I come from a technical background and have little experience in marketing and internet space. I am currently working on my startup that is ready to launch within few weeks.

I am having difficulties to think about how I am going to launch it. I am thinking of doing a closed beta first and then after few weeks of beta, then open it up.

my question is how do I build my landing page? Should I use a free landing page like launchrock.co, prefinery.com, or build my own?

I think what I want on my landing page are a space for people to ask for an invite by entering their email address (hence I am mining email) and a login link for people who have credentials to login. I would then do manual work by sorting email address and manually send invite to the email addresses that are legit (not spam).

Would that be enough? Should I use free landing page tools like launchrock? Paid like prefinery? or build my own landing page as it's simple enough?

Thank you for your input