WhichToUse

Best Diagrams & Architecture AI tools

Apps and open-source skills for diagrams & architecture that we opened, read up on, and ranked — with the reasoning behind every pick.

APP / SAAS7
1E
Eraser (DiagramGPT)
HighFreemium (paid from ~$10/user/mo)
9.4
2M
Mermaid Chart
HighFreemium (paid from ~$8/mo)
9.1
3L
Lucidchart
HighFreemium (paid from ~$9/mo)
8.8
4W
Whimsical AI
MediumFreemium (paid from ~$10/mo)
7.3
5M
Miro AI
MediumFreemium (paid from ~$8/mo)
7.0
6N
Napkin AI
MediumFreemium
6.7
7I
InfraSketch
LowFreemium (paid, custom)
5.4
SKILL / REPO10
1M
Mermaid
HighFree / OSS
9.4
2E
Excalidraw
HighFree / OSS
9.1
3D
Diagrams (mingrammer)
HighFree / OSS
8.8
4D
D2
HighFree / OSS
8.5
5T
tldraw
HighFree / OSS
8.2
6P
PlantUML
MediumFree / OSS
7.3
7C
C4-PlantUML
MediumFree / OSS
7.0
8D
draw.io (drawio)
MediumFree / OSS
6.7
9M
Mermaid Diagrams (softaworks agent-toolkit)
MediumFree / OSS
6.4
10M
Mermaid Skill (Agents365-ai)
LowFree / OSS
5.4