Ask HN: Where to post landing page to gauge interest in startup?

Hi HN!

I'm a first time founder who's set out on a mission to help eliminate false reviews from Amazon by building a social rating and review platform that connects consumers with trusted influencers. Fake reviews cost Americans 0.12 cents on every dollar they spend, which is 10 cents more than what NASA gets. I want to know if any of you more experienced founders know a place where I can submit a landing page for my startup, un order to gauge interest before I build the website/platform.