Congratulations to the recipients of the 2025 Spotify FOSS Fund

Spotify announces the three recipients of its 2025 FOSS Fund, providing financial support to open source projects critical to its technology stack.

• •FFmpeg received €30,000; it is a 25-year-old multimedia processing tool used by YouTube, Netflix, and Spotify, maintained almost entirely by volunteers
• •Mock Service Worker (MSW) received €15,000; it is a JavaScript API mocking library maintained by a single developer and used across Spotify's web stack for unit testing
• •Xiph.Org Foundation received €25,000; it stewards audio codecs (Ogg, Opus, Vorbis, FLAC) fundamental to Spotify's audio delivery since its earliest days
• •MSW introduced major 2025 improvements including a new Interceptors architecture at the node:net level and first-class Server-Sent Events support
• •The fund reflects Spotify's participation in the Open Source Pledge, emphasizing repeatable financial contributions as a model for sustainable open source support