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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, DeepHN seems to be more popular. It has been mentioned 8 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | deephn.org | 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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Overall verdict
Why this product is good
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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 DeepHN 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 DeepHN and Diffyn. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Seems to buggy. According to the SeekStorm github, it's supposed to support boolean operators right? But they don't seem to work. Eg: https://deephn.org/?q=Linux+OR+KDE. - Source: Hacker News / almost 2 years ago
Counter-example: https://deephn.org/?q=embeddings. - Source: Hacker News / almost 2 years ago
Hey. Using https://deephn.org/ I saw that in 2011 you bought an enormous amount of bitcoin and you probably are a billionaire if you did hold that much until today. - Source: Hacker News / over 5 years ago
Tracking Diffyn since Jun 2025.
When comparing DeepHN and Diffyn, you can also consider the following products.

Making it easier to discover datasets. Made by Google.
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A marketplace to find and publish open data sets.
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Find, buy, and activate the exact data you need instantly.
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Datastore, dashboard and API for London's data
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Gigadata makes large datasets like total stock market prices, crypto, news, financials, reddit posts, government stats, the weather available via a simple API.
Compare Gigadata to DeepHN or Diffyn: