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The AI secretary on WhatsApp that answers clients, books appointments and cuts no-shows. Not just an auto-responder: a real AI virtual secretary Assistant that respond to your customers and patients

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 | wably.app | diffyn.com |
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| Platforms | — | |
| Company | 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


Wably is an AI powered virtual receptionist that works directly inside WhatsApp Business, helping appointment based professionals automate customer communication, scheduling, and follow up without changing the way their clients interact. Unlike traditional booking systems, Wably doesn’t send...
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.


Overall verdict
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Overall verdict
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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 Wably.app and Diffyn.
Wably.app's answer
Wably is an AI powered WhatsApp assistant that does far more than appointment booking. It answers questions about your services, manages appointments through natural conversations, adapts to your preferred communication style, handles confirmations, reminders, rescheduling, and calendar updates, and can even process manual calendar changes. New customers are automatically added to your contacts when they book, and Wably follows up after appointments to request reviews, helping businesses save time, reduce no shows, and grow their reputation.
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.
Wably.app's answer
Businesses choose Wably because it goes beyond scheduling. While most booking tools simply offer an online calendar, Wably acts as a virtual assistant inside WhatsApp, answering customer questions, booking appointments through natural conversations, managing reminders and rescheduling, adapting to the business’s communication style, handling calendar updates, automatically saving customer contacts, and requesting reviews after visits. The result is less administrative work, fewer missed appointments, better customer engagement, and more time to focus on delivering the service.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
Diffyn's answer:
React, Next.js, POSTGRESQL
Wably.app's answer
Wably is designed for service based businesses that rely on appointments and customer communication through WhatsApp. Its primary audience includes healthcare professionals, beauty and wellness businesses, consultants, tradespeople, and local service providers who spend significant time managing bookings, answering repetitive questions, and coordinating with customers. Wably is especially valuable for small and medium sized businesses looking to automate administrative tasks while maintaining a personalized customer experience.
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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External articles and on-site reviews we used to compare the two products.


run a physiotherapy practice and I was losing enquiries every evening and weekend. Since I started using Wably, patients get an answer straight away on WhatsApp and book themselves. Setup took minutes, reminders cut...
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When comparing Wably.app and Diffyn, you can also consider the following products.

Elily — free AI receptionist for WhatsApp that books appointments into Google Calendar.
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ManyChat lets you create a Facebook Messenger bot for marketing, sales and support.
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Create AI agents for WhatsApp, Slack, & Telegram in minutes. Automate customer support, lead generation, and appointment booking.
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Fresha Salon Software lets you handle your salon business from inventory management to client bookings and from marketing to payments.
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