Bubble is a visual programming tool that lets you build, launch and run web apps without typing any code. The things you can build can be quite complex. A user did clone 90% of Twitter on Bubble. Marketplaces are very much what you can build on us. It does take time (we don't offer templates to keep flexibility); cloning Twitter took about 4 days, but it's still much faster to use than code. The learning curve is about 3 hours. And after this, we handle infrastructure, servers, etc! The vision is that you should only have to focus on your app's design and functionality, and we handle the lower level stuff.