Google Summer of Code

Google Summer of Code is a global program focused on bringing more student developers into open source software development. Students work on a three month programming project with an open source organization during their break from university.

Since its inception in 2005, the program has brought together over 17,000 student participants and over 35,000 mentors from 124 countries worldwide. Google Summer of Code has produced over 38 million lines of code for 715 open source organizations.



Students contact the open source organizations they want to work with and write up a project proposal for the summer. If accepted, students spend a month integrating with their organizations prior to the start of coding. Students then have three months to code while meeting the deadlines agreed upon with their mentors.


Open source projects apply to be mentor organizations. Once accepted, organizations discuss possible ideas with students and then decide on the proposals they wish to mentor for the summer. They provide mentors to help guide each student through the program.


Existing contributors with the organizations can choose to mentor a student project. Mentors and students work together to determine appropriate milestones and requirements for the summer. Mentor interaction is a vital part of the program.

GSoC 2021

In the 2021 program, 1203 projects were completed with 202 open source organizations.

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GSoC 2020

In the 2020 program, 1198 projects were completed with 199 open source organizations.

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GSoC 2019

In the 2019 program, 1134 projects were completed with 206 open source organizations.

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GSoC 2018

In the 2018 program, 1072 projects were completed with 206 open source organizations.

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GSoC 2017

In the 2017 program, 1127 projects were completed with 201 open source organizations.

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GSoC 2016

In the 2016 program, 1032 projects were completed with 178 open source organizations.

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Previous Years

Interested in projects from before 2016?

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