Quip is not available as a self-hosted solution but there are plenty of alternatives for power users and business that want to host a solution on-premise. The best Self-Hosted alternative is Standard Notes, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Quip and 19 are available as a self-hosted solution so hopefully you can find a suitable replacement. Other interesting Self-Hosted alternatives to Quip are ONLYOFFICE (Freemium, Open Source), Trilium Notes (Free, Open Source), Etherpad (Free, Open Source) and Confluence (Paid).
Etherpad is a highly customizable Open Source online editor providing collaborative editing in really real-time. Collaborating in really real-time No more sending your stuff back and forth via email, just set up a pad, share the link and start collaborating!
Foam is a personal knowledge management and sharing system inspired by Roam Research, built on Visual Studio Code and GitHub. You can use Foam for organising your research, keeping re-discoverable notes, writing long-form content and, optionally, publishing it to the web.