
Graphviz
Gephi
yEd
PlantUML
Mermaid
OmniGraffle
Excalidraw
Create beautiful diagrams just by typing notation in plain text.

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, Penrose seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | penrose.cs.cmu.edu | diffyn.com |
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What each product offers, as listed by its team.


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


No analysis of Penrose yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Audeze Penrose Review
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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 Penrose 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 Penrose and Diffyn. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Semi, aside, but I'm desperate for a better way to make math diagrams (WYSIWYG style, not TeX). I asked about this a while ago and nothing is really doing it for me: https://news.ycombinator.com/item?id=38351370 as well. Right now I use... - Source: Hacker News / over 1 year ago
Penrose is a platform that enables people to create beautiful diagrams just by typing notation in plain text. https://penrose.cs.cmu.edu/. - Source: Hacker News / over 2 years ago
- penrose - advanced, general - https://penrose.cs.cmu.edu. - Source: Hacker News / almost 3 years ago
Tracking Diffyn since Jun 2025.
When comparing Penrose and Diffyn, you can also consider the following products.

Graphviz is open source graph visualization software. It has several main graph layout programs.
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Gephi is an open-source software for visualizing and analyzing large networks graphs.
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yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
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PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
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Create diagrams and visualizations using text and code.
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OmniGraffle is for creating precise graphics like website wireframes, an electrical system designs, or mapping out software class.
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