Introducing Kucos

Simple and privacy focused comments with kudos.

You don't need a server to host your comment system, you can easily host Kucos on ZEIT NOW (now Vercel) and database on Mongo Atlas where 500mb is for free (for comments it is a lot space :)).

Kucos is focused on complete user privacy and data security, that' s why commenting is completely anonymous, no account is needed.

Kucos is written entirely in JavaScript, backend in NodeJS with MongoDB (Mongoose) and frontend in pure JS.
Source of Kucos can be found on GitHub, I invite you to test the demo on this page, also I'm happy to see pull requests with your fixes or new features :)

A simple Markdown is also available, here you can check out the available Markdown.

Available functions: -(v0.10.0)

  • Writing new comments
  • Reply to comments
  • Fast quote comments (select text and click Reply)
  • Hidding/showing children comments
  • Voting on comments
  • Markdown text formatting
  • Adding Kudos under post


  • ✅ Edit own comments, within an hour -(v0.10.2)
  • ✅ Simple moderation of comments by the website owner -(v0.10.4)
  • ✅ Checking whether a comment is spam. (Akismet) -(v0.10.4)
  • ✅ Fast and lightweight code highlighting in comments -(v0.10.5)
  • Antiflood function
  • Internationalization (i18n)

Add Kucos to your website

To add Kucos to your website you only need to add two additional lines.

  • <div id="comments"></div>
  • <script src="http://localhost:3000/min/kucos.min.js"></script>