THEORIA. An International Journal for Theory, History and Foundations of Science is a non-profit editorial venture. It is a diamond open-access journal accepting original papers in any area of analytic philosophy (including, but not limited to, history and philosophy of science, philosophy of language, philosophy of mind, metaphysics, philosophy of logic, epistemology, or political philosophy). 

It is published by the University of the Basque Country (EHU Press) under a Creative Commons Licence. It is part of the Open Journal System (OJS) and all its papers (from 2003 onwards) are freely available on-line. Mirrors: Phil-Sci Archive, JSTOR, Dialnet, Redib. THEORIA. An International Journal for Theory, History and Foundations of Science has signed the San Francisco Declaration on Research Assessment (DORA). 

Established in 1952 by Miguel Sánchez-Mazas, THEORIA. An International Journal for Theory, History and Foundations of Science, it is regularly indexed in the following databases: Arts & Humanities Citation Index®, ISI Alerting Services, SCOPUS, Scimago, Current Contents®/Arts & Humanities, DOAJ, Bulletin Signaletique 519, ICYT, ISOC, MathSci,Mathematical Reviews, Current Mathematical Publications, Philosopher's Index, Philpapers, Repertoire bibliographique de la Philosophie. It also features prominently in national databases such as DICE and MIAR, and is indexed in the Diamond Discovery Hub.