News & Views: How Open Is “Open”? What OASPA’s License Data Reveals About the OA Market

"This month we look at the changing mix of licenses in use among OASPA members and what these trends reveal for open access publishing more broadly....

• CC BY (Creative Commons, attribution only) is by far the most prevalent form of license in use. It accounts for almost 75% of OASPA output and 46% of OpenAlex OA market output.
• CC BY-NC-ND (which adds non-commercial and non-derivative restrictions), accounts for approximately 15% of output in both cases.
• When non-OA content is included, “all rights reserved” unsurprisingly accounts for a substantial share—reflecting the fact that open access still represents only around half of total output in 2024, as noted in our Annual Market Sizing Update."