OP here. I started TestElf over a year ago. Our initial service was pay-per-use iOS testing and we launched the MVP here on HN. After working with hundreds of developers, we realized that there were still many aspects of manual testing that our initial service did not solve. Today, we are launching our first new service: pay-per-month dedicated testing aimed at larger development teams. Being a solo founder and bootstrapping since the beginning has definitely been tough. I wouldn't have gotten this far without our first trial users (many of them HN readers). Thanks everyone!