You can't have open-source software without it being free (as in freedom). The "Open Source definition"[0], according to the OSI, is essentially equivalent to

You can't have open-source software without it being free (as in freedom). The "Open Source definition"[0], according to the OSI, is essentially equivalent to the four freedoms of software (posited by the FSF). One might be able to find a pathological edge case that satisfies one and not the other, but in practice, they're literally the same thing (differing only in the motivating ideology). [0] http://opensource.org/osd http://opensource.org/osd