Just going to go out on a limb and say the IP is owned by an investor. Paying 12 people isn't cheap, so that's why I assume there was an investor involved.

Yes, all of the above. It's quite simply not mine to open source.

If it was mine, people dramatically underestimate the effort and cost of supporting the OSS release of something like this.

It was also written on what I'm guessing was Rails 3.2 (circa 2011). There was no Docker, no Kubernetes; it was a monolith with many moving parts.

I also don't have access to the source code anymore, not easily.

It's also true that the company that we started continues to exist with a new product, and I suspect that some of our original code lives on.

It's just super messy.

Thanks for elaborating