For more than 25 years, the Open Source Initiative (OSI) website has been a central reference point for Open Source licenses. Over that time, our site has evolved through multiple redesigns, content management systems, and infrastructure migrations. As a result, license pages accumulated a variety of URL formats, including some ending in html, php, and txt.
In 2025 alone, our most-referenced license pages received significant traffic:
MIT: over 1.5M pageviews
Apache 2.0: 344K pageviews
BSD 3-Clause: 214K pageviews
