Updated 30 March 2026
Klaviyo SMS Pricing: Credits, Costs, and ROI
Klaviyo's SMS pricing runs on a credit system. US domestic texts cost roughly $0.01 each, MMS costs $0.03, and international messages run $0.05 to $0.10. Here is the full breakdown with ROI analysis and competitor comparison.
How the Credit System Works
Every SMS action costs a certain number of credits. The number of credits per message varies by message type and destination country.
| Message Type | Credits Used | Cost per Message | Notes |
|---|---|---|---|
| US Domestic SMS | 1 | $0.01 - $0.015 | Standard text message, 160 character limit |
| US Domestic MMS | 3 | $0.03 - $0.04 | Image or GIF included, higher engagement rates |
| Canada SMS | 3 | $0.03 - $0.045 | Requires separate Canadian number registration |
| UK SMS | 5 | $0.05 - $0.075 | International messaging compliance required |
| Australia SMS | 5 | $0.05 - $0.075 | ACMA compliance for marketing messages |
| France SMS | 7 | $0.07 - $0.105 | Highest credit cost among major markets |
| Germany SMS | 7 | $0.07 - $0.105 | GDPR opt-in requirements apply |
International SMS Gets Expensive Fast
If you sell internationally, SMS costs can multiply quickly. A single text to France costs 7 credits versus 1 credit for a US domestic SMS. A campaign to 1,000 French subscribers would consume 7,000 credits ($70 to $100), while the same campaign to 1,000 US subscribers would use just 1,000 credits ($10 to $15). For international audiences, consider whether email alone delivers sufficient ROI, and reserve SMS for your highest-value segments like VIP customers and active cart abandoners.
Monthly SMS Credit Packages
Buy credits in monthly packages. Larger packages cost less per credit. Unused credits roll over for one billing cycle.
| Credits | Monthly Price | Cost per Credit | Best For |
|---|---|---|---|
| 1,250 | $15 | $0.012 | Testing SMS, very small list |
| 2,500 | $30 | $0.012 | Small store, 500-1,000 SMS subscribers |
| 5,000 | $55 | $0.011 | Growing store, 1,000-2,500 SMS subscribers |
| 10,000 | $100 | $0.010 | Active SMS program, 2,500-5,000 subscribers |
| 25,000 | $225 | $0.009 | Heavy SMS sender, 5,000-10,000 subscribers |
| 50,000 | $400 | $0.008 | Large-scale SMS, 10,000+ subscribers |
| 100,000 | $700 | $0.007 | Enterprise SMS volume, 25,000+ subscribers |
The volume discount from 1,250 credits ($0.012 each) to 100,000 credits ($0.007 each) represents a 42% cost reduction per credit. If you are sending more than 10,000 SMS messages per month, the larger packages offer meaningful savings. However, do not over-buy credits just for the discount. Unused credits only roll over for one billing cycle. If you buy 50,000 credits and only use 30,000, the remaining 20,000 will carry over to the next month but expire if still unused.
SMS vs Email: The Economics
SMS Advantages
- 98%open rate (vs 20-25% for email)
- 19%average click-through rate (vs 2-3% for email)
- 90saverage time to read (vs hours or days for email)
- $0.10-$0.50revenue per SMS for e-commerce (campaign dependent)
SMS Limitations
- 10xmore expensive per message than email
- 160character limit for SMS (less with links)
- 2-3xhigher unsubscribe rate than email
- Strictcompliance rules (TCPA, quiet hours, explicit opt-in required)
SMS ROI by Campaign Type
Not all SMS campaigns generate equal returns. Here are realistic ROI scenarios based on reported e-commerce benchmarks.
| Campaign Type | Messages/Mo | Cost | Revenue/Message | Revenue | ROI |
|---|---|---|---|---|---|
| Abandoned cart SMS | 500 | $6.00 | $0.35 | $175 | 2,817% |
| Welcome series SMS | 300 | $3.60 | $0.15 | $45 | 1,150% |
| Flash sale blast | 2,000 | $24.00 | $0.50 | $1,000 | 4,067% |
| Back-in-stock alert | 200 | $2.40 | $0.80 | $160 | 6,567% |
| Post-purchase upsell | 400 | $4.80 | $0.25 | $100 | 1,983% |
Key insight: Back-in-stock alerts and flash sale SMS campaigns deliver the highest ROI because they reach people with immediate purchase intent. Abandoned cart SMS also performs well, especially when paired with a follow-up email flow. The worst-performing SMS campaigns are general newsletters and brand updates, where the high cost per message is hard to justify compared to sending the same content via email at a fraction of the cost.
