How to use Twilio to send appointment notification and reminder SMS in Zoho Bookings

How to use Twilio to send appointment notification and reminder SMS in Zoho Bookings

Hit no-shows out of the ballpark by combining Zoho Bookings and SMS providers.

SMS notifications help you remind customers of their appointments and reduce no-shows by reaching out where they are.

In this guide, we'll configure an SMS provider called Twilio.

Prerequisites

  • A Twilio Subscription
    • You need at least one number to send messages from. It can be a short code, your personal number, a local number, or anything else. Twilio charges monthly for phone numbers. Check out Twilio's pricing page for more details.
    • Since Twilio uses a pay-as-you-go model, there are no monthly commitments (except the sender number). The minimum recharge value is $20, and you can use it until the credits expire - Learn more about Twilio's pricing model here.

Things to Know Before Using Twilio

  • You can share your Twilio subscription amongst multiple admins (if required).
  • Twilio is responsible for everything except configuring SMS text (You can configure this inside Zoho Bookings).
  • Both single and dual way communication is possible with Twilio
  • Using Twilio, you can send messages across borders.
    • Case 1: When you send messages from a US number to an Indian number, sender IDs might change. It ensures the deliverability of messages.
    • Case 2: SenderIDs don't change when the sender and the recipient numbers belong to the same country.
  • Twilio charges for text messages on a segment basis. (1 segment = 160 Characters). For instance, if you send an SMS with 200 characters, you'll be charged for two SMS credits - Learn more about it here.
  • To find the number of SMS you'll be able to send with your top-up, use this formula:
    • Number of SMS that can be sent = (Top Up Value - Phone Number Price)/ Message Per SMS
    • Let's assume you belong to the US and recharge for $20. You've also opted for a long code that costs $1.16 (with carrier fees), the equation would look like
    • Number of SMS that can be sent* = ($20 - $1.16)/ ($0.0079) = 2200.
    • You'll be able to send approximately 2200+ SMS with this. (If you don't buy additional phone numbers in the US)
    • Note - The calculation is only an approximate estimation of the number of messages that you can send. This is because factors like carrier fees, and per-message rate change often and vary widely across different service providers.
  • Twilio credits are one-off amounts that don't expire until you use them.
  • Your Twilio account will get suspended once your account balance reaches zero. To avoid this, Twilio sends a notification to your email requesting you to refill your funds when the balance hits $5.
  • Another way to prevent your account from hitting zero you can set up an auto-recharge trigger for a minimum of $10. When your balance hits $10, you can automatically set it up to top up your account. Check out this page for setting up automatic payment triggers.
     

A2P 10 DLC Registration (only if you wish to send messages to the US)

Note - This is only necessary if you send messages to the United States. (Regardless of where you send your messages from - inside or outside the US)
  • If you send messages to the US, you should register for A2P 10 DLC. (Application to Person 10 Digit Long Code messaging protocol)
  • A2P 10DLC is a secure way to communicate with businesses and ensures that the messages are relevant to the recipients. We highly advise you to register for A2P 10 DLC Protocol as numbers without it will incur higher fees and even service disruptions from June 1, 2023. This is to comply with US messaging regulations. You can learn more about it here.
  • A2P 10 DLC registration is only possible with a Twilio premium subscription and not for trial accounts.
  • To do this, navigate to Phone Numbers > Manage > Active Numbers > Click on a Number.

  • Under Messaging Configuration, click on 'Go to 10DLC registration.'



Note - You cannot integrate multiple SMS providers to Zoho Bookings simultaneously.



Configuring Twilio with Zoho Bookings

1. Sign in to your Twilio account. (Sign up here if you don't have one)



2. You'll be redirected to the following screen once you've signed up. Check your mail inbox.


3. Your email would look like this. Confirm your account.



4. Twilio asks you to secure your account with a phone number. Enter your number and click on Send verification code/Get code via phone call depending on your choice.



5. Once you've confirmed your phone number you can fill in the onboarding form and click on get started with Twilio.



6. You'll be redirected to the Twilio dashboard.


  • 'My first Twilio account' is the account name of your Twilio SMS account. If you have multiple Twilio SMS accounts you can navigate it from here
  • The Phone numbers tab helps you to
    • Manage all your Phone numbers
    • Buy new Numbers
    • Release a Phone number
  • When you sign up for a Twilio account, you'll get $15.50. You can get a trial number using this to test their configurations before opting for a premium plan.
7. Let's get a phone number from Twilio. Click on 'Get a Twilio Phone Number.'



8. Twilio will assign you a phone number. Now let's configure Twilio with Zoho Bookings.



Note - To get a premium number, navigate to Phone numbers > Manage > Buy a Number
 
Choose which country's number you wish to get, SMS (as capability), and click search. You can click on buy to obtain the number.



