OptinMonster is a web marketing tool that works in any CMS and not just WordPress. Armed with so-called Smart Controls such as Content Locking (requires an email address before unlocking more content) and Exit-Intent (targeted campaign at the precise moment when visitors are about to leave website/online store), this software should help increase subscriber base and complement email marketing campaigns.
Billed annually, right now Basic plan starting at 14 USD monthly. Pro priced at 39 USD monthly allows hosting of 5 sites and Growth Plan 69 USD monthly allows hosting of 10 sites and so suitable for owners holding multiple websites or web developers serving their clients. Take a look at all the four plans (Basic, Plus, Pro, Growth) and features under each plan here: OptinMonster will be the best money you’ve ever spent to convert and monetize your website traffic. The pricing may not be cheap for all. However, marketing is all about taking a decision if the returns generated from investment are worth the amount invested and should not be a deterrent for savvy business houses with a team of content creators and internet marketing experts to leverage the full potential of this intuitive plugin.
For publishers, Content Locking feature (not available with Basic Plan) of this software plugin should help make the best of articles and other contents generated by leveraging the psychology that once we start reading/viewing a content, there is an utter desire to complete the process. So, if a reader/viewer is asked to enter email id before completing the process of reading/viewing initiated, the chances are that he or she will enter email id, thereby increasing the subscriber base of the publisher. This should not be taken as unfair as publishers incur a significant cost generating contents and need to make up for their costs by other endeavors (of course ethical).
There is no free starter plan. There is no free trial. However, OptinMonster is offering a 14 day refund period in which you can cancel and receive a full refund if not satisfied with the plugin. OptinMonster is also offering monthly subscriptions if you do not wish to commit to a full year at first.