TSOSI: practicing open data to broaden financial support of open infrastructures

TSOSI, Transparency to sustain open science infrastructure, is a new web platform, launched in June 2025, that aims to broaden financial support to open science infrastructure. This contribution will first explain the context and goals of TSOSI. Its aim is to make support for infrastructures as evident as, for example, subscribing to a ‘publish and read’ agreement. How can we make the practice of supporting open infrastructures more common? This will be the main focus of the contribution.TSOSI’s original idea is based on transparency and mimicry. Imagine a tool, for universities, that allows them to see which open infrastructures their neighboring universities have supported. This is precisely what TOSI is designed to do. It highlights which organizations – e.g. research funders, library consortia, universities – have financially supported which open infrastructures. TSOSI sheds light on the open infrastructure funding landscape; its motto is ‘the more we highlight the supports made for open infrastructures, the more supporters we will attract’.