Alternative - diagrams.net

Excalidraw

excalidraw.com

Miro

miro.com

Whimsical

whimsical.com

Lucid

lucid.co

Excalidraw+

excalidraw.com

Wondershare EdrawMax

edrawmax.com

Widget Board

widget-board.com

SmartDraw

smartdraw.com

Moqups

moqups.com

Creately

creately.com

ArcSite

arcsite.com

Boardmix

boardmix.com

Cloudcraft

cloudcraft.co

Sketch Web

sketch.com

Zen Flowchart

zenflowchart.com

Gliffy

gliffy.com

Cacoo

cacoo.com

ProcessOn

processon.com

Kumu

kumu.io

Qlerify

qlerify.com

FlowMapp

flowmapp.com

Querychart

querychart.io

Engage Process

engageprocess.com

Aha!

aha.io

VisualSitemaps

visualsitemaps.com

IcePanel

icepanel.io

Allo

allo.io

Zen UML

zenuml.com

StoriesOnBoard

storiesonboard.com

ERD Lab

erdlab.io