[kevinye93]

Beta websites are amazing. when we entered our closed beta for Tack; http://tack.tech (We combine task management and chat in one platform to make it easier to collaborate, think slack + asana + trello.) We submitted our platform to Betalist and Betapage. We were able to get over 100 teams signed up for our platform within a week and had a few users sign up every week after the "beta launch" (which is pretty good considering we're b2b). The best part is, both betalist and beta page are completely free of charge.

Take advantage of every free promotion/producthunt like service you can (although I would not suggest going on product hunt for your beta).

Other than that cold e-mailing, cold calling, and guest blogs also work really well in the beginning.