Opt-in email is a term used when someone is given the option to receive email.
Typically, this is some sort of mailing list, newsletter, or advertising.
Without obtaining permission before sending email, the email is unsolicited bulk email, better known as spam.
Landing Page Monkey – So many different ways to use LandingPage Monkey to build your list and grow your business. You can build opt-in pages, affiliate promotion pages even quick and easy sales pages. You can build pre-webinar registration pages, prize draws or contest opt-ins, workshop registration pages and more. And all in just couple clicks.
OptinPressor – Optin Pressor enables you to build a premium quality list of active and verified subscribers who always check their email every day. It lets you leverage the Facebook, Google, and Yahoo’s apps Opt-in Technology.
TimeLine Optins Pro – Combining The Power of Video with the Viral Nature of Facebook and build a targeted cash generating email list without even needing a website or an advertising budget and only working about an hour a day.
UberOptin – Best Choice for Creating Gorgeous Opt-In Widgets. Includes customizable styles designed to convert more subscriber.
WPOptinBoxes (Unlimited Sites) – Collect Unlimited Leads from your WordPress Site. With beautiful opt-in boxes and revolutionary 2-Step Opt-In process. You can get started in under 60 seconds and no experience needed. No monthly fees, no restrictions & no limitations. If you’re not building your list, you’re missing out on huge paydays.