Is there a public "company page" where investors can see my startup?

No, there is no such page.

Besides issues of privacy and confidentiality, this kind of public profile is actually a bad idea.

Investors like the "hunt". They like feeling that they had to struggle to access a deal. If your startup is visible on a public page for all to see, like meat on the shelf, it's not exciting for them and many will think poorly of you.

True, it's not efficient, but fundraising is a psychological game.

So no public profile for your startup is available on OpenVC.