Free WhatsApp bulk message sender.
Without losing your number.

There are four ways to send one message to many people on WhatsApp. Three of them can be free. They differ in how many people you reach, whether the message is personal, and how much risk you put on your number.

The WhatsApp Business app has broadcast lists built in. Each person gets your message in a private chat, as if you’d sent it to them alone. It’s free, and it’s the safest route, with two limits:

• 256 contacts per list. You can make several lists, but each send goes to one list.
• Only people who saved your number receive it. Everyone else gets nothing, and you aren’t told.

To make one on Android, tap the three-dot menu and choose New broadcast; on iPhone, look for Broadcast lists in the Chats tab. Then pick your contacts. Broadcast lists work well for regular customers who already have you saved. They don’t reach new leads or anyone you haven’t saved yourself.

Search for a free WhatsApp bulk sender and most results are Chrome extensions. They automate WhatsApp Web in your browser, typing and sending each message as if you clicked. They’re easy to start with, but:

• They send at machine speed unless you slow them down, and a burst of identical messages is the pattern WhatsApp flags.
• They read your WhatsApp. An extension that controls WhatsApp Web can see every chat in it.
• Your browser must stay open for the whole send, on a computer that doesn’t sleep.
• Free tiers are small, and the useful features such as attachments, gaps and personalisation usually sit behind a paid upgrade.

For marketing to large opted-in lists, the Business API is the official route. You send pre-approved templates through a provider such as WATI, AiSensy or Interakt. It isn’t free: Meta charges for every delivered marketing message (₹0.8631 per message in India, $0.025 in the US), on top of the provider’s plan. Meta also limits how many people a new number can message each day, and raises the limit as your quality rating stays high.

If you send tens of thousands of offers a month, this is where you should be. See is the WhatsApp Business API free? for what it costs.

Wapzen’s Bulk Messages sends one personalised message to everyone on a contact sheet, from your own WhatsApp number, one at a time. It runs on Wapzen’s servers, so you can close your laptop. It’s free, like the rest of Wapzen.

1. Link your WhatsApp number by QR code or pairing code, if you haven’t already.
2. Upload your contacts: Excel (.xlsx or .xls), CSV, OpenDocument, or a text file with one number per line. Wapzen finds the phone column and adds your country code to local numbers.
3. Write the message with placeholders from your sheet’s columns, such as {{Name}} or {{Order}}. Save it as a template to reuse.
4. Pick the gap between messages: 30 seconds by default, anywhere from 10 seconds to an hour.
5. Start the send. Watch each recipient’s status, and pause, resume or cancel at any time. Numbers that aren’t on WhatsApp are marked failed instead of retried.

At the default gap, 500 contacts take a little over four hours. Each send holds up to 5,000 numbers, and every message is saved to that contact’s conversation in your dashboard.

WhatsApp’s terms forbid bulk and automated messaging outside its Business Platform. That covers browser extensions, linked-device tools and Wapzen alike, so no free sender is risk-free. What gets numbers restricted in practice is people blocking and reporting them. This checklist keeps that low:

• Message only people who know you: customers, enquiries, members, people who gave you their number for this.
• Personalise every message. Use the person’s name and something specific to them. A thousand identical messages look like spam, because they are.
• Keep a gap between sends, and use a longer one for a big list.
• Start small on a new number or a new list: send to 50 people, watch the replies, then continue.
• Ask something worth answering. Replies tell WhatsApp people want your messages.
• Offer a way out. End promotional messages with “Reply STOP to opt out”, and remove those people from the list.
• Skip bare links and URL shorteners in a first message.
• Fill in your business profile with your name, logo and address, so people recognise you.
• Don’t send late at night, and stop if blocks or angry replies pile up.

For large marketing campaigns to people who opted in, use the official Business API. Wapzen’s Bulk Messages is built for messaging your own customers, not for cold lists.

Each one uses placeholders from your sheet. Rename them to match your column headers, and keep the question at the end, because replies help your number’s standing.

This is where a free bulk sender usually leaves you alone with hundreds of replies. On Wapzen, replies reach your AI agent, which answers each one from your instructions and knowledge base, in the customer’s language, and can take an order with the Take Order tool. Every reply also appears in your dashboard, so you can step in yourself.

One thing to set up first: the AI agent doesn’t see the bulk message itself when a contact replies. Put the offer’s details, such as product, price and end date, in the agent’s instructions or knowledge base before you send, so it can answer “Is this still on?” correctly.

New to the AI agent? Read free WhatsApp AI agent to set it up.