Run by Google
Google Summer of Code
Google's yearly program that pays new contributors to work on an open-source project over the summer.
2026
183organizations accepted
20162026
- 524
- organizations
- 12,244
- projects
- 183
- accepted in 2026
- 14
- new in 2026
Open-source mentorships, indexed
find your placein open source.
626 organizations and 13,197 projects from Google Summer of Code and LFX Mentorship, since 2016.
great work begins
in the open.
Every project here was proposed in public, mentored in public and merged in public. OSSGrid keeps 626 organizations and 13,197 projects since 2016 in one place, so you can see who keeps coming back, what they built and where you could start.
two programs, indexed in full.
Every organization and project from Google Summer of Code and LFX Mentorship, read from the official archives. Scroll through each one to see how it grew.
dashboards on the way.
The facts for these programs are checked and sourced. Their organization dashboards come next.
Suggest a program- OutreachyPaid, remote internships for people underrepresented in their country's tech industry.Two cohorts a year: May to August, December to March
- GirlScript Summer of CodeA three-month open-source program with a points leaderboard, run every year since 2018.Once a year, launching in March
- MLH FellowshipA remote 12-week internship alternative where small pods work on real open-source projects.See official site
- Summer of BitcoinA summer program that introduces university students to Bitcoin open-source development and design.See official site
explore organizations.
Search both indexes by name, language or topic. Every result opens a page with the organization’s years, projects and links.
Popular in GSoCPython 300JavaScript 246C++ 185C 148Java 123Web development 103Machine learning 82Databases 76
- 180GSoC organizations have taken part five or more yearsSee them
- 14organizations joined GSoC for the first time in 2026See them
- 326public GSoC proposals from 122 organizations, ready to read before you write yoursSee them
organizations that keep coming back.
A steady organization has mentors who know the program and maintainers who review quickly. Each square is one year. A lit square means the organization took part that year.
Google Summer of Code
Science and medicineNumFOCUS
Accepted every year from 2016 to 2026.
NumFOCUS promotes open source scientific software.
- Numba Optimized Implementations for scikit bio Performance Critical Functions2026
- Lumen + Xarray Integration2026
- Serialization Of Map and Model Classes into ASDF format2026
303 projects across 11 years
LFX Mentorship
Infrastructure & CloudKubeEdge
16 LFX terms since 2020.
60 projects across 7 years
Google Summer of Code
End user applicationsPython Software Foundation
11 years in GSoC.
289 projects across 11 years
Google Summer of Code
DataGerman Center for Open Source AI
New in 2026.
5 projects across 1 year
linked by the tools they share.
Each sphere is one of the 56 largest of 626 organizations, sized by the projects it has run. A line joins two organizations that list four or more of the same technologies. If you can work in one, you can read the code of its neighbours.
Google Summer of CodeLFX MentorshipFour or more shared technologiesArrow keys move between organizations. Enter opens one.Swipe sideways to see the whole network. Tap a sphere for details.
how people actually get selected.
Not a lottery. Three stages, in order, based on what mentors say they look for.
Choose your community
Join the chat before you touch code. Watch how fast maintainers review, whether past mentors still show up, and how many projects the organization has run.
- Shortlist two or three organizations whose stack you can already read
- Join their Slack, Discord or mailing list and read for a week
- Read the last 20 merged pull requests to see how review works
A steady organization beats a famous one. Its page here shows every year it took part.
Make meaningful contributions
Selection is mostly decided before applications open. Reproduce a real bug, fix it, test it and open a pull request. Then take the review seriously.
- Set the project up locally and run its tests
- Fix one real issue, not a typo, and explain how you tested it
- Answer every review comment within a day
Many strong organizations never label good first issues. Ask in chat which ones are wanted.
Prepare your proposal
Write a clear problem statement, a week-by-week plan with deliverables a mentor can check, and links to the work you already merged in their repository.
- One idea from the ideas list, agreed with a mentor
- Weekly milestones for 12 weeks (or up to 22)
- Your availability and timezone
Pick one idea from the org's ideas list and discuss it in their chat before you write. Proposals that arrive cold rarely get in.
common questions.
Short answers with a source on every fact. The official docs have the rest.
If you can give a summer and you are new to open source, start with Google Summer of Code: 18 or older; students or beginners to open source source. If you want a term at any time of year, LFX Mentorship runs three terms a year: spring, summer and fall source. Outreachy is for 18 or older; underrepresented in tech where you live source. Compare all of them in the programs chapter above.
Both pay a stipend for a term of mentored open-source work. LFX is run by The Linux Foundation, has three terms a year: spring, summer and fall source, and pays $1,000 to $6,600 source. GSoC is run by Google, happens once a year; apply in march, code may to august source, targets 18 or older; students or beginners to open source, and pays $750 to $6,600 depending on project size and country source.
- Google Summer of Code: 18 or older; students or beginners to open source. source
- LFX Mentorship: 18 or older; not a past Linux Foundation mentee. source
- Outreachy: 18 or older; underrepresented in tech where you live. source
- GirlScript Summer of Code: Open to everyone; free to apply. source
- MLH Fellowship: See official site. source
- Summer of Bitcoin: University students. source
On the proposals page, which indexes public archives of GSoC proposals and links to the original files. Read them for structure; never copy them.
Showing up in the project's chat weeks before the deadline and getting one or two real fixes merged. Mentors pick people they have already worked with.
No. OSSGrid is a community-built index. You apply on each program’s official site: Google Summer of Code, LFX Mentorship, Outreachy, GirlScript Summer of Code, MLH Fellowship and Summer of Bitcoin. 2 of them are indexed here today.
pick one organization.start tonight.
Read its last two years of projects, join its chat, and fix one real issue before applications open.
built in the open, too.
OSSGrid is itself open source. 5 people have shipped changes to it. That work is separate from the organizations listed here, which recognize contributions to their own projects.
