Welcome to the CWTS Leiden Ranking. We offer two editions of our ranking: the Traditional Edition and the Open Edition. Please choose which edition you'd like to use!

Leiden Ranking Traditional Edition

The Leiden Ranking Traditional Edition provides bibliometric indicators based on the Web of Science database. The 2025 release includes over 1500 universities worldwide. The Traditional Edition is based on over two decades of experience of our center in compiling university-level bibliometric analytics.

Leiden Ranking Open Edition

The Leiden Ranking Open Edition, launched in 2024, provides bibliometric indicators based on the OpenAlex database. The 2025 release includes over 2800 universities worldwide. Unlike the Traditional Edition, the Open Edition is based on open data, offering fully transparent analytics and supporting a more inclusive perspective on the global university landscape.