devenbhooshan

This plugin creates a top/bottom bar like http://www.chaaicoffee.com/ . Your visitors can subscribe to your posts by clicking ‘Send to Messenger’. Using the Dashboard – https://dashboard.mindiq.in you will be able to send Newsletters to your subscribers in their facebook messenger chat. Using the dashboard, you can see analytics like total subscribers, read rates etc to optimize the newsletters and the content.
The Newsletters sent are rich personalized cards. User can click the cards and then they are redirected to your WordPress website. Through MessengerChimp, brands can build, maintain subscribers list and send personalised content on-demand and at scale. For the end consumer, it is more a personalised recommendation directly delivered to his Facebook Messenger. New blog post updates can also pushed to their Facebook Messenger chat.
One of the most important metrics tracked in Email campaigns is “Open Rate”. The Industry average Open rate for Email lies around 25-30%. (Source: MailChimp) Messenger campaigns have seen a 90% Open Rate in 3 minutes or less (3X of Avg Email open rates)
You can read about it more at our blog post – https://blog.mindiq.in/introducing-messengerchimp-2-0-the-next-generation-marketing-b83cb0a28f54#.6fvs81m3i

MessengerChimp Bar

Increase your traffic, reach billions of Facebook Users.  Add MessengerChimp Facebook Bar to your WordPress site.

EverPress

Xaver

Mailster Newsletter Plugin

Integrates Mailster Newsletter Plugin with Gravity Forms to subscribe users with a Gravity Form. 
Requires the Mailster Newsletter plugin and the Gravity Forms plugin
<blockquote>
This Plugin requires <a href="https://mailster.co/?utm_campaign=wporg&utm_source=wordpress.org&utm_medium=readme&utm_term=Gravity+Forms" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a>
</blockquote>

Mailster Gravity Forms

Integrates Mailster Newsletter Plugin with Gravity Forms to subscribe users with a Gravity Form.

MessengerChimp Bar vs Mailster Gravity Forms