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

Serve
MAMP
node-http-proxy
XAMPP
Local HTTPS previews for static websites

Website, pricing, platforms and company facts side by side.
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| Website | diffyn.com | mamp.info |
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| Company | — | Startup from Germany · 2026 |
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In their own words, as submitted to SaaSHub.


No description of Diffyn yet.
serrv is a native macOS app for previewing static websites locally on a real web server — at a proper address like https://portfolio.local/, with a trusted certificate and the secure lock icon, exactly as the site will look once published. Opening a finished site as a file (file://) breaks things...
What each product offers, as listed by its team.


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


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Walkthroughs and reviews on video.
The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Diffyn and serrv.
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.
serrv's answer:
serrv previews static websites on a real local web server at a trusted address like https://portfolio.local/ — with a valid certificate and the secure lock icon, in every browser including Firefox. Unlike opening files directly (file://) or a plain dev server on http://localhost:port, serrv reproduces a real production origin, so root-relative paths, clean URLs, fetch()/ES modules, service workers and secure-context APIs all behave exactly as they will once published.
Diffyn's answer
Diffyn is the platform that specializes on both change management and multi-model analysis.
serrv's answer:
Most local dev tools (MAMP, Laravel Herd, Valet) are built around PHP and databases. serrv is deliberately static-only and focuses on one thing done well: a real, trusted HTTPS address for your finished site, with zero setup. No port numbers, no self-signed certificate warnings, no Firefox workaround, and all your sites stay available at once. It complements your SSG dev server rather than replacing it — keep astro dev or eleventy --serve for editing, use serrv as the final check on a real address.
Diffyn's answer
React, Next.js, POSTGRESQL
serrv's answer:
serrv is a native macOS app (macOS 15+). The local web server is powered by Caddy, and file transfer in serrv max uses rclone. It runs entirely on your Mac — no cloud and no account required.
Diffyn's answer
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
serrv's answer:
Developers and designers who build static websites — by hand, with static site generators like Eleventy, Astro or Hugo, or with AI tools. Anyone who wants to verify a finished build exactly as it will look live before publishing, especially those testing HTTPS-only behavior like service workers or secure-context APIs.
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.
serrv's answer:
serrv comes from MAMP GmbH, long known for local development environments on the Mac. As static sites and static site generators became mainstream, a recurring problem stood out: a finished static site opens fine on a live server, but double-clicking it locally quietly breaks — missing assets, dead links, no lock icon, disabled secure-context features. serrv was built to close that gap with a deliberately simple, static-focused Mac app.
serrv's answer:
serrv is newly launched; it's used by independent developers, designers and studios building static sites on macOS.
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