I'm looking to get feedback on my initial landing page…

I am currently looking for a solution to this problem (and many others here in IH), so I hope I can give you some hints.

1. this is a great idea. Such a great idea that I wonder why there isn't more competition. I have tested PUBilling and Servicebot. There is also Stripe Elements which is just checkout. So... kudos for you.

2. The aesthetics of the site is good. No need to improve there IMHO.

3. The name of the product does not help me understand it at all. It seems that is just authentication and in the first glance made me think that you were competing with Auth0, which I hope you are not.

4. Copy. Oh boy, you need some help here. I think you correctly identified a problem that saas developers have: you may spend as many hours developing user management, billing and checkout code that adds nothing to your saas value as the hours you will spend developing your product. This is insane. But I didn't get that from your landing. I think the cards with the features are better then the hero and actually explain the offer, but... I didn't feel like you could deliver that. Are you competing with auth0 and stripe?

If you want, we can schedule a call and talk more about it.

Very nice landing page. And it works - I signed up :)

I would like some more information on how the users of my app/service would use your service - do they create their account on your website, can they use the same account with you for multiple applications/subscriptions?

Nice site. very hard niche.
Maybe add description on who you are (or the group if exist) - to convey confidence.