Klaviyo SMS vs Dedicated SMS Platforms
Should you use Klaviyo's built-in SMS or a dedicated platform like Attentive or Postscript?
| Platform | Cost/SMS | Cost/MMS | Integration | Best For |
|---|---|---|---|---|
| Klaviyo | $0.007 - $0.015 | $0.021 - $0.045 | Built into email platform | E-commerce stores already on Klaviyo for email |
| Attentive | $0.01 - $0.025 | $0.02 - $0.05 | Standalone SMS-first platform | Brands prioritizing SMS as primary channel |
| Postscript | $0.015/message | $0.045/message | Shopify-native SMS platform | Shopify stores wanting dedicated SMS tools |
| Omnisend | $0.015/credit | $0.045/credit | Built into email platform | Budget-conscious stores wanting email + SMS |
| Twilio (DIY) | $0.0079/segment | $0.02/segment | API only, requires development | Technical teams building custom SMS flows |
The Attentive Question
Attentive is the most common alternative to Klaviyo SMS and the leader in dedicated SMS marketing platforms. The case for Attentive over Klaviyo SMS comes down to three factors: subscriber growth tools, message personalization depth, and compliance management.
Attentive's SMS subscriber acquisition tools are significantly more advanced than Klaviyo's. Attentive offers two-tap mobile sign-up (one tap to pre-populate the phone number, one tap to confirm), which can increase SMS opt-in rates by 30 to 50% compared to standard form-based collection. Klaviyo uses traditional form-based opt-in, which has higher friction on mobile devices.
On pricing, Attentive is generally 50 to 100% more expensive than Klaviyo per message for similar volumes. Attentive also requires a platform fee (typically $300 to $1,000 per month) on top of per-message costs. For a store sending 10,000 SMS messages per month, Klaviyo would cost roughly $100 to $120 while Attentive might cost $250 to $400 including the platform fee.
Verdict: Use Klaviyo SMS if you are already on Klaviyo for email and want a simple, integrated solution. The coordinated email-and-SMS flows alone save significant time. Switch to Attentive only if SMS is a primary revenue channel generating more than $50,000 per month, and you need Attentive's superior subscriber acquisition tools to scale your SMS list faster.
Optimizing Your Klaviyo SMS Spend
Start with automated flows, not campaigns
Abandoned cart, welcome series, and back-in-stock SMS flows generate the highest ROI because they target people with immediate purchase intent. Add broadcast campaigns later once you have flow revenue established.
Use SMS only for time-sensitive messages
Flash sales, limited drops, restock alerts, and delivery updates are perfect for SMS. Weekly newsletters and brand stories belong in email. Sending the wrong content via SMS burns subscribers and wastes credits.
Segment aggressively before sending
Never blast your entire SMS list. Segment by purchase recency, average order value, and engagement. A VIP customer segment of your top 20% of buyers will generate 80% of your SMS revenue at a fraction of the total cost.
Test MMS vs SMS cost-effectiveness
MMS costs 3x more per message but often sees 2x higher click-through rates because of the visual element. Run A/B tests on your product-focused campaigns to determine whether the higher engagement justifies the extra cost for your specific audience.
Monitor your credit usage weekly
Klaviyo does not send low-credit warnings until you are about to run out. Set a calendar reminder to check credit balances weekly. Running out mid-flow means your abandoned cart SMS stops sending until you refill, costing you recovered revenue.
Set quiet hours to protect your reputation
Klaviyo enforces quiet hours (no SMS between 8pm and 9am in the recipient's timezone) by default, but you should be even more conservative. Restrict marketing SMS to 10am to 7pm for best engagement rates and lowest unsubscribe rates.