Open source. Open conversations.

Comments for
your website.
Your conversation.

Commentsy is an open source, embeddable comment system for websites and blogs. Add threaded discussions in minutes, customize the theme, and manage comments from one dashboard.

No external dependencies Make it your own
Commentsy comment interface in dark mode
A little space for big conversations
Commentsy discussion with nested replies from readers
Good things start with a comment.

A place for conversation, wherever you create.

BlogsPersonal sitesPhotosEcommerceServices
SMALL ADDITION. MORE CONNECTION.

Built for the conversation.
Designed to feel like you.

A simple experience for your readers. A thoughtful workspace for you.

01 / MAKE IT YOURS

Your site. Your style.

Customize colors for light and dark mode, and preview your changes before saving. Your comments should feel right at home.

A little more you.Appearance editor showing custom comment colors and a live light mode preview
02 / STAY IN THE LOOP

Comment moderation in one place.

Review comments and replies across your sites. Require approval for guest posts, approve pending comments, and mark unwanted posts as spam from your Commentsy dashboard.

Everything in its place.Commentsy dashboard with personal comment activity and connected sites
03 / KEEP THE THREAD GOING

Your contributions,
within reach.

Find your comments and replies across sites using Commentsy. Jump back into a discussion, or edit what you've shared.

Find your next conversation
Pick up where you left off.Personal comment history showing replies, GIFs, and links to the original discussions
LESS SETUP. MORE CONVERSATION.

A few minutes. Two snippets.
You're ready to go.

Read the documentation

Create an account, add your site, and use its app code in the snippets below. No external dependencies required.

1

Make room for the conversation

Place this HTML where you want comments to appear.

<!-- 
  Replace {{IDENTIFIER}} with your page's unique identifier variable
  The identifier you pass will be used to create a comments group
  For e.g. https://commentsy.vercel.app/{{YOUR_APP_CODE}}?identifier=my-new-blog-post
  -->
<iframe
  scrolling="no"
  frameborder="0"
  id="commentsyIframe"
  src="https://commentsy.vercel.app/embed/{{YOUR_APP_CODE}}?identifier={{IDENTIFIER}}&theme=light"
  style="width:100%;border:none;overflow:hidden"
/>
2

Add the finishing touch

Paste this JavaScript inside your HTML head tag.

<script>
  /**
   * Important!!! Do not modify this code
   * Paste this JavaScript code snippet as it is inside your HTML <head> tag
   * or
   * Paste it into an external JavaScript file then include it inside your HTML <head> tag
   **/
  window.addEventListener("message", (event) => {
    const iframe = document.getElementById("commentsyIframe");
    if (iframe && event.source === iframe.contentWindow && event.origin === "https://commentsy.vercel.app" && event.data) {
      if (event.data.type === "commentsyResize" && Number.isFinite(event.data.height) && event.data.height > 0 && event.data.height <= 100000) {
        iframe.style.height = `${event.data.height}px`;
      }
      if (event.data.type === "pingCommentsyParent") {
        iframe.contentWindow.postMessage(
          {
            type: "commentsyParentSiteData",
            title: document.title,
            url: window.location.href,
          },
          "https://commentsy.vercel.app"
        );
      }
    }
  });
</script>
A FEW THINGS TO KNOW

Small setup.
Good questions.

Everything you need to get the conversation started.

Explore the docs
How do I add comments to my website?

Create an account, register your site, and copy the iframe and JavaScript snippets into your pages. A stable identifier gives each page its own discussion. Follow the integration guide.

Will it work with my static blog?

Yes. Commentsy works on blogs, static HTML sites, and other websites that allow an iframe and JavaScript. Your site does not need its own comment backend.

Do my visitors need an account?

No. Visitors can post as guests or sign in. Turn on guest approval to review guest comments and replies before they appear publicly.

Can I self-host Commentsy?

Yes. Commentsy is open source. Get the code and setup instructions on GitHub to run your own instance, with custom light and dark themes.

LET'S TALK.

Give your next visitor a voice.

Bring the conversation to your corner of the internet.

Get started with Commentsy