You are welcome to use VWO. I can help you set up a trial account with us, and I usually hang around on HN to answer any of your questions. We have a comparison page here: https://vwo.com/comparison/optimizely/
I was disappointed that YCombinator funded Optimizely given that they were expressly copying the idea of a small, single-founder who was sharing his business and experience on these boards. As an observer admittedly without knowledge of who made that funding decision and why, it still seems the most unethical thing YC has ever done.