Maybe consider including a table highlighting the differences in features/pricing from other similar tools on the homepage (after the list of features) or a separate page entirely highlighting this information? For example, Render.com has a page specifically highlighting how their product is a better PaaS solution compared to Heroku [0]. This is just a thought.
Personally, I'm not familiar enough with DB design editors to know what I should be looking for in such a tool. Moreover, about ~1 year ago, I was looking for a solution that solved this exact problem, so I am genuinely curious about this.
Finally, just wanted to mention that while I don't need this at the moment, I did bookmark it to consider using in the future.
Otherwise, great job, and I wish you the best!