9. Scroll to the bottom of Twilio's main dashboard. You'll find three fields here, Auth Token, Account SID, and your Phone number. We'll paste all this data to integrate Zoho Bookings and Twilio.'



10. Now log in to your Zoho Bookings Dashboard. Navigate to Integrations > Others > Twilio. Hover over Twilio and click on Configure.



11. Copy and paste the details from Twilio to the corresponding fields in Zoho Bookings. Once you have pasted the details, click 'Configure.'
 
Note: While pasting the phone number, remove the country calling code. In this case, my phone number was +13203628918. '+1' is the country calling code. Remove it and paste the rest (i.e., 3203628918 without any spaces/symbols in between)



12. Hover over the created Twilio connection and click enable. Reload the page if the connection is still not active. You've successfully integrated Twilio with Zoho Bookings.


Editing Your Twilio Connection

To edit your Twilio connection, hover over the Twilio integration and click on edit. Once you've made the changes, click Configure.



If you wish to remove your Twilio connection, hover over the Twilio integration and click remove.



A pop-up appears asking you to confirm. Click 'Proceed' to delete your Twilio connection.



Note - While Editing or Removing your Twilio connections, if the changes don't reflect immediately, reload the page for the changes to reflect.

Configuring SMS Notifications

To configure SMS notifications for one on one bookings, navigate to services > service notification.



To configure SMS notifications for group/ resource bookings, navigate to settings > workspaces > notifications.


You'll see two tabs here. 'For Staff' and 'For Customers.' Zoho Bookings allows you to send eight different types of SMS under each tab.



You can configure Zoho Bookings to send SMS using Twilio when you change the appointment status to
  • Booked
  • Rescheduled
  • Canceled
  • Marked As Completed
  • Marked As No Show
Alternatively, you can set up to three reminders before your appointment time.



Illustration: Let's send SMS notifications to a customer when an appointment(one-on-one) is booked.

  1. Make sure that the checkbox is enabled corresponding to the booked notification in the customer tab. It ensures that the customer receives an SMS notification when an appointment is booked.


 2. To customize the messages that will be sent, click on customize. You can change the message and insert dynamic variables like meeting info, customer name, meeting date, and more into your outgoing messages. Click 'Save' once you are done with the changes.



The customer receives the following message when an appointment is made.


Note that the message is from the number '59039000' and not my original phone number. This is because the message is sent from a US number to an Indian Number. So the original long code is replaced with this number to ensure seamless deliverability.
 
If the sender and recipient belong to the same country, then the SenderID (i.e., your phone number) doesn't change.
 
There are cases where you might want to block incoming messages. For example, customers might reply to your SMS notifications requesting a reschedule or cancellation. This breaks the flow of Zoho Bookings and introduces unnecessary manual work. If that's the case, check out this document to block all incoming messaging.

SMS Customization Recommendations

  • Since each message can accommodate only 160 characters, we recommend keeping your message crisp. Include vital info like appointment date, time, and business name.
  • Avoid using emojis in your sms. As a single emoji consumes a lot of characters.
  • We recommend you have your entire message length from 160 to 320 characters (i.e., 1 to 2 messages per message) to avoid consuming too many message credits for a single SMS.

Zoho Bookings Plans supporting this feature

Applicable in
Premium

If you want to start a trial of the Zoho Bookings Premium plan, please send an email to support@zohobookings.com including the word 'Twilio' in the subject line.

I want to try this!

    • Recent Topics

    • can I link a contacts to multiple accounts

      can I link a contacts to multiple accounts

    • Free webinar! Digitize recruitment and onboarding with Zoho Sign and Zoho Recruit

      Hello, Tired of being buried in onboarding paperwork? With the integration between Zoho Sign and Zoho Recruit, a powerful applicant tracking system, you can digitize and streamline the entire recruitment and onboarding process, all from one platform.

    • is it possible to add more than one Whatsapp Phone Number to be integrated to Zoho CRM?

      so I have successfully added one Whatsapp number like this from this User Interface it seems I can't add a new Whatsapp Number. I need to add a new Whatsapp Number so I can control the lead assignment if a chat sent to Whatsapp Phone Number 1 then assign

    • Open Activities view.

      I really like the new views for the open and closed activities inside the deals. But when you are in the tab view instead of the column view you can only complete and edit the open activity there isn't the 3 dot option to be able to delete the activ

    • Potentially Outdated and Vulnerable Chromium Engine Installed by Ulaa Browser Installer

      I just installed Ulaa Browser a few minutes ago. Whats My Browser page shows I am using an outdated Chromium engine meaning I might be vulnerable for security exploits that might have got fixed in the new version.

