Lightweight, privacy-first, open-source comment system

Cusdis is an open-source, lightweight (~5kb gzipped), privacy-first alternative to Disqus. It's super easy to use and integrate with your existing website. We don't track you and your users.



The JS SDK embedded to your website is only around 5kb (gzipped). It has built-in i18n, dark-mode.


Moderate all the comments on a dashboard.

Email Notification

You will receive Email notification when a new comment comes in, and approve the new comment without login.


You can set a Webhook URL that will be triggered when your websites have new comment. Integrate Cusdis with your favorite tools such as Telegram.

How to use Webhook

Approve/Reply without login

In the notification email and webhook, you will get a short-time link to approve/reply the new comment without login to dashboard. All the things get done in your mobile.

Import from Disqus

One-click to import your existed data in Disqus to Cusdis.

Open source

Cusdis is an open-source project. You can be sure that you and your users are not tracked. If you'd prefer to own your data, you can also self-host Cusdis easily.

Integrate with frameworks and platforms with ease




  • 3 Websites
  • Email Notification

$1 /month

Cusdis is totally free for now.

  • Unlimited Websites
  • Email Notification
  • Webhook
  • Spam filter (coming soon)

* We are not making money yet. Users sign up before we launch our paid plans will get three-months paid membership after the plans launch.

* If you like Cusdis. Consider sponsor us to help us be sustainable.

* Special thanks to these sponsors