INTJ Forum was founded in 2007. It was originally intended to be a place for INTJs to meet other INTJs and for other types to get to know INTJs. Over the years, we developed a community that went beyond the MBTI. We've had thousands of members and millions of posts.
We went private in 2017 because hosting a large public forum was expensive and moderating problem accounts was time-consuming and not fun anymore. However, we're still an active community that gets new content daily. We still welcome new members, but keeping the forum private keeps registrations at a manageable level.
If you want to join our community without signing up for a forum you can't see first, I welcome you to join us in our public Discord chatroom.