    • Potentially hardcoded list of Browsers to import from (after Ulaa Setup)

      I have just installed Ulaa Browser and found that the list of browser to import data is potentially hardcoded ones rather than looking at the system. I do not have FF, IE and Edge is not my default itself. I would appreciated if Ulaa detected my browsers

    • From Layout to Code: Finding Custom Field IDs in Zoho Projects.

      Hello everyone! Ever found yourself wondering how to get the API names and IDs of custom fields in Zoho Projects while working on custom functions? Here’s a simple and effective way to do it! This method makes it super easy to locate the right field details

    • Session Expired

      I constantly get "Session Expired" and need to relogin or close and open the application again. This gets really frustrating during the day. Is this something that can be solved? This really makes me want to leave the app as it is no go to need to reopen

    • Employee type and source translation

      In Zoho People, when I fill in the employee’s information, there is the option to determine the type of employment (employee type) and the hiring source. Both options ALWAYS appear in English. It is extremely inconvenient to deal with poorly translated

    • Sync Issue Between Zoho Notebook Web App on Firefox (PC) and Android App

      Hi Zoho Notebook Community, I'm facing a sync problem with Zoho Notebook. When I use the web version on Mozilla Firefox browser on my PC, I create and save new notes, and I've synced them successfully. However, these new notes aren't showing up in my

    • Request for Clarity on Timeline for True GPT/Zia Auto-Response Capabilities

      I appreciate Zoho’s steady innovation, but I’m concerned that Desk and Zia remain well behind modern AI capabilities. For years, GPT-based tools have been able to generate and send contextual responses, yet Zoho Desk only supports summarization or suggested

    • Notebook audio recordings disappearing

      I have recently been experiencing issues where some of my attached audio recordings are disappearing. I am referring specifically to ones made within a Note card in Notebook on mobile, made by pressing the "+" button and choosing "Record audio" (or similar),

    • Has anyone built a ticket export that allows Help Center users to export the tickets shown in the My Area list they are looking at?

      Hi, We are moving to Zoho Desk soon. Our current support system displays an option in our help center allowing customers to export their Open, Closed, or all tickets based on which list they are looking at. We need to offer the same in Zoho Desk help

    • Two factor authentication for helpdesk users

      The company i work for wants use the helpdesk site in Zoho desk, as a place for their distribution partners to ask question and look for information about our product. The things there is suppose to go up there is somewhat confidential between my company

    • Zoho Desk: Q2 2025 | What's New

      Hello everyone, We are excited to announce Zoho Desk's 2025 Autumn updates. This release brings new features and enhancements that improve work management and enable businesses to provide a better overall support experience. Spanning from Zia Agents to

    • Committed Stock and To Be Received Stock via API?

      Is it possible to retrieve Committed Stock and/or To Be Received Stock for an Item via the API? I want to use this information for calculating the amount of inventory needed to be purchased.

    • Checkboxes not adhering to any policy in mail merge - data from CRM

      I want checkboxes to appear depending on whether the checkbox in the CRM module is ticked or not. However, the tickboxes that appear are either ticked or not, but don't correlate to the actual selections in the CRM module. This is is despite updating

    • Items Landed Cost and Profit?

      Hello, we recently went live with Zoho Inventory, and I have a question about the Landed Cost feature. The FAQ reads: "Tracking the landed cost helps determine the overall cost incurred in procuring the product. This, in turn, helps you to decide the

    • CC and/or BCC users in email templates

      I would like the ability to automatically assign a CC and BCC "User (company employee)" into email templates. Specifically, I would like to be able to add the "User who owns the client" as a CC automatically on any interview scheduled or candidate submitted

    • Create Contract API Endpoint Unclear "inputfields" Requirements

      Hello, I'm trying to create a Deluge function that accepts inputs from a form in Zoho Creator and creates a barebones contract of a given type. See below for the current code, cleaned of authentication information. // Fetch form data // Hidden field client_name

    • Kaizen #46 - Handling Notes through Zoho CRM API (Part 1/2)

      Hello everyone! Welcome back to another week of Kaizen! This week, we will discuss Handling Notes through Zoho CRM API. What will you learn from this post? Notes in Zoho CRM Working with Notes through Notes APIs 1. Notes in Zoho CRM 1a. Why add Notes to records? Notes are a great way to summarize your observations on customer and prospect interactions and outcomes. By saving notes as CRM data, a sales rep will always be able to keep track of how a sale is progressing. To know more about notes in

    • Marketer's Space - Why email marketing matters in ecommerce (and how to get started with Zoho Campaigns)

      Hello Marketers, Welcome to this week's Marketer's space post. Today, we'll discus why email marketing matters in ecommerce businesses. Running an online store is exciting but challenging. If you're running an online store, you've probably experienced

