streak

3

  • OpenTimelineIO Support in VSE

    Bipin_

  • Compositor: New Nodes from Geometry Nodes

    Criss-Ivana
4
Ideas listContributor guideChatForum

GSOC 2026 IN NUMBERS

Most organizations take three to five contributors.
Nine took more than twenty.

Capacity is the clearest signal in the archive. It shows how many people an organization can mentor in a summer, which is worth knowing before you put weeks into one.

Organizations

183

185 announced, 2 withdrew

Contributors

1,140

1,276 in 2025

Median per organization

4

Average 6.2

First-time organizations

17

14 in 2025

Back from 2025

79%

of 183 organizations

Most contributors in 2026

The ten largest took 23% of all slots

All
  1. Apache Software Foundation34new
  2. Machine Learning for Science (ML4SCI)33+2
  3. NumFOCUS27−5
  4. CERN-HSF26same
  5. OWASP Foundation26+11
  6. R project for statistical computing25+1
  7. FOSSASIA24+4
  8. INCF23−4
  9. AOSSIE22+1
  10. The Linux Foundation19−2
View as table
Organizations with the most contributors in 2026
Organization20262025
Apache Software Foundation340
Machine Learning for Science (ML4SCI)3331
NumFOCUS2732
CERN-HSF2626
OWASP Foundation2615
R project for statistical computing2524
FOSSASIA2420
INCF2327
AOSSIE2221
The Linux Foundation1921

Contributors per organization

How many each of the 183 organizations took in 2026

Three to five
  1. 41
  2. 192
  3. 1013–5
  4. 346–10
  5. 1611–20
  6. 921+
View as table
Organizations by contributors in 2026
Contributors in 2026Organizations
14
219
3–5101
6–1034
11–2016
21+9

101 organizations took three to five contributors. Larger ones usually run several sub-projects or umbrella teams.

START WITH A SHORTLIST

Six ready-made lists.
Each one defined by the record.

Open any list in the directory, then narrow it by your languages and interests.

40Every cycle since 2016Selected in all eleven cycles, 2016 to 2026.Open 17First time in 2026New to the program in 2026.Open 27Ten or more contributorsTook at least ten contributors in 2026.Open 13Growing in 2026More contributors than in 2025, and at least 25% above their 2021–2025 average.Open 22Back after a breakIn 2026 after sitting out 2025.Open 122Python organizationsList Python in their stack. They took 793 of this year's slots.Open

THE GSOC YEAR

It's October.
A good time to start contributing.

Google publishes exact dates each year. These months follow recent cycles: organizations are announced in late February and proposals open in March.

PhaseOctNovDecJanFebMarAprMayJunJulAugSep
Explore and contributePick organizations, read their code, land small fixesOctober to January
Organizations applyGoogle reviews mentoring organizationsJanuary to February
ProposalsOrganizations announced late February; applications open in MarchMarch to April
Results and bondingAccepted contributors announced, then community bondingMay to May
CodingStandard projects end in late summer; extended ones run longerJune to August
  1. 01

    Shortlist three

    Pick organizations that use a language you already write. Depth beats breadth.

    Browse by technology
  2. 02

    Join the conversation

    Read their ideas list and say hello in their chat before you ask for help.

    Organizations with a long record
  3. 03

    Land a first fix

    A merged pull request gives mentors something concrete to read next to your proposal.

    New in 2026

FROM THE BLOG

Guides for choosing and applying.

All articles

QUESTIONS

Straight answers
from the archive.

12,180 accepted projects across 11 cycles.

How many organizations are in GSoC 2026?

183 organizations took 1,140 contributors in 2026. Google announced 185; 2 withdrew before the program started.

How many contributors does a typical organization take?

The median organization took 4 in 2026. 101 of 183 took three to five, and 9 took more than twenty. The ten largest took 23% of all slots.

Which organizations take the most contributors?

Apache Software Foundation (34), Machine Learning for Science (ML4SCI) (33), NumFOCUS (27) took the most in 2026. Sort the directory by contributors to see the rest.

Which organizations have taken part every year?

40 organizations have been selected in all eleven cycles from 2016 to 2026, including Blender Foundation, KDE Community and the Python Software Foundation.

Does a long record mean an organization will be selected again?

No. Google selects organizations every year, and a strong record is not a guarantee. Treat participation history as context, and check the official list when it is published.

Where does the data come from?

Google's public Google Summer of Code archive, 2016 to 2026. Contributor counts are accepted projects. Mentor counts are published after each cycle ends, so 2026 has none yet. This guide is independent and not affiliated with Google.

START HERE

Find the organization
you will build with this summer.

183 organizations in 2026, 522 since 2016. Filter by stack, capacity and record, then shortlist the few that fit.

Browse 183 organizations Every organization since 2016