Comment by miroz

I had very similar experience. We built a custom workflow engine, with visual designer in a few weeks, which then went with our DMS custom solution. Any workflow engine we tested, before or after the build, was either too complex or too expensive. We had few bugs and newbie mistakes in ours, but nothing too bad. We sold few more installations quickly because we could implement any customer need promptly. It's now more than 10 years and I moved on, but the company is still selling the engine with other solutions. I would say, a big win for build vs buy.