Isso

Isso is a commenting server for websites, similar in purpose to Disqus. It is self-hosted and stores comments in its own database.

Isso lets visitors post comments on your pages through a small script embedded in the site. Comments can be written in Markdown, and users can edit or delete their own comments within a time limit. New comments can wait in a moderation queue before they appear publicly. It can import comments from Disqus and WordPress exports, so you can move an existing discussion without losing it. The client script is small and works in the major browsers.

• Markdown comments
• Edit or delete own comments within a time limit
• Moderation queue before publishing
• Import from Disqus and WordPress
• Small embedded JavaScript file

Bloggers, documentation sites and small websites that want comments without a third party service. It suits people who are comfortable running a small Python service and adding a script tag to their pages.

Isso is open source under the MIT licence and free to use. Costs come from the server or container that runs it. Keep the database backed up, since it holds every comment. Moderation settings matter, because a comment queue only helps if someone checks it regularly. The project also welcomes translations and contributions.