Receiving an SMS message can feel just like getting an MMS. But there are differences: SMS, or Short Message Service, sends plain text up to 160 characters. MMS, or Multimedia Messaging Service, supports images, videos, audio, and longer text up to 1,600 characters. SMS is cheaper and more universally compatible; MMS gets higher engagement for visual content. Most business texting platforms send both automatically based on message content.
If you’re using text messaging for business, this article will dive into when to use SMS vs MMS.
What’s the difference between SMS vs MMS?
The main difference between SMS and MMS is message content and length. SMS has a 160 character limit and is best for simple texts like appointment reminders. MMS (Multimedia Messaging Service) supports sending images, audio clips, videos, and rich text up to 1,600 characters.
What is SMS?
SMS caps at 160 characters of plain text. When you get an appointment confirmation text from your dentist or an “I love you” text from your mom, you’re likely getting an SMS.
It works on virtually every phone and lets you send text messages without a data connection. This makes it the default for most transactional and conversational messages businesses send.
What is MMS?
MMS supports images, video, and audio alongside text up to 1,600 characters. That’s why it’s the go-to for real estate listings, contractor before/after photos, and visual marketing campaigns. Larger files can affect delivery, so it’s worth knowing common MMS delivery issues before building campaigns around it.
With most phone carriers, MMS requires a cellular data connection. But with VoIP phones, you can send MMS with any internet connection, including WiFi.
Understanding other key differences between SMS vs MMS
To help you further understand the difference between SMS and MMS, we’ll go into detail about the distinct qualities of each type of text. We’ll also compare SMS vs. MMS in terms of deliverability and pricing.
| Feature | SMS | MMS | RCS |
|---|---|---|---|
| Character limit | 160 characters max | 1,600 characters max | No practical limit (8,000+) |
| Message content supported | Plain text only (images, videos, etc. appear as a link) | Images, video, audio, GIFs | Rich media, high-res images, read receipts, typing indicators |
| Cost | Between $0.01 and $0.05 per message (source) | Between $0.04 and $0.20 per message (source) | Varies by provider, typically higher than SMS |
| Device compatibility | All cellular phones | Only phones with internet connectivity, like smartphones | iOS 18+ and Android 5.0+ with an RCS-enabled carrier |
| Group messaging | Sends as separate individual texts | Shared group thread | Full group chat with online status, typing indicators, read receipts, last seen |
| Deliverability | Higher — works on every device | Slightly lower — requires data connection | Lowest reliability today, falls back to SMS if unsupported |
Character limits
SMS messages are limited to 160 characters, which might drop to 70 if you include special characters or emojis. Go over 160 and your message splits into fragments that can arrive out of order.
For short transactional messages like appointment reminders or order confirmations, that limit is rarely a problem. For anything longer, MMS’s 1,600-character ceiling gives you room to actually say something.
Supported content types
With SMS, any image or video has to go out as a link, which kills engagement for visual content.
MMS sends files, videos, and audio files directly. For example, if you’re a real estate agent needing to send PDFs for property listings, MMS is better. If you’re a retailer running a promotional campaign, MMS lets you send images for coupons.
Cost
SMS is usually cheaper than MMS. Since multimedia messages involve more data, each text will cost more. Though the difference is only a matter of 1-2 cents, this can add up if you use MMS for lots of text marketing campaigns or customer support.
The good news: most phone carriers offer SMS and MMS plans for US texts. With Quo’s VoIP system, you get free SMS and MMS for the US and Canada along with calling on every plan.
Deliverability
SMS reaches virtually every phone. MMS requires a data connection and doesn’t work on basic or older devices — roughly 10% of US adults still don’t own a smartphone. For high-volume campaigns where reach matters more than visuals, SMS is the safer bet.
If you’re sending group texts, MMS offers a better delivery experience than SMS. Sending group texts via MMS allows the entire group to seamlessly chat in one conversation — for example, if you’re collaborating with your team. With SMS, sending a text to multiple people at once is more like BCC’ing people on an email. Your message will simply be sent as individual texts to each person.
When to use SMS messages
Due to its simplicity and consistent deliverability, SMS is a great choice when you want to send texts like:
- Time-sensitive alerts
- Appointment reminders
- Policy change notifications
- Company updates
- Delivery updates
- Order confirmations
- General customer support responses
- Quick follow-up messages
SMS gets messages across fast, which is what you want for important or transactional texts. For example, a dentist’s office doesn’t need to send an image to confirm a Tuesday cleaning — they need the message to land, quickly, on every phone.
SMS also works well for automating SMS and MMS messages like reminder sequences, where you’re sending the same short message to hundreds of people and cost per message adds up quickly. Scheduling text messages for timed sends — a reminder 24 hours before an appointment, a follow-up two days after a purchase — via SMS keeps costs low without sacrificing reliability.
When to use MMS messages
When you need to send group texts or lengthy messages, MMS is the clear winner. MMS is also a great option for conversations that can benefit from visual contexts, like:
- Messaging customers video walkthroughs of a property listing
- Troubleshooting support issues by requesting screenshots
- Sending a potential customer a service job quote broken down by line items
- Providing a photo of an alternate item if a customer orders something out of stock
- Before/after photos of a job or service
- Product images for promotions and announcements
One thing to keep in mind: MMS marketing campaigns fall under the same compliance requirements as SMS. Opt-in consent is required regardless of message type, and MMS can attract more carrier scrutiny because of file size.
Don’t choose between SMS vs MMS: Access the best of both worlds
Most business texting platforms, including Quo, handle SMS and MMS from the same inbox. So in practice you’re rarely choosing one over the other permanently.
If you’re ready to put both to use, here’s how to get a business text number.
FAQs
RCS, or Rich Communication Services, adds features like read receipts, typing indicators, high-res media, and group chats to your phone’s native messaging app. Unlike SMS and MMS, RCS runs over the internet.
It’s now available on iOS 18 and Android 5.0+, but if either party doesn’t support it, messages fall back to SMS. For businesses, SMS and MMS are still the more reliable choice for customer communication since RCS adoption is still inconsistent across carriers and devices. For a full breakdown, read about all the types of text messages.
Both SMS and MMS fall under TCPA regulations and require opt-in consent for marketing messages. In practice, MMS triggers more carrier scrutiny because larger files mean higher spam potential. A2P 10DLC registration, which is required for businesses texting US phone numbers, covers both message types. For full compliance guidance including TCPA requirements and A2P registration, see our guide to SMS compliance.
Android uses SMS for text-only messages and MMS for multimedia messages.
iPhone uses SMS for text-only and MMS for multimedia, unless using iMessage between Apple devices, which uses the internet to send messages.
You can tell if you’re using SMS or MMS based on whether the message contains only text (SMS) or includes multimedia (MMS). MMS messages include images, videos, emojis, GIFs, and more.
Not all phones can receive MMS messages, especially older models or those without data capabilities.
SMS is a carrier-based service, while apps like iMessage or WhatsApp are Over-The-Top (OTT) applications that rely on the internet for messaging.
