Key points
- RCS adds branding, media, rich cards and tappable actions; SMS is plain text.
- SMS reaches almost every phone; RCS reaches only capable, enabled devices on launched carriers.
- The RCS standard can report richer events, such as read and tap events, where the device reports them.
- Short RCS text can be billed as a lower-cost Basic Message on carriers that offer it.
- A combined approach sends RCS first and falls back to SMS when needed.
The short answer
Use RCS when the message benefits from visuals, a recognisable brand identity or a one-tap next step — product offers, appointment management, order tracking. Use SMS when you need the widest possible reach for simple text, or as a fallback for customers RCS cannot reach.
Side-by-side comparison
| Aspect | RCS Business Messaging | SMS |
|---|---|---|
| Content | Text up to 3,072 characters, images, video, PDF, rich cards and carousels | Plain text; long messages are split into parts |
| Interaction | Suggested replies and one-tap actions (call, open URL, location, calendar) | Customer types a reply or taps a link in the text |
| Sender identity | Agent with brand name, logo and verification mark after brand verification | Sender ID (header) without a logo |
| Reach | Only RCS-capable apps with RCS enabled, on carriers where the agent is launched | Practically every mobile phone |
| Reporting | Delivery, read, reply and tap events where the device reports them | Delivery reports where the network provides them |
| Setup | Agent creation, brand verification and launch approval by Google and carriers; in India, an active DLT registration for headers and templates | In India, DLT registration of the sender header and message templates |
| Cost factors | Message type and length, traffic category, conversation pattern, volume | Number of message parts, route and traffic category, volume |
When RCS is the better choice
- You want customers to act inside the message — confirm, reschedule, track, call or open a specific page.
- Trust matters. A verified brand profile helps customers recognise genuine messages from your business.
- Visuals sell the message. Product ranges, property listings or courses work well as cards and carousels.
- You need engagement data. Read and tap events show which messages lead to action.
When SMS is still the right tool
- The audience includes many phones or networks without RCS support.
- The message is a simple, time-critical alert where reach matters more than presentation.
- As the fallback route when an RCS message isn't delivered in time.
Understanding the cost difference
Comparing a per-message RCS rate with a per-SMS rate is not always like for like. Carriers have introduced billing models for RCS where a text-only message of up to 160 UTF-8 characters is treated as a Basic Message, while rich content and longer text are billed differently. Emoji and non-Latin scripts use more than one byte per character, so a short message in Telugu or Hindi may exceed the Basic Message limit sooner than you expect.
On the SMS side, longer texts are split into multiple billable parts. When comparing quotes, ask for:
- The rate for each RCS message type you plan to send, and for SMS fallback.
- Whether undelivered or expired messages are charged.
- How delivery reports reconcile with the invoice.
Our pricing page lists our RCS message pack rates.
Using both together
A common pattern is RCS first, SMS fallback: send over RCS where the customer can receive it, and send a shorter SMS version when RCS is unavailable or the message isn't delivered in time. Doing this well means setting expiry times, revoking the RCS message before sending the SMS, and preventing duplicates. It's covered step by step in Understanding delivery reports and SMS fallback.
Remember that SMS fallback is still SMS: in India, commercial SMS requires a registered sender header and registered templates on a DLT platform under TRAI regulations, so the fallback text must match an approved template.