Quick answer
No platform wins for every store. Klaviyo and Omnisend suit stores that want email and SMS in one tool; Postscript suits stores that make SMS their main channel and want listed rates; Attentive suits larger programs that buy through a demo. Price your own monthly volume before you choose.
| Klaviyo | Omnisend | Postscript | Attentive | |
|---|---|---|---|---|
| How SMS is sold | Add-on to email plans; $5 of mobile messages on the free plan | SMS and MMS on the Pro plan | SMS-first plans at $0, $100 and $500 a month | Modular plan quoted from messages, list size and channels |
| Listed SMS rate (US, Nov 2026) | Not shown in the plan table | $0.009 down to $0.007 by spend | $0.009, $0.008 or $0.007 by plan | Not published |
| MMS | Add-on | US and Canada only | $0.045, $0.03 or $0.024 by plan | Part of the plan |
| Carrier fees | Check in your account | Not stated on the pricing page | Added on top; US average $0.0033 per SMS | Not stated |
| Email in the same tool | Yes | Yes | Priced separately | Yes, in the text and email package |
| How you buy | Self-serve | Self-serve | Free trial | Demo |
Klaviyo
- How SMS is sold
- Add-on to email plans; $5 of mobile messages on the free plan
- Listed SMS rate (US, Nov 2026)
- Not shown in the plan table
- MMS
- Add-on
- Carrier fees
- Check in your account
- Email in the same tool
- Yes
- How you buy
- Self-serve
Omnisend
- How SMS is sold
- SMS and MMS on the Pro plan
- Listed SMS rate (US, Nov 2026)
- $0.009 down to $0.007 by spend
- MMS
- US and Canada only
- Carrier fees
- Not stated on the pricing page
- Email in the same tool
- Yes
- How you buy
- Self-serve
Postscript
- How SMS is sold
- SMS-first plans at $0, $100 and $500 a month
- Listed SMS rate (US, Nov 2026)
- $0.009, $0.008 or $0.007 by plan
- MMS
- $0.045, $0.03 or $0.024 by plan
- Carrier fees
- Added on top; US average $0.0033 per SMS
- Email in the same tool
- Priced separately
- How you buy
- Free trial
Attentive
- How SMS is sold
- Modular plan quoted from messages, list size and channels
- Listed SMS rate (US, Nov 2026)
- Not published
- MMS
- Part of the plan
- Carrier fees
- Not stated
- Email in the same tool
- Yes, in the text and email package
- How you buy
- Demo
Choose Klaviyo if…
- You already run email flows in it
- You want SMS and email segments from the same data
- You can price from inside your account
Choose Omnisend if…
- You want listed US rates by spend tier
- You want email, SMS and web push on one plan
- You are happy to be on the Pro plan
Choose Postscript if…
- SMS is your main retention channel
- You want a rate you can read before you sign up
- You want a free trial first
Choose Attentive if…
- You run a large list and want a managed program
- You are happy to buy through a demo
- You want compliance tooling built in
A note before we start: we set up and migrate Klaviyo accounts for online stores, so we know that platform best. This best sms marketing platforms 2026 comparison uses only each vendor’s own pages, dates every detail, and says where another platform fits better.
The right SMS platform depends on how you want to pay for texts: as an add-on inside an email tool, as a plan tier, as an SMS-first plan or as a quote. Price one full month of your own sends before you choose.
Which SMS marketing platform is best for a Shopify store?
The one that matches how you already work. If your email flows live in Klaviyo or Omnisend, texting from the same tool is simplest; if SMS is your main channel, an SMS-first tool can read better on cost. As of November 2026, Klaviyo’s free plan includes $5 of mobile messages a month, which is enough to test a flow but not to run a program.
In a best sms marketing platforms 2026 comparison for Shopify stores, one more option belongs on the list. Shopify itself now offers Shopify Messaging, which sends email, SMS and WhatsApp campaigns from the Shopify admin, with pricing based on how many messages you send, on the Basic, Grow, Advanced and Plus plans. We leave it out of the table below because it works differently from the four platforms we compare, but it is worth pricing for a very small list.
Any best sms marketing platforms comparison for your store should start with three questions. How many subscribers can you text, and how many texts do you send each month? Do you already run email flows somewhere? And who will build and check the consent forms?
For a head-to-head on two of these tools, see our Attentive vs Klaviyo and Omnisend vs Klaviyo guides.
How do the platforms compare in the best SMS marketing platforms 2026 comparison?
They differ most in how they sell SMS, not in what a text looks like. As of November 2026, one is an add-on, one a plan tier, one SMS-first and one a quote, and that split is the core of this best sms marketing platforms 2026 comparison. That split is the core of any best sms marketing platforms comparison.
- Klaviyo: as of November 2026, its pricing page lists $5 of mobile messages a month on its free plan and SMS and MMS as an add-on on the paid plans. The page text we could read did not show a per-message rate, so price it inside your account.
- Omnisend: as of November 2026, its pricing page puts SMS and MMS on the Pro plan, with US rates from $0.009 to $0.007 per SMS depending on spend, and MMS for US and Canada recipients only.
- Postscript: as of November 2026, its pricing page lists Starter at $0 a month with a $49 monthly minimum spend, Growth at $100 and Professional at $500, with per-SMS rates of $0.009, $0.008 and $0.007.
