
Proxyman.io
Charles Proxy
mitmproxy
Surge for Mac
Fiddler
Weer
James
Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, Android, CLI tools, scripts and more.

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, HTTP Toolkit seems to be more popular. It has been mentioned 30 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | httptoolkit.com | diffyn.com |
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| Company | Startup from Spain · 1 - 9 employees | — |
| Listed in |
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
HTTP Toolkit Demo
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 HTTP Toolkit 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 HTTP Toolkit and Diffyn. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


HTTP ToolKit is an open-source tool for debugging. It works with the three main OS and has good features attached to it. Just with a click, it can intercept and view all your HTTP(s). Compared to others, it targets...
HTTP Toolkit supports standard HTTP debugger features including breakpoints & rewriting HTTP(S) traffic, filtering and searching collected traffic, and highlighting & autoformatting for many popular request & response...
For debugging, testing, and building APIs with HTTPs, you can effectively use HTTP Toolkit because it is built for this purpose. Also, this is the reason why it is known as a good Postman alternative for various...
We have no reviews of Diffyn yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


I can add certificates on my unrooted android. That how HTTPToolkit [0] works, it only requires adb, which (thankfully) doesn't trip banking apps. Banking apps can (and do iirc) pin certificates, so a rooted phone adds no risk... - Source: Hacker News / 8 months ago
For my rather simple needs I've been using https://httptoolkit.com free edition, I like that it launches a independent Firefox window on its own for the intercepting so I don't have to touch my working browser or deal with configuring a... - Source: Hacker News / 10 months ago
This one is truly a gem: https://httptoolkit.com It even bypasses SSL pinning on Android using 1 click. - Source: Hacker News / 10 months ago
Tracking Diffyn since Jun 2025.
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