Quip is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is Joplin, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Quip and many of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Quip are LibreOffice - Writer (Free, Open Source), Standard Notes (Freemium, Open Source), CherryTree (Free, Open Source) and ONLYOFFICE (Freemium, Open Source).
NixNote, formerly Nevernote, is an open source client for Evernote . It is written in Java so it will also run on Windows & OS-X, but the primary focus has been to try and get a usable environment for Linux.
TextMaker is a Microsoft Word-compatible word processor, part of SoftMaker FreeOffice. It's available for free included in the FreeOffice suite. It runs lean (using around 12MB of RAM on my system) and is surprisingly feature rich.
WizNote is a Note software, which is especially designed for Internet users and mobile Internet users. WizNote focuses more on notes of rapid collection, management, reading and sharing. WizNote is smaller, more stable, and more suitable for computers, phones and mobile devices.
An online word processor that lets you create and edit documents in your web browser and save them in the cloud, so that you can share them with anyone. Zoho can allow multiple users to work on a document simultaneously.