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PROGRAM YEARS

Eleven cycles of Google Summer of Code

Every cycle from 2016 to 2026 has its own page: the organizations, the first-timers, the technologies, and every accepted project with its contributor and mentors.

Cycles

11

2016 to 2026

Organizations

521

Took part at least once

Contributors

12,180

Accepted projects since 2016

Busiest cycle

2025

1,276 contributors

New in 2026

17

Organizations; 14 in 2025

Organizations

183 in 2026, 185 in 2025

View as table
Organizations per cycle
Organizations
2016178
2017201
2018212
2019206
2020199
2021202
2022202
2023168
2024195
2025185
2026183

Contributors

1,140 in 2026, 1,276 in 2025

View as table
Contributors per cycle
Contributors
20161,032
20171,127
20181,071
20191,134
20201,107
20211,204
20221,054
2023908
20241,127
20251,276
20261,140

Mentors

1,663 in 2025; 2026 not published yet

  1. n/a
View as table
Mentors per cycle
Mentors
20161,396
20171,579
20181,648
20191,754
20201,848
20211,783
20221,529
20231,414
20241,592
20251,663
2026n/a
  1. GSoC2026

    Current cycle
    Organizations
    183
    Contributors
    1,140
    First-time orgs
    17
    Mentors
    –

    Median 4 per organization

  2. GSoC2025

    21st edition
    Organizations
    185
    Contributors
    1,276
    First-time orgs
    14
    Mentors
    1,663

    Median 5 per organization

  3. GSoC2024

    20th edition
    Organizations
    195
    Contributors
    1,127
    First-time orgs
    34
    Mentors
    1,592

    Median 4 per organization

  4. GSoC2023

    19th edition
    Organizations
    168
    Contributors
    908
    First-time orgs
    19
    Mentors
    1,414

    Median 4 per organization

  5. GSoC2022

    18th edition
    Organizations
    202
    Contributors
    1,054
    First-time orgs
    34
    Mentors
    1,529

    Median 3 per organization

  6. GSoC2021

    17th edition
    Organizations
    202
    Contributors
    1,204
    First-time orgs
    41
    Mentors
    1,783

    Median 4 per organization

  7. GSoC2020

    16th edition
    Organizations
    199
    Contributors
    1,107
    First-time orgs
    33
    Mentors
    1,848

    Median 4 per organization

  8. GSoC2019

    15th edition
    Organizations
    206
    Contributors
    1,134
    First-time orgs
    31
    Mentors
    1,754

    Median 4 per organization

  9. GSoC2018

    14th edition
    Organizations
    212
    Contributors
    1,071
    First-time orgs
    49
    Mentors
    1,648

    Median 3 per organization

  10. GSoC2017

    13th edition
    Organizations
    201
    Contributors
    1,127
    First-time orgs
    71
    Mentors
    1,579

    Median 4 per organization

  11. GSoC2016

    12th edition
    Organizations
    178
    Contributors
    1,032
    First-time orgs
    –
    Mentors
    1,396

    Median 4 per organization

Data: Google Summer of Code public archive. Contributor counts are accepted projects. Participation history is not a prediction of selection. Mentor totals for 2026 are published after the cycle.