SMS vs. MMS Messages

Last updated: February 4, 2026

If you're sending marketing messages through OneText, you've likely seen options for both SMS and MMS. While they may seem similar, the two formats differ in how they're delivered, priced, and consumed—and that has a direct impact on performance and ROI.

Here’s what you need to know:

  • SMS (Short Message Service) is the standard text format—plain text, no media.

  • MMS (Multimedia Messaging Service) supports images, gifs, contact cards, and longer character counts. It delivers a richer experience but comes at a higher cost.

Feature

SMS

MMS

Message Type

Text only (including emojis)

Text + media (image, gif, contact cards, video, audio)

Character Limit

160 characters per segment

~1,600 characters

Delivery Speed

Fast

Slightly slower

Cost

Lower (charged per 160-character segment)

Higher (charged as one MMS message)

Best For

- Urgent updates
- Flash sales
- Transactional

- Product launches
- Branded promos
- Visual stories

Billing

Charged per segment (e.g., 2–3x for longer messages)

Charged as one message, regardless of character count. MMS are usually billed at a 3-4 unit multiplier, so please check your plan to see the cost for your MMS messages.

ROI Tip

Keep it short, lead with value

Use eye-catching visuals with concise, clear copy and engaged segmentation

Screenshot 2025-04-12 at 12.54.47 PM.png
The OneText dashboard features a built-in character and cost calculator on every message

How to Get the Best ROI from Each

For SMS:

  • Keep your copy concise and clear—focus on a single CTA

  • Send during optimal time windows (and respect quiet hours)

  • Use emojis sparingly (or not at all)

If your message is longer than 320 characters, convert it to an MMS by adding an image—this is more cost-effective because of the longer character allowance of MMS.

For MMS:

  • Use high-quality visuals that load quickly and look great on mobile

  • Pair images with minimal, clear copy and a strong CTA

  • Reserve MMS for high-impact campaigns (launches, VIP offers, major promos)

SMS is ideal for speed and scale. MMS is ideal for branded storytelling and visual impact. Both can drive results—just choose the right format based on the message, the moment, and the margin. If you're ever unsure, A/B test both formats and compare performance.

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