Even as AI adoption accelerates and transforms the global technology landscape, open source remains foundational to how Alphabet builds, uses, and collaborates on products for billions of users. Our commitment to open source remains broad and consistent, including sharing our work year-over-year, and reflecting on what we've learned.
In 2025:
- Roughly 10% of Alphabet's full-time workforce actively contributed to open source projects. This contribution ratio has remained steady over the past five years, scaling to match our growth.
- These open source contributions are not just solely focused on Google. Our top projects by unique contributors at Alphabet include community-led projects such as LLVM, vLLM, Envoy, and Rust, as well as Google-initiated projects like Kubernetes, Apache Beam, and gRPC.
- In addition, Alphabet projects received commits from more than 20,000 non-Alphabet affiliated user accounts.
Working together on emerging standards
Open source communities continue to provide vital collaborative spaces to define emerging standards, ensuring the interoperability and extensibility for the next generation of technologies. In 2025, we worked with more than 50 partners on the Agent2Agent (A2A) protocol to enable AI agents to communicate with each other, securely exchange information, and coordinate actions on top of various enterprise platforms and applications. Within weeks of our initial announcement, Google donated the A2A project to the Linux Foundation as part of our long-standing commitment to develop "open, collaborative ecosystem – offering greater autonomy and multiplying productivity."
Launching tools with transparency
Open source licenses provide a framework for anyone to explore, test, fork and expand on our technologies. Over the last 15 years, Google has created more than 15,000 public repositories on GitHub. Today, Google continues to maintain more than 5,000 public repositories on GitHub, and more than 1,500 public repositories on Git-on-Borg. A quick look back to some highlights from our 2025 launches includes:
- Gemma 3 – a collection of lightweight open models built from the same research and technology that powers our Gemini 2.0 models. They are designed to run directly on devices — from phones and laptops to workstations — helping developers create AI applications, wherever people need them. Since Gemma’s release in 2024, the Gemmaverse community has created more than 60,000 Gemma variants. We’ve continued work on this collection and in 2026 we released Gemma 4 under an Apache 2.0 license.
- Agent Development Kit – an open-source framework and SDK designed to help developers build, compose, and run both conversational and non-conversational AI agents.
Adjusting our collective security practices
As the threat landscape evolves and accelerates in the AI era, we are working on novel solutions to mitigate vulnerabilities at scale and remove some of the burden from overloaded maintainers. In 2025, we introduced several critical security initiatives to support upstream open source projects:
- CodeMender: An agent designed to be both reactive, instantly patching new vulnerabilities, and proactive, rewriting and securing existing code and eliminating entire classes of vulnerabilities in the process. In its first six months, we were able to upstream 72 security fixes to open source projects, including some as large as 4.5 million lines of code.
- OSS Rebuild: A security initiative to prevent software supply chain attacks by verifying build provenance. It automates package rebuilding and semantically compares results to upstream artifacts to detect tampered code on registries like PyPI, npm, and Crates.io.
- OSV-Scalibr: (Software Composition Analysis Library) the core engine for vulnerability scanning used internally and in OSV-Scanner.
- Credential Scanning on deps.dev: A service (using Veles) that actively scans open-source packages on deps.dev for leaked GCP credentials to prevent account compromise.
Working together to sustain the contributor community
Beyond security contributions, we remain committed to providing financial support directly to projects and maintainers. In 2025, the Open Source Programs Office (OSPO) directed $2M in sponsorships and investments to more than 40 open source projects.
Google Summer of Code celebrated its 21st year of enabling open source organizations to find, mentor, and onboard new contributors, directly supporting 1,280 individuals to contribute to 185 organizations. Over its lifetime, the global program has connected more than 23,000 participants from 125 countries with over 1,000 open source organizations globally. Moving forward, we recognize the need to evolve our program structures to ensure they continue to effectively support maintainers in the AI era.
Evolving the way we work in open spaces
Respecting community norms and practices is fundamental to establishing and maintaining trust in open source communities. To ensure we remain supportive members of your community, we encourage projects to document preferred practices and policies in the wake of new technologies. As AI changes the way we work, we are continually evaluating how best to evolve the way we engage in open spaces to preserve, prepare and bolster the communities we depend on.
We are deeply grateful for the many individuals and organizations that have worked with us to create global technologies from which everyone can benefit. You can continue to learn more about our open source initiatives, ongoing programs, and new projects at opensource.google.
Appendix: About this data
This report features metrics provided by many teams and programs across Alphabet. In regards to the code and code-adjacent activities data, we wanted to share more details about the derivation of those metrics.
- Data sources: These data represent the activities of Alphabet employees on public repositories hosted on GitHub and our internal production Git service Git-on-Borg. These sources represent a subset of open source activity currently tracked by Google OSPO.
- Business and personal: Activity on GitHub reflects a mixture of Alphabet projects, third-party projects, experimental efforts, and personal projects. Our metrics report on all of the above unless otherwise specified.
- Alphabet contributors: Please note that unless additional detail is specified, activity counts attributed to Alphabet open source contributors will include our full-time employees as well as our extended Alphabet community (temps, vendors, contractors, and interns). In 2025, full time employees at Alphabet represented more than 95% of our open source contributors.
- GitHub Accounts: For counts of GitHub accounts not affiliated with Alphabet, we cannot assume that one account is equivalent to one person, as multiple accounts could be tied to one individual or bot account.
- Active counts: Where possible, we will show ‘active users’ defined by logged activity (excluding ‘WatchEvent’) within a specified timeframe (a month, year, etc.) and ‘active repositories’ and ‘active projects’ as those that have enough activity to meet our internal active-project criteria and have not been archived.