remark42 - Remark42 is a self-hosted, lightweight commenting system

- Social login via Google, Twitter, Facebook, GitHub and Yandex - Login via email - Optional anonymous access - Multi-level nested comments with both tree and plain presentations - Markdown support with friendly formatter toolbar - Privacy-focused - Import from Disqus - Moderator can remove comments and block users - Voting, pinning and verification system - Sortable comments - Images upload with drag-and-drop and clipboard - List of recent comments from all posts - Export comments to json and automatic backups - RSS for all comments, each post and replies - Telegram and Slack notifications - No external databases, everything embedded in a single data file - Fully dockerized and can be deployed in a single command - Self-contained executable can be deployed directly to Linux, Windows and MacOS - Clean, lightweight and customizable UI with white and dark themes - Multi-site mode from a single instance - Integration with automatic SSL - Open source

doesn't spy on you, works fast and reliable, jetbrains uses it ;)