WhatsApp vs RCS: Which Channel to Use, and When

The quick difference

WhatsApp Business API messages arrive inside WhatsApp, an app nearly everyone in India already uses for chatting. RCS Business Messaging arrives inside the phone's default messages app, mostly Google Messages on Android, and looks like a richer, branded version of SMS. Both can carry images, videos, buttons and a verified business name. The real differences are in reach, consent, cost and what each is best at.

Side by side

Where the message shows up

• WhatsApp: in the WhatsApp app, next to family and friends' chats.
• RCS: in the default messages app on supported Android phones, where OTPs and SMS also arrive. Support on other phones depends on device and carrier.

Who you can message

• WhatsApp: people who have given you consent, using Meta-approved templates for business-started messages.
• RCS: people on RCS-capable phones, which in our campaigns is also useful for reaching DND or failed numbers where other channels did not land.

What it is best at

• WhatsApp: two-way chat, chatbots, shared team inbox, forms, payment links, ongoing updates and support.
• RCS: eye-catching one-way promotions such as carousels of up to 10 image or video cards, with buttons to call, visit a link or reply.

Cost

Both are paid per message, and rates vary by message type and provider. As an example used in our campaign planning, RCS has been around ₹0.19 per message and a WhatsApp marketing message around ₹0.89, before GST. These are example rates only; your quote may differ. Check our pricing page for current plans.

When to choose WhatsApp

• You want people to reply, ask questions and book or pay inside the chat.
• You are sending ongoing updates such as fee reminders, appointment confirmations or order status.
• You need a team inbox where staff can pick up conversations.

When to choose RCS

• You want a rich, branded promotion to reach a wide Android audience at a lower per-message cost.
• You want to show several courses, packages or products as a swipeable carousel.
• You want a fallback for numbers where WhatsApp or voice did not get through.

Using both in one campaign

The most efficient setup is often not "WhatsApp or RCS" but "which one for whom". In the Smart Growth AI Campaign, a short voice call goes to the full list first. People who listen 10 to 25 seconds are treated as partially interested and get an RCS carousel with up to 10 videos. People who listen past 25 seconds are treated as highly interested and get a WhatsApp template with course videos and details. DND or failed numbers get an RCS attempt, and anything still undelivered gets an SMS.

In our 3 lakh student worked example, sending only the right channel to the right group brought the illustrative total down from ₹2,47,210 to ₹1,00,501 including GST, a saving of about 59% on that example. Your actual numbers will depend on your list and rates.

Common mistakes

Sending the same promotion on both channels to the same person is the most common one; it costs twice and annoys people. Another is using WhatsApp marketing templates for cold lists, which can hurt your quality rating. A third is treating RCS as guaranteed reach; plan an SMS fallback for phones it does not support.

Use RCS to spark interest widely. Use WhatsApp to continue the conversation with people who showed interest. Learn more about each on our RCS Business Messaging and Official WhatsApp Business API pages.