draw.io
IcePanel
Excalidraw
Kroki
Graphviz
flowchart.fun
Terrastruct
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.

The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Which is more popular?
Based on our record, Diagrams seems to be more popular. It has been mentioned 49 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | diagrams.mingrammer.com | diffyn.com |
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What each product offers, as listed by its team.

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An editorial look at what each product does well and who it suits.

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The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing Diagrams and Diffyn.
Diffyn's answer:
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
Diffyn's answer:
React, Next.js, POSTGRESQL
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
Diffyn's answer:
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
Share your experience with using Diagrams and Diffyn. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Since I often use Python, I decided to look into Diagrams ( https://diagrams.mingrammer.com) and was impressed by how easily the code was to understand. Started writing diagrams for my Terraform modules, and it worked well. - Source: dev.to / about 1 year ago
When I discovered Mermaid I was thrilled. I recently discovered "Diagrams" an alternative to Mermaid where you express your diagrams using Python code. - Source: dev.to / over 1 year ago
I'm working on a python library for Vizdom, to be released later this year, but in the mean time, you can use this python library which uses Graphviz under the hood. - https://diagrams.mingrammer.com/. - Source: Hacker News / about 2 years ago
Tracking Diffyn since Jun 2025.
When comparing Diagrams and Diffyn, you can also consider the following products.


Collaborative modelling and diagramming tool based on the C4 model. Software architecture design made fun! 🧊
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Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
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Creates diagrams from textual descriptions! It provides a unified API with support for BlockDiag, BPMN, Bytefield, C4 (with PlantUML), Ditaa, Erd, GraphViz, Mermaid, Nomnoml, PlantUML, SvgBob, UMLet, Vega, Vega-Lite, WaveDrom
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Graphviz is open source graph visualization software. It has several main graph layout programs.
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An open-source tool for generating flowcharts from text
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