Klaviyo vs Postscript
Klaviyo vs Postscript: Klaviyo handles both email and SMS, making it more cost-efficient for most stores. Postscript is the dedicated SMS specialist — worth the extra cost only when SMS drives most of your revenue.
You want email + SMS in one platform — Klaviyo's SMS is strong and more cost-effective combined
SMS is your #1 channel and you want the most powerful dedicated SMS tool for Shopify
Pricing Comparison
Feature Comparison
| Feature | Klaviyo | Postscript |
|---|---|---|
| Email campaigns | ✓ | ✗ |
| Automated flows | ✓ | ✓ |
| SMS marketing | ✓ | ✓ |
| Push notifications | ✗ | ✗ |
| Free tier | ✓ | ✗ |
| Shopify native sync | ✓ | ✓ |
| Segmentation | Advanced | Advanced |
| A/B testing | ✓ | Scale+ |
| Predictive analytics | ✓ | ✗ |
| API access | ✓ | ✓ |
Pros & Cons
Klaviyo
Postscript
Who Should Use Each?
Stores doing $10K+/mo that rely on email as a primary revenue channel
Early-stage stores under $5K/mo — pricing scales too fast to justify
Stores doing $1M+/yr with a dedicated SMS strategy where SMS is a primary revenue channel
Stores wanting email + SMS in one platform — Klaviyo or Omnisend cover both at lower cost
Our Verdict
Klaviyo for combined email + SMS; Postscript only if SMS is your primary revenue channel.
You want email + SMS in one platform — Klaviyo's SMS is strong and more cost-effective combined
SMS is your #1 channel and you want the most powerful dedicated SMS tool for Shopify
Frequently Asked Questions
Which is better for Shopify: Klaviyo or Postscript?
Klaviyo for combined email + SMS; Postscript only if SMS is your primary revenue channel. Choose Klaviyo when: You want email + SMS in one platform — Klaviyo's SMS is strong and more cost-effective combined. Choose Postscript when: SMS is your #1 channel and you want the most powerful dedicated SMS tool for Shopify.
Is Klaviyo free?
Yes, Klaviyo has a free plan: 500 contacts, 500 emails/mo, 150 SMS credits.
Is Postscript free?
No, Postscript does not have a free plan. Paid plans start at $100/mo.
How much does Klaviyo cost?
Klaviyo paid plans start at $20/mo (Per active profile (contact)). Scales steeply: 10K contacts = $150/mo, 50K contacts = $720/mo
How much does Postscript cost?
Postscript paid plans start at $100/mo (Monthly base + per-SMS usage credits). Additional SMS credits ~$0.015/message; large lists easily reach $1,500+/mo total
What is the main difference between Klaviyo and Postscript?
Klaviyo vs Postscript: Klaviyo handles both email and SMS, making it more cost-efficient for most stores. Postscript is the dedicated SMS specialist — worth the extra cost only when SMS drives most of your revenue.
Get weekly Shopify app insights
One tip per week on apps, margins, and growing your Shopify store. Free, unsubscribe anytime.