- Attentive: as of November 2026, its pricing page says plans are built around the number of messages, the size of your list, the channels you use and the AI tools you want. It publishes no rates, so you buy through a demo.
In this best sms marketing platforms 2026 comparison, that means two of the four give you a number to work with before you talk to anyone, one makes you open an account, and one makes you book a call.
How much does SMS marketing cost on each platform?
Your monthly bill is subscribers times texts per subscriber times the rate, plus the plan fee and carrier fees. A listed rate alone tells you little until you apply it to your own volume.
A best sms marketing platforms 2026 comparison that stops at the rate misleads, so here is a worked example, not a quote. Say a store texts 10,000 subscribers 4 times a month, which is 40,000 texts. At the rates listed in November 2026, the message cost alone comes to this:
As of November 2026, the gap between the top and bottom bar is $80 a month in message cost, but the Professional plan on Postscript carries a $500 monthly fee while Starter carries none. So the cheapest rate is not automatically the cheapest month. For Omnisend, the US tier is set by spend: 40,000 texts at $0.0085 is $340, which sits in the $50 to $999.99 tier.
Formula to run on your own list, whichever best sms marketing platforms 2026 comparison you use:
- Subscribers who have opted in to SMS (not your email list).
- Multiply by texts per subscriber per month.
- Multiply by the listed rate for your tier.
- Add the plan fee, MMS sends and carrier fees.
What does a best SMS marketing platforms comparison leave out?
Four things that sit on top of the rate: carrier fees, MMS, plan fees and the cost of a list you cannot legally text. Each one can change which platform comes out cheapest in a best sms marketing platforms comparison.
- Carrier fees: Postscript says carrier fees are added on top, with an average US cost of $0.0033 per SMS and $0.00799 per MMS, as of November 2026. On 40,000 texts, that is about $132 extra. Ask every vendor whether its rate includes carrier fees; Omnisend’s and Attentive’s pages we read do not say.
- MMS: pictures cost more per message. Postscript lists $0.045, $0.03 or $0.024 per MMS by plan, and Omnisend limits MMS to US and Canada recipients.
- Plan fees and minimums: as of November 2026, Postscript lists a $0 plan with a $49 minimum spend, a $100 plan and a $500 plan, and each can be right at a different volume.
- A bad list: numbers you had no consent to text cost you in complaints and fines, which no rate card shows.
What are the SMS marketing rules before you send?
Get separate, optional consent, disclose what people are signing up for, and honor any reasonable opt-out. Those rules apply whichever platform you pick, so no best sms marketing platforms comparison can replace them.
Klaviyo’s SMS consent guide says consent for email does not count as consent for SMS, that SMS consent must not appear required, and that double opt-in is a US carrier requirement for any cart abandonment flow. It also says purchased or lead-generation lists are not valid consent.
The FCC rule at 47 CFR 64.1200 says the words stop, quit, end, revoke, opt out, cancel and unsubscribe are a valid revocation, that a sender must honor a request within 10 business days, and that a sender may not designate one exclusive way to opt out. It defines prior express written consent as a signed written agreement that names the number to be texted. This is not legal advice; ask your own counsel about your program.
Our free SMS audit covers this ground: we test your sign-up forms and checkout for separate, optional consent and disclosure text, review your flows against US cart abandonment rules and quiet hours, and send a PDF report within 2 workdays. Start with the free audit, or read how our ecommerce SMS marketing setup works.
Is SMS better than email marketing?
Neither wins on its own, and a best sms marketing platforms comparison should say so; they do different jobs. Email carries longer content at low cost per send, while SMS is quicker but costs per message and has stricter consent rules.
How you measure them matters too, and it changes any best sms marketing platforms 2026 comparison of the two. Klaviyo’s conversion tracking guide says new accounts credit orders to an SMS click within 5 days or an SMS delivery within 12 hours by default, while email uses 5 days for opens and clicks. A text can therefore look better or worse purely because of the window you chose. Compare the two channels on the same window and the same orders, not on the dashboard default.
In practice, most stores keep email as the base and add SMS for shipping updates, back-in-stock alerts and a few promotions, then check whether the text earned orders the email would not have.
How do you choose and switch SMS platforms?
Use the table in this best sms marketing platforms comparison to shortlist two or three tools, price your own month on each, and switch in an order that keeps consent intact. The easiest switch is the one where subscribers never get a second opt-in message. As of November 2026, Omnisend’s pricing page lists a free migration of 5 days, so ask each vendor what help it gives before you pay for a move.
- Export phone numbers with their consent status and the date and source of consent.
- Keep unsubscribed numbers suppressed on the new platform.
- Rebuild your main flows before you turn the old ones off.
- Check double opt-in on cart abandonment before you go live.
- Send a small test, then move the rest.
If your email flows are in Klaviyo, our Klaviyo email marketing service covers the setup, and Klaviyo migration covers moving to or from it. Plans and rates change often, so check each vendor page again on the day you sign up, and use our other buying guides to compare the rest of your stack. If you want a second pair of eyes on the shortlist, the best sms marketing platforms 2026 comparison above is a starting point; the audit is the next step.