MMS marketing is a form of mobile marketing where businesses send multimedia messages (images, GIFs, videos, or audio) directly to customers’ phones. Unlike standard SMS texts that are limited to 160 characters of plain text, MMS messages can include rich media and up to 1,600 characters, making them a more visual and engaging way to promote products, share announcements, or drive sales.
How MMS Differs From SMS
Both SMS and MMS travel over cellular networks and land in the same messaging app on a customer’s phone. The difference is what they can carry. SMS is text-only (though it can include a link). MMS supports images, GIFs, short video clips, audio files, and PDFs, all within a single message. That visual element is the core appeal for marketers: instead of describing a new product in 160 characters, you can show it.
MMS also gives you significantly more text space. Where SMS caps out at 160 characters per segment, MMS allows up to 1,600 characters alongside your media. That’s enough room to pair an eye-catching product photo with a full promotional message, a discount code, and a link to your store.
The tradeoff is cost. MMS messages are more expensive to send than SMS because they carry more data. Most text marketing platforms charge roughly two to three times more per MMS than per SMS, and mobile carriers add small per-message surcharges on top of the platform’s base price. Those surcharges vary by carrier and the type of number you send from (short code, toll-free, or standard 10-digit number).
What You Can Include in an MMS
MMS messages are capped at about 500 KB of data and 30 seconds of audio or video. In practice, most marketing MMS messages contain a static image or a short GIF rather than video, because the file size constraint is tight. If your file exceeds the limit, carriers will compress it automatically, which can make images look blurry or distorted.
To keep your visuals sharp, follow these guidelines:
- File size: Keep images and GIFs under 600 KB. Anything larger risks noticeable compression.
- Aspect ratio: Portrait (9:16) tends to look best on phone screens, followed by square (1:1). Landscape (16:9) works but displays smaller because the phone shrinks it to fit the message bubble width.
- Resolution: For portrait, 480 x 640 or 1080 x 1920 pixels. For square, 480 x 480 or 600 x 600 pixels.
- GIF length: Six seconds or less for optimal viewing. Longer GIFs tend to load slowly or get compressed into a choppy loop.
Supported file formats typically include JPEG, PNG, and GIF for images, plus MP4 for short video clips. The safest bet for broad compatibility is a JPEG or PNG image under 600 KB.
Performance Benchmarks
MMS and SMS perform similarly on core metrics, but MMS edges ahead in revenue. According to benchmarks from Klaviyo, one of the larger SMS/MMS marketing platforms, MMS messages generate slightly higher average revenue per recipient and slightly lower unsubscribe rates than plain-text SMS. Click and conversion rates are nearly identical between the two formats.
Here’s what “good” looks like for an MMS campaign:
- Click rate: 8.9% to 14.5% is considered good. Top performers hit above 14.6%.
- Conversion rate: 1.0% to 2.0% is good. Above 2.1% is excellent.
- Revenue per recipient: $0.66 to $2.41 is the good range. Strong campaigns exceed $2.42 per recipient.
- Unsubscribe rate: Under 1.4% is healthy. If you’re seeing 2.0% or higher per campaign, your frequency or targeting needs adjustment.
Those click rates are dramatically higher than email marketing, where 2% to 3% is typical. The reason is simple: text messages get opened almost immediately, and there’s no spam folder filtering them out before the recipient sees them.
When MMS Makes Sense Over SMS
MMS costs more per message, so it’s worth being strategic about when you use it. The visual format pays off most when showing a product matters more than describing it. New product launches, flash sales with eye-catching creative, seasonal lookbooks, and event invitations all benefit from an image or GIF. If your message is a simple reminder (“Your order ships tomorrow”) or a short discount code, plain SMS delivers the same result at lower cost.
Many businesses mix the two. They use MMS for one or two high-impact campaigns per month, like a product drop or a holiday sale, and rely on SMS for transactional messages, order updates, and quick promotions where visuals aren’t necessary. This keeps overall messaging costs manageable while still taking advantage of the higher engagement that rich media drives.
Compliance Requirements
MMS marketing falls under the same legal framework as SMS marketing. In the United States, the Telephone Consumer Protection Act (TCPA) requires you to get explicit written consent before sending marketing texts. “Written” in this context includes digital opt-ins, like a customer checking a box on your website or texting a keyword to your number. You cannot add someone to your text list just because they gave you their phone number at checkout or filled out a contact form.
Every MMS you send must also include a way for the recipient to opt out, typically by replying “STOP.” Once someone opts out, you’re required to remove them from your list and stop sending messages. Violations carry fines of $500 to $1,500 per unsolicited message, so the stakes are real.
Beyond federal law, carriers themselves enforce messaging guidelines through their own vetting processes. Most require businesses to register their phone numbers and describe the types of messages they plan to send before campaigns can go out at scale. If your messages generate high complaint rates, carriers can throttle or block your number entirely.
How to Get Started
You’ll need three things to launch MMS campaigns: a text marketing platform, a registered sending number, and a subscriber list built through compliant opt-ins.
Most businesses use a dedicated SMS/MMS platform rather than sending messages manually. Popular options include Klaviyo, Attentive, Postscript, and SimpleTexting, among others. These platforms handle message delivery, subscriber management, opt-out processing, and campaign analytics. Pricing is usually based on the number of messages sent per month, with MMS messages counting at a higher rate than SMS.
For your sending number, you’ll typically choose between a toll-free number, a local 10-digit number, or a short code (a five- or six-digit number). Short codes support the highest sending volumes but cost significantly more to lease and set up. Most small and mid-sized businesses start with a toll-free number, which offers a good balance of deliverability and cost.
Building your subscriber list is the part that takes the most patience. Common opt-in methods include a pop-up on your website offering a discount in exchange for a phone number, a keyword customers can text to join (like “Text JOIN to 55555”), or a checkbox during online checkout. The quality of your list matters more than its size. A smaller list of people who actively chose to hear from you will outperform a large list of lukewarm contacts on every metric.