Marketing & Promotions: The Right Channel for Every Campaign
Promotional campaign ROI depends less on which channel you default to and more on matching the channel to the audience and content type- see how WhatsApp, RCS, SMS, and Voice Broadcast each pull ahead on reach, engagement, and attention for different kinds of campaigns.
Trusted by 10,000+ businesses across India
Trusted by 10,000+ businesses across India
WhatsApp Marketing, in One Paragraph
The WhatsApp Business API sends rich, catalog-style promotional messages- images, carousels, and CTA buttons- into a chat interface customers already use daily. What makes it distinct for marketing specifically is the opt-in requirement. An explicit checkbox, keyword, or QR-code opt-in is required before the first marketing template can be sent. Meta also enforces strict opt-out compliance that affects your sending quality rating.
RCS Marketing, in One Paragraph
RCS Business Messaging sends the same kind of rich cards, carousels, and CTA buttons as WhatsApp, natively inside Google Messages on Android. What makes it distinct for marketing is the opt-in rule. Unlike WhatsApp, RCS doesn't require an explicit opt-in step within Google's content guidelines. That means a promotional campaign can reach a Google-verified, branded inbox without that upfront friction.
Bulk SMS Marketing, in One Paragraph
Bulk SMS carries plain-text promotional content to any mobile number over the cellular network. No app, internet, or opt-in checkbox is required for the message to be technically deliverable. What makes it distinct for marketing is that the promotional route is filtered by TRAI's DND registry. A number registered against promotional content simply won't receive it, which is a different mechanism from WhatsApp's or RCS's opt-in rules entirely.
Voice Broadcast Marketing, in One Paragraph
Voice Broadcast (OBD) places an automated call to a list of numbers and plays the same pre-recorded promotional message to every recipient, with an optional "press 1" response element. What makes it distinct for marketing is that it's typically run as a consent-based, opt-in channel like SMS and WhatsApp, with TRAI/RTM telemarketer registration applying to promotional campaigns. It earns its higher cost by being genuinely hard to ignore.
Four Channels, Compared for Marketing
The same four channels look different once you narrow the lens to promotional campaigns specifically- opt-in rules, DND applicability, and cost per send at marketing-tier pricing all shift the calculus.
| Feature | Bulk SMS | RCS | Voice Broadcast | |
|---|---|---|---|---|
| Opt-In Requirement | Not required for the promotional route itself, but DND-filtered | ✅ Explicit opt-in required before any marketing template | Not required within Google's RCS content guidelines | Consent-based- promotional voice broadcast expects opt-in |
| Rich Media / CTA Support | ❌ Links only | ✅ Images, carousels, CTA buttons | ✅ Native rich cards, carousels, buttons | ❌ Audio only- optional press-1 IVR response |
| Verified Branding | ❌ Sender ID only | ✅ Green Tick (hard to obtain) | ✅ Google-verified badge | Caller ID only- no platform verification badge |
| DND / Regulatory Applicability | ✅ Promotional route filtered by TRAI's DND registry | Not DND-linked- governed by Meta opt-in & quality rating | Not DND-linked- governed by Google content guidelines | TRAI/RTM telemarketer registration applies to promo campaigns |
| Cost Per Send (Marketing Tier) | ~₹0.09-0.18 / SMS | ~₹0.79-0.91 / conversation | ~₹0.15-0.25 / message | ~₹0.28-0.48 / call |
| Best-For Campaign Type | Mass discount/sale blasts at the lowest cost per reach | Rich catalog showcases & retargeting an engaged audience | Branded rich-card promos at Android scale, no opt-in gate | Must-hear announcements- events, festivals, limited-time offers |
Opt-In Requirement
- Bulk SMS
- Not required for the promotional route itself, but DND-filtered
- ✅ Explicit opt-in required before any marketing template
- RCS
- Not required within Google's RCS content guidelines
- Voice Broadcast
- Consent-based- promotional voice broadcast expects opt-in
Rich Media / CTA Support
- Bulk SMS
- ❌ Links only
- ✅ Images, carousels, CTA buttons
- RCS
- ✅ Native rich cards, carousels, buttons
- Voice Broadcast
- ❌ Audio only- optional press-1 IVR response
Verified Branding
- Bulk SMS
- ❌ Sender ID only
- ✅ Green Tick (hard to obtain)
- RCS
- ✅ Google-verified badge
- Voice Broadcast
- Caller ID only- no platform verification badge
DND / Regulatory Applicability
- Bulk SMS
- ✅ Promotional route filtered by TRAI's DND registry
- Not DND-linked- governed by Meta opt-in & quality rating
