Official Bulk Messaging at Scale
Blast high-volume notifications to opted-in audiences. Run on official Meta daily limit tiers from 1,000 to unlimited messages without risk of number blocking. Equipped with built-in queue throttling and SMS fallback.
✦ No credit card required · Free plan available · Setup in 5 minutes
Zero-Ban Risk Enterprise Throughput
Unlike unofficial browser-scraping tools that immediately trigger WhatsApp spam blocks, StartMessaging works directly with Meta's official Cloud API. You can safely send thousands of transactions simultaneously, backed by our smart scheduling engine that queues messages to match your account's quality rating.
- Supports Meta Tier 1 (1k/day) to Tier 4 (Unlimited/day)
- Automated fallback to DLT-compliant SMS when receiver lacks internet
- Comprehensive webhook tracking for delivery and read statistics
Engineered for Enterprise Performance
-
Load Balancing
Distribute broadcast traffic across multiple verified sender numbers to maximize outbound throughput.
-
Compliance Guards
Automatic unsubscribe opt-out link parsing to keep user report rates low and maintain number quality.
-
Smart Queueing
Throttles outgoing messages during peak traffic to maintain high delivery success ratios without server lag.
-
Visual Media Delivery
Include personalized image/video files, dynamic PDF receipt attachments, and quick-reply buttons.
Official Bulk API vs. Unofficial Broadcasters vs. Traditional SMS Blasts
Compare features, ban rates, and delivery speeds to make the optimal decision for your enterprise scale.
| Comparison Point | StartMessaging Bulk API | Unofficial Scraping Apps | Traditional SMS Blasts |
|---|---|---|---|
| Account Ban Risk | 0% (Fully TRAI/Meta Compliant) | 99% (Highly vulnerable to bans) | 0% (Carrier regulated) |
| Delivery Speeds | Up to 250 messages/second | Throttled to 1-2 per minute | Slow network spikes |
| Interactive Rich Media | ✓ (Images, Videos, Buttons) | ✓ (Prone to flagging) | ✗ (Text only / MMS cost-prohibitive) |
| Detailed Open Tracking | ✓ (Delivery & Read receipts) | ✗ (Manual log checks) | ✗ (No open indicators) |
Trigger a Bulk Dispatch Programmatically
curl -X POST https://api.startmessaging.com/v1/bulk-messages \
-H "Content-Type: application/json" \
-H "X-API-Key: sm_live_your_api_key_here" \
-d '{
"campaign_name": "holiday_promo_2026",
"template_name": "festive_offer",
"recipients": [
{ "phone": "+919876543210", "vars": {"name": "Amit", "code": "FEST20"} },
{ "phone": "+918765432109", "vars": {"name": "Pooja", "code": "FEST25"} }
]
}'const response = await fetch("https://api.startmessaging.com/v1/bulk-messages", {
method: "POST",
headers: {
"Content-Type": "application/json",
"X-API-Key": "sm_live_your_api_key_here"
},
body: JSON.stringify({
campaign_name: "holiday_promo_2026",
template_name: "festive_offer",
recipients: [
{ phone: "+919876543210", vars: { name: "Amit", code: "FEST20" } },
{ phone: "+918765432109", vars: { name: "Pooja", code: "FEST25" } }
]
})
});import requests
res = requests.post(
"https://api.startmessaging.com/v1/bulk-messages",
headers={
"Content-Type": "application/json",
"X-API-Key": "sm_live_your_api_key_here"
},
json={
"campaign_name": "holiday_promo_2026",
"template_name": "festive_offer",
"recipients": [
{ "phone": "+919876543210", "vars": {"name": "Amit", "code": "FEST20"} },
{ "phone": "+918765432109", "vars": {"name": "Pooja", "code": "FEST25"} }
]
}
)Bulk Sending — Frequently Asked Questions
What is the daily sending limit on official WhatsApp Bulk API?
Meta assigns numbers to tiers starting at Tier 1 (1,000 unique recipients/24h), moving to Tier 2 (10,000), Tier 3 (100,000), and Tier 4 (unlimited). Your tier automatically upgrades based on sending volume and number quality score.
How do you protect the phone number from being banned?
Because we use official WhatsApp Cloud API, you are completely compliant. However, if customers actively block or report your messages, your number score decreases. We recommend sending exclusively to opted-in clients, personalized templates, and offering a quick 'Stop' button.
Does StartMessaging support local bank/fintech transactional bulk rules in Nigeria?
Yes, we fully support CBN and local fintech transaction alert patterns. With optimized routing for low-bandwidth connections and instant SMS fallback, you are guaranteed that high-volume bank notifications reach customers even in areas with spotty network coverage.
Ready for Enterprise Bulk Sending?
Get sandbox access and begin integrating within minutes.