
Insomnia REST
Postman
RapidAPI for Mac
Requestly
HTTPie
Thunder Client
API Fortress
Open source API development ecosystem

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, Hoppscotch seems to be more popular. It has been mentioned 102 times since March 2021.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | hoppscotch.io | diffyn.com |
| Pricing | ||
| Platforms | ||
| Company | 2019 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


An open sourced free, fast and beautiful API request builder.
No description of Diffyn yet.
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.
Hoppscotch - A free, fast and beautiful API request builder - Open Source Friday
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 Hoppscotch 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 Hoppscotch 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.


Hoppscotch, formerly known as Postwoman, is a lightweight, open-source API development ecosystem that emphasizes speed and simplicity as a decent postman alternative.
Hoppscotch, previously known as Postwoman, is an open-source API request builder. This tool is highly valued by developers for its user-friendliness and versatility for handling various API requests. These include...
You can access Hoppscotch without an account. Hoppscotch has a specialized user interface for Restful, GraphQL, and Web socket connections. Using Hoppscotch’s Environment and Variable features, you can submit requests...
We have no reviews of Diffyn yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Hoppscotch is open-source, runs in the browser, and does everything I used Postman for. Collections, environments, WebSocket testing — all there. - Source: dev.to / 6 months ago
TL;DR: For AI-native test generation from specs, try Kusho AI. For the most complete platform with the newest AI Agent Mode, go Postman. For open-source and Git-native workflows, Bruno or Hoppscotch are your best bets. Enterprise teams... - Source: dev.to / 6 months ago
Enter Hoppscotch, the open-source API development suite that’s rapidly gaining popularity. It’s a powerful, lightweight, and beautifully designed tool that challenges the way we think about API testing and collaboration. - Source: dev.to / 10 months ago
Tracking Diffyn since Jun 2025.
When comparing Hoppscotch and Diffyn, you can also consider the following products.

Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a dev‑friendly UI, built-in automation, and an extensible plugin ecosystem.
Compare Insomnia REST to Hoppscotch or Diffyn:




CLI HTTP that will make you smile. JSON support, syntax highlighting, wget-like downloads, extensions, and more.
Compare HTTPie to Hoppscotch or Diffyn:

Rest API client for VS Code, lightweight Postman alternative
Compare Thunder Client to Hoppscotch or Diffyn: