Product looks good, but I'm gonna roast you for having too little stuff on your landing page while also asking for a signup. I probably will sign up, I just have a reflexive aversion to doing so and generating yet another telemetry stream and set of incoming marketing emails.
The knowledge base and API documentation is good to me, but maybe not ideal for your target customer, the person looking for a no-code solution and probably somewhat intimidated by anything beyond a CSV. I think you should add a step-by-step or maybe a video showing how the HTML selectors and rules work in outline. When I first got interested in this topic there were two main stumbling blocks: cursors/pagination, and how to identify selectors on a page with multiple similar but distinct items (social media mutuals lists, product catalogs etc.). Since you're aiming at a non-technical audience, I think you need to give them feel of a walkthrough before downloading the app.