Online whiteboards

Online collaborative drawing, for, e.g. doing mathematics online or general diagrams. Many tools claim to do this, but I have not managed to have a truly satisfactory experience yet, although I have not much committed time to it. I was hoping for a slam-dunk best option. I suspect that most of the options are going to need some kind of stylus input to be any use, at least for the writing-heavy workflows I care about. So, something that involves a Wacom or an iPad or whatever.

Here are some candidates.


Mathcha - Online Math Editor is a hybrid option which aims to do mathematics online in particular.


An open source option that promises collaboration and end-to-end encryption is Excalidraw (source.)

Virtual whiteboard for sketching hand-drawn like diagrams. Collaborative and end-to-end encrypted.

There is a version is with extra work teams features called Excalidraw+ (USD7/person/month).


FigJam is made by Figma who have a very profitable business based on being pretty good at real-time collaboration, so maybe that is worth trying.

Miscellaneou online whiteboards

There are many others.

Interactive scratchpad Collusion (USD20/user/month), Bitpaper (approx USD1/page) is a collective sketch page. desmos is an online collaborative graphing calculator. Mural (USD20/user/month), …

There are other options which are offered only on assinine enterprise pricing (e.g. Blackboard Collaborate) which I will not trouble with here.

POint a camera at a physical whiteboard

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