- RCS
- Not DND-linked- governed by Google content guidelines
- Voice Broadcast
- TRAI/RTM telemarketer registration applies to promo campaigns
Cost Per Send (Marketing Tier)
- Bulk SMS
- ~₹0.09-0.18 / SMS
- ~₹0.79-0.91 / conversation
- RCS
- ~₹0.15-0.25 / message
- Voice Broadcast
- ~₹0.28-0.48 / call
Best-For Campaign Type
- Bulk SMS
- Mass discount/sale blasts at the lowest cost per reach
- Rich catalog showcases & retargeting an engaged audience
- RCS
- Branded rich-card promos at Android scale, no opt-in gate
- Voice Broadcast
- Must-hear announcements- events, festivals, limited-time offers
Marketing-Tier Pricing Across All Four Channels
Cost per send only tells half the story- what matters for campaign ROI is cost per reach, and reach means something different on each channel. Bulk SMS marketing starts from approximately ₹0.09-0.18 per SMS, the lowest cost per reach of the four, ideal for high-volume mass announcements. RCS Marketing runs roughly ₹0.15-0.25 per message, adding rich cards and verified branding at a modest premium over SMS. WhatsApp Marketing is billed per conversation, around ₹0.79-0.91 per conversation, which pays for itself when a single conversation covers multiple follow-up messages to an engaged customer. Voice Broadcast costs the most per send, roughly ₹0.28-0.48 per call, but that cost buys near-certain attention rather than just delivery. At high volumes, the cheaper channels (SMS, RCS) compound their cost advantage across the full list; at smaller, targeted volumes, the ROI case for WhatsApp or Voice Broadcast strengthens because the fixed cost of richer engagement or higher attention is spread over fewer, more valuable contacts. See our Bulk SMS Pricing India and Voice Broadcast Pricing India pages for current rate cards before budgeting a campaign.
Reach and ROI Aren't the Same Thing
SMS has the widest raw reach at the lowest cost. WhatsApp and RCS have narrower but higher-engagement reach with richer content. Voice Broadcast has the highest cost but the highest attention-capture for promotions that genuinely need to be heard.
| Channel | Role | Why |
|---|---|---|
| Bulk SMS | Reach Leader | Widest raw reach at the lowest cost per send- every mobile phone, no app or opt-in gate for the message to land. |
| WhatsApp & RCS | Engagement Leader | Narrower reach than SMS, but rich media, carousels, and CTA buttons drive higher engagement per message sent. |
| Voice Broadcast | Attention Leader | Highest cost per send, but the highest attention-capture- a call is heard, not scrolled past, making it the pick for must-hear promotions. |
Bulk SMS
- Role
- Reach Leader
- Why
- Widest raw reach at the lowest cost per send- every mobile phone, no app or opt-in gate for the message to land.
WhatsApp & RCS
- Role
- Engagement Leader
- Why
- Narrower reach than SMS, but rich media, carousels, and CTA buttons drive higher engagement per message sent.
Voice Broadcast
- Role
- Attention Leader
- Why
- Highest cost per send, but the highest attention-capture- a call is heard, not scrolled past, making it the pick for must-hear promotions.
SMS: Reach Leader
From ~₹0.09-0.18 per SMS, bulk SMS reaches every mobile number in your list regardless of smartphone, app, or internet access- the widest funnel for mass discount and sale announcements.
WhatsApp & RCS: Engagement Leaders
Rich cards, carousels, and tappable CTAs turn a promotional message into a browsable catalog- narrower reach than SMS, but a customer who opens it engages far deeper.
Voice Broadcast: Attention Leader
At ~₹0.28-0.48 per call, voice broadcast costs the most per send, but a ringing phone commands attention text can't- best reserved for announcements that genuinely need to be heard.
A Campaign-Type Recommendation Matrix
| Campaign Type | Recommended Channel(s) | Why |
|---|---|---|
| Mass discount / sale announcement | SMS + RCS at scale | Lowest cost per reach, DND-compliant on the SMS side, and delivered regardless of device or app. |
| Rich product showcase / catalog | WhatsApp + RCS | Native carousels, images, and CTA buttons let customers browse a catalog inside the message itself. |
| Event / festival announcement that needs to be heard | Voice Broadcast | Certainty the message was heard, not just delivered- suited to time-critical or unmissable news. |
| Retargeting an already-engaged audience | The deepest engagement medium for customers who already have the app active and have opted in. |
Mass discount / sale announcement
- Recommended Channel(s)
- SMS + RCS at scale
- Why
- Lowest cost per reach, DND-compliant on the SMS side, and delivered regardless of device or app.
