Not a lawyer and what I'm going to say is vastly oversimplified, but the gist is: - A 501(c)(3) is for the benefit of the public - A 501(c)(6) is for the comm

Not a lawyer and what I'm going to say is vastly oversimplified, but the gist is: - A 501(c)(3) is for the benefit of the public - A 501(c)(6) is for the common interests of their members They both have advantages and disadvantages and are appropriate for certain scenarios. Examples are: - A 501(c)(3) Python, Scala, Zig, Mozilla, Apache, SFC, FSF - A 501(c)(6) .NET, Rust, Eclipse