India's most reliable bulk SMS & WhatsApp infrastructure. Direct SMPP connectivity, 95% OTP accuracy, and a dashboard your team will actually enjoy using.
Trusted across industries
From promotional blasts to mission-critical OTPs — we run the full communication stack for modern Indian businesses.
Mass campaigns with rich sender IDs and real-time delivery reports.
Learn more → 0295% accuracy. Sub-second routing through dedicated priority lanes.
Learn more → 03Order alerts, bank notifications. DND-compliant, always on.
Learn more → 04Global reach across 190+ countries with competitive pricing.
Learn more → 05Pre-recorded voice broadcasts for announcements at scale.
Learn more → 06Intelligent call routing. Available 24/7 without extra headcount.
Learn more → 07Official Business API. Rich media, quick replies, flows & catalogues.
Learn more → 08Frictionless lead generation. Zero cost for your end users.
Learn more →Parallel routing across Airtel, Vodafone & BSNL gateways. Nothing degrades when you push a million messages at once.
Campaigns fan out across direct telco routes simultaneously. Real-time route health, automatic failover, zero babysitting.
SDKs for PHP, Java, Python & Node. Clear docs, rock-solid endpoint, ultra-high throughput for enterprise use.
# send an OTP curl -X POST api.whybulksms.com/v1/send \ -H "Authorization: Bearer $KEY" \ -d "to=9198XXXXXXXX" \ -d "sender=WBSOTP" \ -d "text=Your OTP is 4471"
Shorten, track and attribute each link. Conversion funnels in real time.
White-label sub-accounts, margin controls and billing — all under your own domain.
Approved headers, templates and scrubbing built in.
Sign up, get free test credits instantly. No credit card, no paperwork to start.
We handle DLT header and template approval with the operators for you.
Excel upload, dashboard composer or API. Watch delivery reports come in live.
Unlimited validity on every plan. Credits never expire.
Need more volume or WhatsApp API pricing? Get a custom quote →
Switched from two other providers. OTP delivery is near-instant and uptime is genuinely impressive. Our checkout auth failures dropped 60%.
The reseller panel is clean, margins are good, and support actually responds. Running 30+ client accounts through it with zero issues.
API integration took under an hour. Docs are clear, endpoint is rock-solid, and the team helped us configure SMPP for high volume.
TRAI authorised. Direct telco routes. Zero setup fees. Your first campaign goes out in under five minutes.