Webflow is different. It doesn't limit to set of templates and their styling, which most other site builders do. It's a GUI layer above raw CSS and HTML, which gives you the ability to build virtually anything. It's an order of magnitude more powerful than its competitors. Webflow's own website[1] is a great example of what you can make with it.
Considering how many marketing departments I have seen struggling to pull someone from the dev team to fix a tiny, tiny change, this is a massive opportunity.
[1]: https://webflow.com/