
Portfolio Visualizer
SkewLab
EquityReplay
Honest Backtest Engine
Options Backtesting Engine
QuantConnect
ETFreplay.com
Create portfolio backtests quickly and easily by describing them in plain English. Our AI will find the relevant Stocks or ETFs and create the backtest for you.

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

Website, pricing, platforms and company facts side by side.
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| Website | portfoliobacktest.com | diffyn.com |
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| Company | Startup from Australia · 1 - 9 employees · 2025 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


I built Portfolio Backtest because I wanted an easy way to backtest hypothetical portfolios. Alternatives required you to fill out long complicated forms to construct the backtest but I wanted something where you could just describe what you wanted in plain english. Once created I wanted it to be...
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Walkthroughs and reviews on video.
Create Portfolio Backtest With Plain Language
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 Portfolio Backtest 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.
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