Chatup is an extremely simple, easy to use backup service for twitch messages.
nodejs
npm
git clone https://github.com/devhsoj/chatup.git
cd chatup/
npm i
Single Channel
node index.js xqcow
Multiple Channels
node index.js xqcow sodapoppin
Backups are stored in a backups/ folder under where you installed chatup in the format of {timestamp}.db
They are written as a sqlite3 database.