How to send one WhatsApp message to many subscribers at once with ChatSyncs’s Broadcast Campaign — choosing 24 Hours vs Anytime, picking an approved template, targeting an audience by label/country/custom field, building the message as a flow, and reading delivery/open/unreached statistics. Use when a customer asks how to send a bulk WhatsApp message, run a promotion to a customer segment, or why some recipients didn’t get a broadcast.
Broadcast Campaign sends one message to many WhatsApp subscribers at the same time, instead of
messaging each person individually. Every campaign you create shows up in the WhatsApp
Broadcasting list along with its delivery and engagement statistics.
Clicking Create opens an Action Button configuration panel set to Broadcasting — fill
in the campaign here:
1
Campaign Name
An internal name to identify the campaign, e.g. Summer Promotion Campaign.
2
Broadcast Type
24 Hours sends only to subscribers currently inside the WhatsApp 24-hour customer
service window — regular messages, no template approval required. Anytime sends to all
selected subscribers regardless of window, but because some of them are outside it, only an
approved WhatsApp template can be used. See
the 24-hour customer service window.
3
Select Template (Anytime only)
Pick an approved template. This step only appears for Anytime — inside a 24 Hours
broadcast you’re free to send any message type (text, service/session messages, etc.), so
no template is required. Templates fall into Marketing, Utility, and Authentication
categories — Utility conversations may be free in
certain scenarios, while Marketing and Authentication are charged per Meta’s current
pricing. Always verify current pricing with Meta.
4
Target the audience
Narrow who receives the broadcast: Include Label IDs (e.g. Customers, Leads, VIP
Customers) and Exclude Label IDs (e.g. Unsubscribed, Do Not Disturb) filter by segment;
Country of the Subscriber filters by location; Custom Field + Custom Field
Contains Value filters by a chatbot custom field (e.g. Plan Type contains Premium).
5
Use Recently Added Subscribers (optional)
Enable this to target only recently added subscribers — useful for welcome campaigns,
onboarding sequences, or new-lead engagement.
6
Assign Label After Broadcast (optional)
Auto-assign a label (e.g. Broadcast Sent, Campaign 2025) to every subscriber once the
broadcast sends successfully, so you can track participation and build future segments.
When Broadcast Type is set to 24 Hours, the panel shows a live Targeted subscribers
count alongside the Daily WhatsApp Business Account (WABA) conversation limit — so you can
see how many subscribers your filters actually match, and how that compares to your daily cap,
before you send anything.
When a customer replies to a 24-hour broadcast, a new 24-hour window automatically opens —
letting you keep messaging them without an approved template. Including interactive buttons or
a clear call-to-action in the broadcast encourages replies, which refreshes the window and
reduces how often you need paid template messages.
After saving the campaign settings, the canvas opens — it works just like the Bot Reply
builder. A Start Bot Flow block is already connected to the Actions: Broadcasting block;
drag on more blocks to design what subscribers receive.
You can add the same component types available in Bot Reply: Text, Images, Videos, Documents,
Audio Files, Interactive Buttons, Quick Replies, CTA/URL Buttons, Lists, Forms, Conditions,
Actions, and AI Responses. Drag blocks from the Flow blocks panel and connect them to design
the journey, for example:
Once a campaign is sent, the WhatsApp Broadcasting list shows its Campaign Name,
Status (Completed, Pending, Processing, etc.), Scheduled At time, and four metrics:
Metric
Meaning
Example
Processed
Subscribers the system attempted to send to
Sent (100%) — 11/11
Delivered
Messages successfully delivered
Delivered (64%) — 7/11
Opened
Recipients who opened the delivered message
Opened (43%) — 3/7
Unreached
Subscribers who could not receive the message
Unreached (27%) — 3/11
Unreached messages are usually caused by invalid phone numbers, the user not being on WhatsApp,
blocked accounts, or other delivery failures.
View Report — detailed broadcast statistics and recipient information.
Download Report — exports the report as a CSV for analysis and record keeping.
Resend Failed Messages — retries delivery for messages that failed, e.g. after correcting
invalid phone numbers.
Delete Campaign — removes the campaign from the list.
Example:Product_Launch completed with Processed 11/11, Delivered 7/11, Opened 3/7,
Unreached 3/11. After fixing the numbers behind the 3 unreached sends, Resend Failed
Messages retries delivery to just those subscribers.
How do I send a WhatsApp message to many subscribers at once?
Go to WhatsApp → Broadcasting → Create, configure a campaign name, broadcast type, and
audience filters, then build the message on the canvas (just like a Bot Reply flow) and
save. The campaign sends to every subscriber matching your filters.
What's the difference between a 24 Hours broadcast and an Anytime broadcast?
24 Hours only reaches subscribers currently inside the WhatsApp 24-hour customer service
window and can send regular messages with no template approval needed. Anytime reaches
everyone you select regardless of window, but because some recipients are outside it, it
requires an approved WhatsApp template.
Why didn't all my subscribers receive the broadcast?
Check the Unreached statistic on the campaign — common causes are invalid phone numbers,
the subscriber not being on WhatsApp, blocked accounts, or other delivery failures. Fix the
underlying issue (e.g. correct the number) and use Resend Failed Messages to retry.
Can I target only specific subscribers, like VIP customers or one country?
Yes — use Include Label IDs for segments like VIP Customers, Exclude Label IDs to
skip segments like Unsubscribed, Country of the Subscriber to filter by location, or
Custom Field + Custom Field Contains Value to filter on a chatbot custom field such
as Plan Type.
Can I reuse a broadcast campaign I already built?
Yes — from Bot Manager → Broadcast Campaign, use Duplicate to reuse the flow with
minor changes, or Copy to Other Bot to bring the same campaign to another bot on your
account.
Anytime broadcasts require an approved template — Meta blocks unapproved templates and
plain text sent outside the 24-hour window.
The Daily WABA conversation limit caps how many subscribers can actually be reached, even
if your audience filters match more than that — check the live Targeted subscribers count
against the daily limit before sending a 24-Hours broadcast.
Unreached subscribers aren’t automatically retried — use Resend Failed Messages after
fixing the underlying issue (e.g. an invalid number).