The desire to be heard is a basic human characteristic. People want to influence others, to get attention and to develop conversations with those who share the same interests and passions. When applied to the internet, users like other people to read their opinions, ideas, critics, jokes and remarks, and they are more likely to return to a site that provides them with a simple opportunity to do so.
The majority of blogpost and articles published online has already acknowledged the value of having a comment section attached. Currently, most WordPress themes include a comment plugin by default; however, notifications of new comments are only sent to the author of the post.
Nowadays, commenting has taken another step forward thanks to the comment notification plugins for WordPress. Users may not only leave comments, but they can also get e-mail notifications when other users reply to their comments. When a visitor submits a respond to another user’s comment, an e-mail is sent to notify the original commenter. These comment notification plugins allow visitors to follow up comments and to promote conversations on your site. It is one of the most efficient and simplest ways to engage your users and develop long lasting relationships with them.
Free WordPress Comment Notification plugin
There are many free and easy to install comment notification plugins available online. Each plugin has its own nuances; so, make sure to check out the plugins’ features carefully, and choose the one that perfectly suits your specific needs.
Subscribe to Comments Reloaded
The plugin allows your users to register for e-mail notifications of following responses. It includes an advanced subscription manager that enables users to control notifications and lets you fully customize your messages.
Demo & download
Comment Reply Notification
This plugin allows commenters to choose whether they want to be notified of other users’ replies. In addition, it gives the post author an option to edit the subject of notification e-mail and message.

comment reply notification
Demo & download
Subscribe to Comments
Subscribe to comments is a WordPress plugin that includes a subscription manager that gives your visitors a full control over subsequent comment notifications. They may block certain posts; change their notification e-mail address etc.
Demo & downloadCbnet Multi Author Comment Notification
Multi author comment notification plugin sends a notice to multiple users according to your own settings. You may enable notification by the user role, send messages by a profile, define arbitrary e-mail addresses etc.
Demo & downloadMulti Author Comment Notification
Multi Author WordPress plugin enables you to get notifications for comments made at other author’s posts, as well as send notifications to registered or unregistered users.
Demo & download
Jetpack
Jetpack plugin has numerous features that allow you to manage many different aspects of your WordPress site. One of the great features being offered is a notification toolbar that grants you with a full control over comments made on your posts. Commenters may choose to get notifications for new posts or for follow-up comments by mail.
Demo & download
Commentify
Commentify displays Ajax notifications to users if the posts they are reading receive new comments. Commentify is a unique plugin; however, it costs $8.
Demo & download
Why dont you use one? I use Comment Notifier in one of my blog.
Hi Shemul,
Well, I do too; I’ve just received a notification regarding your comment…
No, I mean how could i subscribe to your reply?
Which one is the most light weight, I mean less load on page speed or something like that.
I want a simple system by which whenever I approve & reply the comment made on my Blog; the Commenter gets a notification in his email address.
And this too , I DO NOT want him to login (which he does not need to at present) or even select an option to subscribe to.