These two products are built on different platforms. Startup is based on Bootstrap, which is good for developers familiar with it. Slides comes with its own framework architecture.
Slides is a great product for promo websites of any kind, where you can have animations between blocks and elements. The main purpose is to impress a visitor and bring attention to key features.
Startup, on the other hand, is perfect for start-up websites where there is a lot of information to show. It’s easier to build a multi-page website with blocks from Startup.
Startup has a built-in online editor that allows you to edit content without accessing the source code. Slides has a built-in source code editor, so you can customize any section directly in the Slides app.
Both come with handy generators, which can export ready-made templates. You can edit locally using the code editor on your computer and upload the result on your hosting using FTP or another other tool. You can either app for an unlimited number of pages, projects, and websites. There are no limitations on the number of exports for either tool.