Prefinery helps you launch a private beta for your Web application in minutes.

Prefinery takes care of collecting e-mail addresses, generating unique invitation codes, and sending invitations for your private beta. You can even create custom invitation codes, valid for a specific number of uses or duration of time.

Via Prefinery’s Teaser Page feature you can create a fully customizable, one-page promotional website to attract potential customers and measure interest during, or even before, product development.

Of course, your data is yours and Prefinery offers a variety of ways to export tester contact information, including export to spreadsheet, XML, Highrise, MailChimp, and Campaign Monitor.