More seriously, I believe that SourceSafe was maintained on Microsoft's fork of Perforce, but I don't honestly know, nor do I have contacts at this point who'd be able to find out.
I would surmise that the original authors at One Tree did maintain it on itself, but it's a pity that it's nigh impossible to find any sources on this.
More seriously, I believe that SourceSafe was maintained on Microsoft's fork of Perforce, but I don't honestly know, nor do I have contacts at this point who'd be able to find out.