RCS and SMS both reach the native inbox, but RCS is the rich, branded, interactive upgrade while SMS is plain text with universal reach. RCS sends images, video, buttons, and verified branding over the internet and reports reads and clicks; SMS sends up to 160 characters of plain text over the cellular network to virtually any phone. The practical answer: use RCS where it’s supported for engagement and trust, and rely on SMS as the universal fallback.
You do not have to choose: SimplyRCS sends RCS with automatic SMS fallback from one campaign, at $0.0039 a text segment for either channel and $0.0150 a card or media message, with no monthly platform fee. See the rates, the platform, or try it free on your own phone.
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RCS vs SMS, line by line.
Every dimension, both sides. Search to jump to what matters, hover a row to focus it.
Images, video, carousels, buttons
Plain text (160 chars/segment)
Long text in one bubble, billed per 160-byte segment
160 characters per billed segment
Verified name, logo, checkmark
Anonymous number or short code
Internet (Wi-Fi / data)
Cellular network
Modern Android + iPhone (iOS 18.1+)
Virtually every mobile phone
Delivery, reads, clicks, replies
Delivery receipts only
Suggested replies and free text
Free text only
$0.0039 a text segment, $0.0150 a card or media
$0.0039 a segment
Engagement, branding, conversion
Universal reach, OTPs, fallback
What RCS vs SMS means on a text message
When a phone labels a conversation RCS, both phones have RCS switched on and a data connection, and the message travels over the internet. That thread gets read receipts, typing indicators, high-resolution photos and video, and it works over Wi-Fi with no cellular signal. When the label says SMS or Text Message, the message went over the cellular network as plain text, because the other phone does not have RCS, has it turned off, or had no data connection at that moment. Nothing is wrong in either case, and you do not choose between them: the messaging app uses RCS when it can and falls back to SMS when it cannot. What is RCS explains the upgrade, and how to turn RCS on and off covers the setting.
When RCS is the right choice
Reach for RCS when the message has to look like it came from you and do something. A verified sender name, logo, and checkmark sit at the top of the thread, so the customer knows who is writing before they read a word, and that identity is what makes an offer, an appointment change, or a delivery update credible enough to act on. RCS carries images, carousels, and tappable buttons, so “track my order”, “reschedule”, or “reorder” happens inside the thread instead of in a browser tab. It also reports back: delivery, reads, clicks, and replies, so you can see which message moved someone rather than infer it from a delivery receipt. For marketing, loyalty, appointment flows, and post-purchase updates, that combination is the whole argument.
When SMS is still the right call
SMS is the floor under every RCS program. It works on almost every handset, needs no data connection, and does not depend on a device setting or a carrier rollout, which keeps it the right channel for one-time passcodes, critical alerts, and anyone whose phone cannot receive RCS today. It is also simpler to operate: no brand verification, no agent, nothing to design. So the practical answer for a US program is not RCS or SMS, it is RCS with SMS underneath it. SimplyRCS picks per recipient at send time, so a modern Android or an iPhone on iOS 18.1 or later gets the branded, interactive version and everyone else gets the plain text, from one campaign and one list.
RCS vs SMS vs MMS
MMS is the third format in the same inbox. It carries a picture or a short video over the cellular network, compressed, with no read receipts and no buttons. RCS replaces both SMS and MMS wherever both phones support it, and SMS and MMS remain the fallback where they do not. On SimplyRCS an RCS rich card or media message is $0.0150, the same as MMS. RCS vs MMS has the side-by-side.
What the two cost
On SimplyRCS an RCS text and an SMS are the same price, $0.0039 a segment, the same rate inbound and outbound, and an RCS rich card or a message with images or video is $0.0150, the same as MMS. Carrier surcharges are passed through at cost on their own line: $0.0035 to $0.0050 a segment for SMS and $0.0045 to $0.0062 for an RCS text, depending on the carrier, so an RCS text costs a fraction of a cent more than the same SMS on most networks. The platform, builder, inbox, and API are free, with no monthly platform or agent fee; RCS Sender ID setup and review is a one-time $250 support service, waived with Premium Support, and the one-time carrier setup fees are itemized on the pricing page. Because RCS is priced like SMS but engages more like an app, the number that usually moves is cost per action, not cost per message.
RCS wins on experience, branding, and measurability. SMS wins on universal reach and simplicity, it works on every device with no data connection. That’s why a strong program is RCS-first with SMS fallback rather than one or the other.
- RCS reaches over 80% of smartphone users in the US, and Google reported more than 1 billion RCS messages a day in the US as of May 2025.
- Apple added RCS in iOS 18, so one RCS campaign now spans modern Android and iPhone.
- An RCS text and an SMS cost the same on SimplyRCS, $0.0039 a segment, so upgrading the experience does not raise the per-segment rate.
- Both channels require 10DLC registration for US business sending, and both must honor STOP. A longer, business-focused version of this comparison, with the decision framed around campaign type and budget rather than the specs, is in RCS vs SMS for business. For the per-message rate by class, see RCS message cost.
RCS vs SMS, common questions.
RCS messaging vs SMS: which should a business send first?
Send RCS first and let SMS carry the rest. In the SMS vs RCS messaging decision the deciding factor is the handset: SimplyRCS checks each recipient at send time, delivers the verified, branded RCS version where the phone supports it, and sends the same message as SMS everywhere else, at the same $0.0039 per segment for a text either way.
What is the difference between RCS and SMS?
SMS is plain text, capped near 160 characters, with no branding or interactivity. RCS adds a verified sender name and logo, images and carousels, tappable buttons, read receipts, and much longer messages, all in the same inbox.
Does RCS replace SMS?
It upgrades it. On phones that support RCS the customer sees the rich, branded version. On phones that do not, SimplyRCS sends SMS automatically, so every recipient gets the best experience their device allows.
Is RCS more expensive than SMS?
No. On SimplyRCS an RCS text and an SMS are both $0.0039 a segment, the same rate inbound and outbound, and an RCS rich card or media message is $0.0150, the same as MMS. Because branded, interactive messages drive higher engagement, the return per message sent is usually better.
When should I still use SMS instead of RCS?
For one-time passcodes, critical alerts, and any audience that has to be reachable on every handset regardless of device or data connection. SMS works on every phone ever sold, which is why it stays the fallback layer under an RCS program rather than something you retire.
Does RCS need 10DLC registration like SMS?
US business sending requires brand and campaign registration either way, and RCS additionally requires a verified RCS agent. SimplyRCS files both for you, so registration stays one process rather than two.
How do I know whether a customer received RCS or SMS?
Your reporting shows it per message. RCS returns delivery, read, click, and reply events; SMS returns a delivery receipt only. The same campaign can produce both, because the decision is made per recipient at send time.
Is RCS better than SMS?
For most messages, yes. RCS adds a verified sender, images, buttons, read receipts and click reporting that SMS cannot carry. SMS is still better at one thing, reaching every phone with no data connection, which is why it stays in place as the fallback and for one-time passcodes.
Why did my text change from RCS to SMS?
Because RCS could not be used at that moment. The usual causes are no data connection on either phone, the other person moving to a phone or app without RCS, or RCS being turned off. The messaging app falls back to SMS so the message still arrives, and uses RCS again when both phones can.
Compare RCS with another channel.
Nine head-to-heads, including the one you are reading.