WhatsApp is the most widely used messaging app in the UK, with the vast majority of smartphone users checking it multiple times a day. For event organisers, WhatsApp broadcast lists offer a direct, personal, and highly effective way to reach potential attendees. Messages land in the same inbox as conversations with friends and family, which means they are almost always seen and read.
Used thoughtfully, WhatsApp broadcasts can become one of your highest-converting marketing channels. Used carelessly, they can feel intrusive and damage your reputation. This guide covers how to get it right.
What is a WhatsApp broadcast list?
A broadcast list allows you to send a single message to multiple contacts at once. Unlike a group chat, recipients receive the message as an individual message from you, not as part of a group. They cannot see who else received it, and their replies come to you privately. This makes broadcasts feel personal rather than spammy.
There is a key technical requirement: recipients must have your number saved in their phone contacts for the broadcast message to be delivered. If they have not saved your number, the message simply will not arrive. This means you need to actively encourage people to save your number, which we will cover shortly.
Each broadcast list can contain up to 256 contacts. If your audience is larger, you can create multiple lists (segmented by event type, location, or interest) and send to each one.
Building your broadcast audience
Because recipients need to have your number saved, building your broadcast audience requires an opt-in approach. This is not just a technical requirement but also a GDPR requirement. You must have clear, affirmative consent before sending marketing messages via WhatsApp.
The most effective approach is to offer something valuable in exchange for opting in. "Save our number and send us a message saying JOIN to get early access to tickets, exclusive discounts, and event updates via WhatsApp." This gives people a clear reason to take the two-step action of saving your number and sending the initial message.
Promote your WhatsApp number on your website (a clickable "wa.me" link makes it easy on mobile), in your email signatures, on social media bios, at your events (on signage and from the stage), and on your printed materials. Include a QR code that opens a WhatsApp chat with your number pre-filled.
When someone messages you to opt in, save their number immediately and add them to the relevant broadcast list. Confirm their subscription with a welcome message explaining what they will receive and how often.
GDPR compliance
WhatsApp marketing falls under GDPR and the Privacy and Electronic Communications Regulations (PECR). You need clear consent before adding someone to your broadcast list, and you must provide a straightforward way for people to opt out at any time.
Keep a record of when and how each person consented. Include an opt-out instruction in every broadcast message, something like "Reply STOP to unsubscribe." When someone opts out, remove them from your list promptly and do not message them again.
Do not buy phone number lists or scrape numbers from the internet. Apart from being a GDPR violation, messaging people who did not opt in will result in your number being reported and potentially blocked by WhatsApp.
What to send and when
The golden rule of WhatsApp broadcasting is to be valuable and respectful of people's attention. This is someone's personal messaging app. If your messages feel like spam, people will block you immediately.
Message types that work well
Ticket on-sale announcements. "Tickets for [event name] go on sale tomorrow at 10am. As a WhatsApp subscriber, here is your early access link: [link]." This is the highest-value message you can send, and the exclusivity of early access reinforces why people subscribed.
Lineup and programme announcements. Share exciting news directly. "Just announced: [headliner] will be performing at [event]. Full lineup at [link]." Keep it concise and link to your website for full details.
Last-chance reminders. "Final 50 tickets remaining for [event] on Saturday. Grab yours before they are gone: [link]." Urgency messaging works well on WhatsApp because the message is seen quickly.
Exclusive offers. Give your WhatsApp audience something they cannot get elsewhere. A small discount, early access, or a bonus (such as a free drink on arrival) rewards their loyalty and justifies staying subscribed.
How often to send
Less is more. One to two messages per week during an active campaign period is the maximum. Outside of campaign periods, one message per month is plenty to maintain the connection. Every message should provide genuine value, whether that is a ticket deal, an exclusive announcement, or useful information.
Send messages at reasonable hours. Between 10am and 8pm is appropriate. Never send marketing messages late at night or early in the morning.
Crafting effective broadcast messages
WhatsApp messages should be conversational, concise, and personal. Write as if you are messaging a friend, not drafting a press release. Use the recipient's name if possible (some broadcast tools support personalisation, though standard WhatsApp broadcasts do not).
Keep messages short. Two to three sentences plus a link is ideal. If you need to share more detail, link to a web page. Long messages get skimmed at best and ignored at worst.
Use emojis sparingly and appropriately. A single relevant emoji can add warmth and personality. A wall of emojis looks unprofessional. Include a clear call to action in every message: a link to buy tickets, a prompt to reply, or a request to share with friends.
WhatsApp Business features
If you are serious about WhatsApp marketing, consider switching to WhatsApp Business (the free app, not the paid API). It offers several features useful for event organisers: a business profile with your event details and website, automated greeting messages for new contacts, quick replies for frequently asked questions, and labels to organise your contacts by event, location, or interest.
The WhatsApp Business API (a paid product, typically accessed through providers like Twilio or MessageBird) offers additional capabilities including larger broadcast lists, message templates, and integration with CRM systems. However, it is more complex to set up and is primarily suited to larger operations sending thousands of messages.
Measuring results
WhatsApp provides basic metrics for broadcast messages: how many were delivered and how many were read (if read receipts are enabled). For tracking ticket sales, use UTM-tagged links in your messages so you can see WhatsApp-driven traffic and conversions in your website analytics.
Track opt-out rates after each broadcast. If a particular message triggers a spike in unsubscribes, it is a signal that the content or frequency was not right. Learn from this and adjust.
WhatsApp broadcast lists are a powerful but intimate channel. Treat your subscribers' attention with respect, provide genuine value, and maintain proper consent records. Done well, it is one of the most direct and effective ways to drive ticket sales. For a broader promotional strategy, combine WhatsApp with the techniques in our guides on building a pre-launch hype campaign and growing an events newsletter from zero. The key is to use each channel for what it does best, and WhatsApp's strength is personal, timely, high-impact messaging.
