Spotify’s First FOSS Fund: The Eight Recipients
Spotify has announced the winners of its inaugural FOSS Fund, an initiative designed to provide direct financial backing to independent open source projects that the company’s engineering teams rely on. The fund was established to help ensure these projects have the resources to continue maintenance and development.
The selection process began with 59 project nominations submitted by Spotify’s internal R&D community, which were then cross-referenced with the company’s list of 2,454 internal dependencies. The FOSS Fund committee narrowed this pool to 18 eligible candidates before settling on the final eight recipients, who will share a total budget of 100,000 EUR.
According to the committee, the selections were based on supporting independent projects most meaningful to Spotify’s work. The recipients are:
Here is the full breakdown of the winners and their allocations:
Byte Buddy — 13,000 EUR. A code generation and manipulation library for creating and modifying Java classes at runtime, without a compiler. Spotify reports thousands of references to the project, and its maintainer works on it full-time.
MUI — 13,000 EUR. Material UI is an open source React framework that serves as the foundation of the UI in Backstage, Spotify’s developer portal, which it open sourced in 2020.
protoc-jar — 3,000 EUR. Used on the data engineering side, this project helps Spotify work with protocol buffer messages in batch pipelines to store intermediate data on GCS. The amount is the maximum allowed by the project.
QOS.CH — 13,000 EUR. This donation supports a core developer on log4j 1.x, reload4j, slf4j, and logback, all critical logging libraries for Spotify and much of the wider internet.
Testcontainers — 13,000 EUR. A Java library for JUnit tests that provides lightweight, throwaway instances of common databases, Selenium web browsers, and anything else runnable in a Docker container. Thousands of applications at Spotify reference it.
urllib3 — 13,000 EUR. With over three billion annual downloads, urllib3 is one of the most popular Python packages and the fourth most-used Python library inside Spotify. The Python ecosystem relies on it for pip, Requests, and many other projects.
Xiph — 19,000 EUR (for multiple projects). The non-profit Xiph.org Foundation maintains audio codecs that are core to Spotify’s audio delivery. It received the highest number of nominations from Spotify engineers.
Yarn — 13,000 EUR. Yarn helps Spotify structure web projects, manage dependencies and scripts, and handle packaging and distribution. It is also part of the company’s Golden Path for website development.
Focus on the Maintainers
While the projects themselves are vital to Spotify’s engineering efforts, the company emphasizes that the real purpose of the fund is to support the people behind them. Spotify plans to publish a follow-up post featuring conversations with maintainers about what the funding will mean for their work.
