We're Retool (https://tryretool.com). We're not successful startup yet. But we're definitely a startup, haha.
We did a Show HN a year ago: (https://news.ycombinator.com/item?id=14515494). Then we did YC, raised a bit of money (almost entirely off our HN traction), and launched around a few weeks ago (https://news.ycombinator.com/item?id=17725966). Now we're profitable!