Top 12 Open-Source Alternatives to Diagrams.net

Diagrams.net

Diagram Software and Flowchart Maker.

Not approved

Product categories

BPMN Design Collaboration Design Tools Diagrams Digital Whiteboard Drawing Flow Charts And Diagrams Flowcharts Prototyping UML UML Diagrams Wireframing

Summary

The top open-source alternatives to Diagrams.net are Excalidraw, Pencil Project, and asciiflow. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Excalidraw Landing Page
1

Excalidraw

Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
Pricing:
- Open Source
- Freemium
- $7.0 / Monthly
#Wireframing #Game Development #Mockups, Wireframing And Prototyping 250 social mentions
Pencil Project Landing Page
2

Pencil Project

Single-user mockup / wireframing / diagramming tool
Pricing:
- Open Source
#Wireframing #Diagrams #Flowcharts 11 social mentions
asciiflow Landing Page
3

asciiflow

Infinite ASCII diagrams, save to Google Drive, resize, freeform draw, and export straight to text/html.
Pricing:
- Open Source
#Wireframing #Diagrams #Flowcharts 36 social mentions
draw.io Landing Page
4

draw.io

Online diagramming application
Pricing:
- Open Source
#Wireframing #Diagrams #Flowcharts 716 social mentions
PlantUML Landing Page
5

PlantUML

PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Pricing:
- Open Source
#Diagrams #UML #Flow Charts And Diagrams 14 social mentions
Diagrams Landing Page
6

D

Diagrams

Diagrams lets you draw the cloud system architecture in Python code. It was born for prototyping a new system architecture without any design tools. You can also describe or visualize the existing system architecture as well.
Pricing:
- Open Source
#Software Development #Diagrams #Flow Charts And Diagrams 49 social mentions
nomnoml Landing Page
7

n

nomnoml

nomnoml is a free and open source tool to generate nice looking UML diagrams from simple text definitions.
Pricing:
- Open Source
#Prototyping #Diagrams #Flowcharts 7 social mentions
Wireflow Landing Page
8

Wireflow

Create beautiful flowcharts
Pricing:
- Open Source
#Wireframing #Design Collaboration #Prototyping 3 social mentions
OpenBoard Landing Page
9

OpenBoard

The OpenBoard software is an interactive white board software.
Pricing:
- Open Source
#Productivity #Team Collaboration #Work Collaboration
mockingbird Landing Page
10

mockingbird

Mockingbird helps you you create and share clickable wireframes. Use it to make mockups of your website or application in minutes.
Pricing:
- Open Source
#Wireframing #Design Collaboration #Prototyping
js-sequence-diagrams Landing Page
11

js-sequence-diagrams

js-sequence-diagrams turns text into UML sequence diagrams.
Pricing:
- Open Source
#Wireframing #Diagrams #Flowcharts 6 social mentions
GoJS Landing Page
12

GoJS

GoJS is a JavaScript library for building interactive diagrams on HTML web pages. Build apps with flowcharts, org charts, BPMN, UML, modeling, and other visual graph types.
Pricing:
- Open Source
#Flowcharts #UML #Org Charts 13 social mentions