How to Send Bulk Messages in WhatsApp: Complete Step-by-Step Guide

What Does "Bulk Messaging" Mean in WhatsApp?

Sending bulk messages in WhatsApp means delivering the same message, , to multiple contacts at once. Businesses use bulk WhatsApp messaging for:

• Payment reminders: chasing overdue invoices at scale
• Appointment confirmations: reducing no-shows for clinics and salons
• Order updates: shipping and delivery notifications
• Marketing campaigns: promotions, product launches, and re-engagement
• Event announcements: reminders and follow-ups for webinars or launches

WhatsApp has a 98% message open rate, which makes it the highest-performing channel for time-sensitive business communications.

3 Ways to Send Bulk Messages in WhatsApp

Method 1: WhatsApp Broadcast Lists (Built-In, Free)

WhatsApp's native broadcast feature is available inside the app and lets you send a single message to multiple recipients at once. Each recipient receives the message as an individual chat. Not a group message, so it feels personal.

How to use broadcast lists:

1. Open WhatsApp → tap the three-dot menu → New Broadcast
2. Select up to 256 contacts
3. Type your message and send

Limitations to know:

• Maximum 256 contacts per broadcast list
• Recipients must have your number saved in their contacts; otherwise the message won't deliver
• No scheduling, automation, or analytics
• Entirely manual. Not scalable for large lists

Best for: Personal use or very small businesses with fewer than 200 contacts who want a free, no-setup option.

Method 2: WhatsApp Business API (Official, Per-Message)

Meta's official WhatsApp Business API allows unlimited bulk messaging through pre-approved message templates. You access it through a Business Solution Provider (BSP) like Twilio or MessageBird.

How the API process works:

1. Apply for API access through Meta Business Manager
2. Get verified and onboarded through a BSP (this takes days to weeks)
3. Create and submit message templates for Meta's approval
4. Send bulk messages via programmatic API calls

Key limitations:

• Per-conversation charges ($0.005–$0.08 per conversation depending on country and category)
• Every message template requires approval before sending
• Business verification process adds days or weeks of lead time
• Requires developer resources to build and maintain integrations

Best for: Large enterprises with dedicated engineering teams and compliance requirements.

Method 3: WhatsApp Automation Tools (Flat-Rate, Scalable)

Tools like Walytic use WhatsApp's linked device technology, , to send bulk messages without the official API. You connect your existing number by scanning a QR code.

How it works:

1. Sign up and scan a QR code to link your WhatsApp number
2. Upload your contact list via CSV or sync via REST API
3. Create a broadcast campaign with personalized message variables
4. Send immediately or schedule, with automatic anti-ban throttling

Key advantages:

• Flat-rate pricing from $5/month (no per-message fees ever)
• Two-minute setup (no approval process required)
• Built-in smart throttling to protect your account's delivery rate
• REST API and webhooks for programmatic bulk sending

Best for: SMBs, agencies, and teams that need scalable automation at predictable costs.

How to Send Bulk WhatsApp Messages Step-by-Step (with Walytic)

If you want to go beyond the 256-contact broadcast limit and automate at scale, here's how to set up bulk WhatsApp messaging with Walytic in under 5 minutes:

Step 1: Create Your Account

Sign up at app.walytic.com. The 14-day free trial requires no credit card.

Step 2: Connect Your WhatsApp Number

Navigate to Devices → Add Device. Open WhatsApp on your phone, go to Settings → Linked Devices → Link a Device, and scan the QR code shown in your Walytic dashboard. Your number is connected in under 60 seconds.

Step 3: Import Your Contacts

Go to Contacts → Import. Upload a CSV file with columns for phone number, name, and any custom variables you want to use for personalization (such as order number, invoice amount, or appointment date). Walytic normalizes phone formats automatically.

Step 4: Create a Broadcast Campaign

Navigate to Campaigns → New Broadcast. Write your message using variables:

Hi {{contact_name}},

Your order #{{order_id}} has shipped! 🚚
Track it here: {{tracking_link}}

Questions? Reply to this message.

Step 5: Schedule or Send

Choose to send immediately or schedule for a specific date and time. Walytic's smart throttling automatically spaces messages to protect delivery rates . No manual delays needed.

Step 6: Monitor Results

View delivery rates, reply rates, and opt-outs in the real-time analytics dashboard. Use this data to optimize your next campaign.

Anti-Ban Best Practices for Bulk WhatsApp Messaging

WhatsApp actively monitors accounts for spam behavior. Breaking these rules can result in temporary restrictions or permanent bans:

With Walytic, throttling and spacing are handled automatically. You don't need to manage delays or timing manually.

Which Method Is Right for You?

Frequently Asked Questions

How many bulk messages can I send per day on WhatsApp?

With the official WhatsApp Business API, new accounts start at 1,000 conversations per day and can tier up to unlimited with good account standing. With linked device tools like Walytic, practical daily limits depend on account age. Starting conservatively at 100–300 messages per day and scaling up gradually is recommended.

Is sending bulk messages on WhatsApp legal?

Yes, with one key requirement: you must only message contacts who have opted in to receive your communications. Sending unsolicited bulk messages violates WhatsApp's Terms of Service and can result in account suspension, regardless of which tool you use.

Can I send bulk messages from the WhatsApp Business App?

The WhatsApp Business App supports broadcast lists of up to 256 contacts. For larger sends with automation, scheduling, and analytics, you need either the WhatsApp Business API or a third-party automation tool like Walytic.

Start Sending Bulk WhatsApp Messages Today

Whether you need to reach 100 or 100,000 contacts, the right method depends on your volume, budget, and technical resources. For most small and mid-sized businesses, a linked device tool offers the best combination of speed, cost, and built-in features. Without per-message fees or developer complexity.

Start your free 14-day trial at Walytic . No credit card required. Connect your WhatsApp number in 2 minutes and send your first bulk campaign today.