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Loyalty platform for local businesses - no app to download, no integrations. Customers collect stamps and points across every venue they join with one account.

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 | crabtap.com | diffyn.com |
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| Company | Startup from Poland · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


CrabTap is a digital loyalty platform built for small, local businesses - cafes, salons, barbershops, restaurants, and retail shops. Instead of a native app or complicated integrations, customers get one QR code that works across every participating venue - no separate card or app for every...
No description of Diffyn yet.
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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The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
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As answered by people managing CrabTap and Diffyn.
CrabTap's answer
No app to download, no complicated integrations - customers join with a single QR code that works across every business they visit. Most competitors either focus on large chains or require complex setup: CrabTap is built specifically for small, independent businesses that want something simple and affordable.
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.
CrabTap's answer
CrabTap keeps things simple: no native app to build or download, no long-term contracts, and no complex integrations to manage. It's priced and designed for single, independent venues rather than large chains.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
Diffyn's answer:
React, Next.js, POSTGRESQL
CrabTap's answer
Small, independent local businesses - cafes, salons, barbershops, restaurants, and retail shops - looking for a simple way to reward returning customers.
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
CrabTap's answer
CrabTap was built after noticing that most loyalty programs are either paper cards that get lost and forgotten, or expensive software built for big chains with features small businesses never use. CrabTap keeps the simplicity of a paper stamp card, just digitized in a way that actually works for one-person and small-team businesses.
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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Maximize sales and customer engagement with Kangaroo Rewards' Customer Loyalty platform. An all-in-one marketing solution that empowers you to reward, communicate, and target your customers to drive growth and deliver a premium customer experience.
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