If you sell anything in India, you've probably wondered why some brands seem to have a magical line into their customers' WhatsApp inboxes — and yours doesn't. The short answer is the WhatsApp Business API. The longer answer is what this guide is for.
Read this end-to-end and you'll know what the API is, who needs it, how to apply, what it costs, and how to avoid the four most common pitfalls Indian operators run into.
What the WhatsApp Business API actually is
The free WhatsApp Business app on your phone is great for one shopkeeper or freelancer. It hits a wall fast: a 256-contact broadcast cap, single-device login, no automation, no integrations. The API removes those limits.
In one sentence: the API is the enterprise version of WhatsApp built for businesses that need to message at scale, automate conversations, and integrate the channel into their CRM, e-commerce, or support stack.
Who needs it
Brands with 1,000+ contacts they want to broadcast to
Teams running multiple agents on a single number
Businesses running automated flows (cart recovery, OTP, order updates)
Brands seeking the official
How to get it (in 10 minutes, free, with Sendvise)
Forget the agency middlemen quoting ₹15,000–25,000 setup. Through an Official Meta Business Solution Provider like Sendvise, you can apply directly. Here's the flow:
Submit your business details (legal name, GSTIN, website, the phone number you want).
Verify your Facebook Business Manager (one-time KYC).
Connect the number and set your verified display name.
Send your first broadcast (or wire up a chatbot).
End-to-end, technical access takes about 10 minutes. Display name approval takes 3–4 hours. Blue Tick application runs in parallel — typically 7–15 days.
How pricing works (and what you'll actually pay)
WhatsApp does not charge per message. It charges per conversation, defined as a 24-hour window from the first message you initiate. There are four categories:
Marketing — ₹0.98/message (promotions, broadcasts)
Utility — ₹0.17/message (order updates, alerts)
Authentication — ₹0.17/message (OTPs, login codes)
Service — free (any chat the customer initiated)
On top of Meta's conversation rates, you pay your BSP a platform fee. Sendvise's Starter plan is free; Growth is ₹999/month (or ₹833 billed annually). Setup fees should be zero — anyone charging more is overcharging you.
The four mistakes I keep seeing
1. Using unofficial 'WhatsApp blasters'
These are modded WhatsApp builds or Selenium automation kits. They violate Meta's TOS and almost always get the number permanently banned. The official API exists because Meta wants legit broadcasting — use it.
2. Sending without a template
Any outbound message after the 24-hour window needs a Meta-approved template. Most brands try to write a single template for everything; you should have 5–10 by use case (cart recovery, order confirmation, festive promo, payment reminder, etc.).
3. Treating WhatsApp like email
WhatsApp has 91%+ open rates because it's still respectful. Send 5 marketing messages a week and you'll watch your unsubscribes spike. Cap yourself at 1–2 marketing messages per contact per week, and use utility templates (which feel less promotional) for the rest.
4. Forgetting consent
Yes, you need explicit opt-in for marketing messages. Yes, the DPDP Act has teeth. Sendvise enforces consent state per contact automatically — but if you're DIY-ing it, build a consent table on day one.
The TL;DR
Start free, get on the official API in 10 minutes, design 5–10 templates by use case, and respect frequency caps. If you do this right, WhatsApp becomes the highest-ROI channel in your stack — almost always.
The brands that win on WhatsApp aren't the ones who broadcast the most. They're the ones who broadcast the least, but at exactly the right moment.
Put this guide to work