Rich product showcase / catalog
- Recommended Channel(s)
- WhatsApp + RCS
- Why
- Native carousels, images, and CTA buttons let customers browse a catalog inside the message itself.
Event / festival announcement that needs to be heard
- Recommended Channel(s)
- Voice Broadcast
- Why
- Certainty the message was heard, not just delivered- suited to time-critical or unmissable news.
Retargeting an already-engaged audience
- Recommended Channel(s)
- Why
- The deepest engagement medium for customers who already have the app active and have opted in.
Most campaigns aren't single-channel in practice- a launch might use SMS or RCS for the mass announcement, WhatsApp for a follow-up catalog to engaged customers, and Voice Broadcast for a final reminder ahead of a deadline.
One Platform for Every Promotional Channel
Trusted by 10,000+ businesses across India for campaign infrastructure that doesn't force a single-channel choice.
One dashboard for all four channels
Manage WhatsApp, RCS, SMS, and Voice Broadcast campaigns from a single unified dashboard instead of four separate vendor logins.
A/B testing & cross-channel reporting
Test creative and offers across channels and see delivery, engagement, and cost side by side in one report, not four.
Compliance handled end-to-end
DLT registration for SMS, Meta template approval for WhatsApp, Google RCS brand verification, and TRAI/RTM telemarketer registration for voice- all managed as part of onboarding.
Volume-based pricing that scales down
Per-send cost drops automatically as your campaign volume grows, across all four channels, so scaling a promotion doesn't scale your rate card.
Not sure which channel fits your next campaign?
Talk to our experts about running WhatsApp, RCS, SMS, and Voice Broadcast together, with unified reporting and one integration.
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Marketing & Promotions FAQs
There's no single winner. It depends on what you're optimizing for. Bulk SMS delivers the lowest cost per reach, making it the best ROI channel for mass discount or sale announcements at volume. WhatsApp and RCS cost more per send but drive higher engagement through rich media, making them a better ROI pick for catalog showcases and retargeting. Voice Broadcast costs the most per send but wins on attention-capture for must-hear announcements. The right channel is the one matched to your campaign type, not the cheapest one in isolation.
No, these two work very differently. WhatsApp Business API requires an explicit opt-in (checkbox, keyword, or QR code) before a business can send a marketing template message. RCS does not require that same opt-in step. It can send promotional rich cards within Google's RCS Business Messaging content guidelines without a prior opt-in thread. This is one of the sharpest differences between the two richest channels.
For most routine promotions, no. SMS or RCS will reach the same audience at a fraction of the per-send cost. Voice Broadcast earns its ~₹0.28-0.48 per call price for a narrower set of campaigns, such as event and festival announcements, limited-time offers, or any promotion where certainty the message was heard matters more than cost. Used selectively for those moments rather than as a default channel, it delivers strong ROI.
Yes, this is how most Get Click Media clients run promotional campaigns. A single campaign might use SMS or RCS for the mass announcement, WhatsApp for a follow-up rich catalog to customers who engaged, and Voice Broadcast for a final reminder ahead of a deadline. All of this is coordinated from one dashboard with unified reporting across the four channels.
We look at your campaign type, audience size, budget, and how time-sensitive the message is, then recommend a mix across bulk SMS, WhatsApp, RCS, and Voice Broadcast. We also handle DLT registration, Meta template approval, RCS brand verification, and TRAI/RTM telemarketer registration. All four channels run under one account and one integration.
Yes, the promotional SMS route is filtered by TRAI's DND (Do Not Disturb) registry, so numbers registered against promotional content won't receive it. This doesn't apply to WhatsApp or RCS, which are governed by their own opt-in and content-guideline rules rather than DND. It's also a separate mechanism from the TRAI/RTM telemarketer registration that applies to promotional voice broadcast campaigns.
Bulk SMS, starting from approximately ₹0.09-0.18 per SMS at marketing-tier pricing, is typically the cheapest way to announce a mass discount or sale to a large list. RCS follows at roughly ₹0.15-0.25 per message with the advantage of native rich cards and verified branding. WhatsApp (~₹0.79-0.91 per conversation) and Voice Broadcast (~₹0.28-0.48 per call) cost more per send. Both are better suited to smaller, more targeted segments of the same campaign.
Ready to run a cross-channel promotional campaign?
Get Click Media runs WhatsApp, RCS, SMS, and Voice Broadcast on one platform- request a demo and we'll map out the right mix for your campaign.