    • Zoho Campaigns Event timestamps do not propagate to Zoho CRM

      We have integrated Zoho CRM and Zoho Campaigns. But when looking at Contact records, the Campaign event data is missing the actual timestamps: especially when a particular email was sent. They're not in the Campaigns related list, and the cannot be found

    • Kaizen #121 : Customize List Views using Client Script

      Hello everyone! Welcome back to another interesting Kaizen post. In this post, we can discuss how to customize List Views using Client Script. This post will answer the questions Ability to remove public views by the super admin in the Zoho CRM and Is

    • Setting default From address when replying to request

      At the moment, if I want to reply to a request, the From field has three options, company@zohosupport.com, support@company.zohosupport.com, and support@company.com.  The first two are really internal address that should never be seen by the customer and

    • Tip #45 - Explore Your Support Reach with Zoho Assist’s Geo Insights - 'Insider Insights'

      Understanding where your remote support sessions are happening can help you make smarter decisions, allocate resources effectively, and improve overall customer satisfaction. In this week's Zoho Assist's community post we will be exploring Geo Insights

    • Formatting of text pasted into Zoho documents

      Howdy, I'm a newbie and finding Zoho an improvement to MS Word. Consider yourself hugged. High on my wish list would be plain text cut-and-paste. When pasting text from the web to Zoho, presently Zoho imports the formatting along with the text. This means that every cut-and-paste operation brings in text in a different font, size, or style. Can we have at least the option of importing plain text without formatting (or better yet, is this option already out there?) ... Thanks Helen

    • Add additional features to Zoho Tables

      Zoho Tables is a really great tool, why not add features like diagramming capability into the tool from applications like Draw.io which I believe is open source, you should be able to do wireframes, process flow diagrams, network design, etc. Please note

    • The Social Wall: August 2025

      Hello everyone, As summer ends, Zoho Social is gearing up for some exciting, bigger updates lined up for the months ahead. While those are in the works, we rolled out a few handy feature updates in August to keep your social media management running smoothly.

    • The Social Wall: July 2025

      Hello everyone! July has brought some exciting new updates to Zoho Social. From powerful enhancements in the Social Toolkit to new capabilities in the mobile app, we’ve packed this month with features designed to help you level up your social media presence.

    • Use Zoho Creator as a source for merge templates in Zoho Writer

      Hello all! We're excited to share that we've enhanced Zoho Creator's integration with Zoho Writer to make this combination even more powerful. You can now use Zoho Creator as a data source for mail merge templates in Zoho Writer. Making more data from

    • Tagged problem !!!

      Damn it, we're one of dozens of construction companies in Africa, but we can't link purchasing invoices to projects. Why isn't this feature available?

    • Syntax for URLs in HTML Snippets

      What are some best practices for inserting a URL in an HTML snippet? I've looked at Zoho Help articles on navigation-based and functional-based URLs, but I'm still unclear on how to incorporate them in an HTML snippet. For example, 1. How do I link to

    • The Social Wall: June 2025

      Hello everyone, We’re back with June Zoho Social highlights. This month brought some exciting feature updates—especially within the Social Toolkit—to enhance your social media presence. We engaged with several MSME companies through community meet-ups

    • Make panel configuration interface wider

      Hi there, The same way you changed the custom function editor's interface wider, it would be nice to be able to edit panels in pages using the full width of the screen rather than the currently max-width: 1368px. Is there a reason for having the configuration panel not taking the full width? Its impossible at this width to edit panels that have a lot of elements. Please change it to 100% so we can better edit the layouts. Thanks! B.

    • Tip 7: How to fetch data from another application?

      Hi everyone, Following our Zoho Creator - Tips and Tricks series every fortnight, we are back today with a tip based on one of the most popular questions asked in our forum. This tip would help you fetch data from another application(App B) and use it

    • The Social Wall: May 2025

      Hey everyone, We're excited to share some powerful updates for the month of May! Let's take a look! Reply to your Instagram and Facebook comments privately through direct messages Are you tired of cluttered comment threads or exposing customer queries

    • Sub-Form Fields as Filters for Reports

      Hi, I would like to use the Sub-Form Fields as Filters in Reports just like we do for Main Page Fields. Thanks Dan

    • Zoho CRM Formula - Current Time minus Date/Time field

      Hello, I am trying to prevent duplicate emails going to clients when more than 1 deal is being updated. To do this, I would like to create a formula to identify if a date/time field is >= 2 hours ago. Can someone please help me write this formula? Example:

    • Billing Management: #7 Usage Billing in Telecom & Internet Service Provider

      Telecom and Internet Service Providers operate in markets where usage varies drastically from one customer to another. While flexible, usage-based models align revenue directly with consumption, they also introduce operational challenges like real-time

    • Next Page