I like the logo :- ) & the website seems easy to understand. The unique selling point, is that the links will only work for one's team, right?

I'm thinking someone can use Googles URL shortener instead, and share the resulting links within the team only — that'd give the same effect?

If the destination page is truly secret, then the company ought to have other access control features anyway I think.

I'd be worried that you go out of business soon and all links will break.

You can get more feedback here: https://usability.testing.exchange (it's a free & open source side project I'm doing). You can edit the question text and ask for feedback about the overall idea, and what other features people might want.

Book tips: http://www.startupwerkboek.nl/startupcenter/Momtest.pdf (the first parts are free & the most important ones). This book helps you find out, before you start writing code, if the underlying idea is something people want / need. (People, including I, sometimes do the mistake to start writing code, too early, before they know if the underlying idea is a good idea.)

Anyway I wish you good luck with this, and sometimes in the end everyting turns out to have been a good idea (even if the project didn't take off), just because of everything one learned, whilst doing it :- )