Booking over WhatsApp, straight into Calendly. With Arbol, with no manual copying.
How it works
The patient writes on WhatsApp.
Arbol checks availability in Calendly and offers times.
It creates the event in Calendly and confirms on WhatsApp.
If they reschedule, it moves it in Calendly and lets them know.
What each one is
Customer messaging
WhatsApp
WhatsApp Business is WhatsApp's (Meta) offering for companies, and it comes in two versions. The WhatsApp Business app is free and built for small businesses: a business profile, a product showcase and automated replies, with limited customization and integration. The WhatsApp Business Platform is for medium and large businesses: it gives API access to message customers at scale, connect other systems and send template messages, which are billed per message.
Confirm appointments, send reminders and answer patient questions on the channel they already use.
WhatsApp has more than 3 billion monthly users, according to Mark Zuckerberg on Meta's first-quarter 2025 earnings call. Source: techcrunch.com (opens in a new tab)
Meta publishes the WhatsApp Business Platform Cloud API, built on the Graph API, to send text, media, interactive and template messages and to receive incoming messages and delivery statuses by webhook.
WhatsApp integrationOnline scheduling
Calendly
Calendly is a meeting scheduling platform founded in 2013 by Tope Awotona. Each user connects their calendars, sets their hours and shares a link or booking page where the other person picks an open time. It also sends email and text reminders, lets invitees reschedule without the back-and-forth, and can collect payment up front at booking.
Share a booking link so patients pick their appointment time based on each provider's schedule.
According to the company, more than 50 million people use Calendly, and more than 1.3 billion meetings have been booked on it. Source: calendly.com (opens in a new tab)
Calendly publishes a REST API, with OAuth 2.0 or a personal access token, to book meetings and read and write scheduling and contact data; its webhooks fire when someone books or cancels, and the booking page can be embedded on a website.
Calendly integration
Questions
Does it work with several Calendly calendars?
Yes: the assistant checks the availability of every Calendly calendar your organization connected before offering a slot.
Do WhatsApp or Calendly endorse Arbol?
No. WhatsApp and Calendly are trademarks of their owners and do not sponsor or endorse Arbol. Arbol works on your organization's side, with the accounts and processes you already have with each.
What happens to patient data?
They are health data, sensitive under your country's data protection law: processed for a stated purpose, with the patient's authorization and with encryption and isolation per organization. Every conversation is recorded and exportable.
Trademarks and logos belong to their owners. WhatsApp and Calendly do not sponsor or endorse Arbol. All integrations · Arbol's API
Let's look at WhatsApp and Calendly in your operation.
A 30-minute demo with your team: how you work today, what we connect first and how long it takes. You leave with a written proposal.