Klaviyo: Email Marketing & SMS vs Postflows
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 10, 2026.
The short answer
- Paid plans start at $15/month for Klaviyo and $89/month for Postflows.
- Klaviyo lists 65 features Postflows’s listing doesn’t mention, including A/B testing, Abandoned cart, AI generation.
Head to head
Email, SMS, and more - a unified customer platform
- United States
- United Kingdom
- Australia
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · AI-assisted, on-brand content
- · Built-in dashboard & reporting
- · Guided onboarding setup
- · One place for forms, emails, and flows
- · Seamless migration to full platform
- · Set up directly in Shopify Admin
SMS
- · Automated two-way conversations
- · Branded SMS links
- · Customizable multi-channel attribution
- · Multi-channel A/B testing
- · Multi-channel segmentation and flows
- · SMS AI for campaign creation
- · 160+ campaign templates
- · Email AI for campaign creation
- · Multi-channel A/B testing
- · Multi-channel segmentation and flows
- · Personalized product recommendations
- · Predictive analytics
Starter
Growth
Scale
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureGo beyond the basics with the Klaviyo marketing app. New stores get a guided setup — sign-up form, welcome email, and abandoned-checkout flow — without leaving Shopify Admin. Unify data from 350+ integrations and boost marketing performance with campaigns, smart segmentation, and automated workflows from Klaviyo’s AI Agents.
Shoppers want to know where their order is, and every unanswered question becomes a support ticket. Postflows turns live carrier tracking into 8 shipping events, from order placed to delivered. Each event goes straight to the email or SMS platform you already use, where it can start a flow, so brands send branded shipping updates without switching tools.
- Use data from Shopify and other apps – web activity, tags, catalog, coupon codes
- Create segments and triggers using complete historical and real-time data
- Use omnichannel templates for Welcome, Back in Stock, Abandon, Price Drop & more
- Get real-time revenue data per automation, campaign, segment, and channel
- 10+ delivery event triggers for Klaviyo
- Branded tracking page with origin masking
- Automated WISMO ticket reduction
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Klaviyo |  Postflows |
|---|---|---|
| Detected stores | 282,108 | Not published |
| Net store change, 28 days | +564 | 0 |
| Stores added, 28 days | 2,827 | Not enough data |
| Big-brand share | 15% | Not enough data |
| Top store categories | Apparel & Accessories, Health & Beauty, Home & Garden | Not published |
| Top store countries | United States, United Kingdom, Australia | Not published |
Reviews
| Measure | Klaviyo | Postflows |
|---|---|---|
| App Store rating | 4.7 ★ | Not published |
| App Store reviews | 3,434 | Not published |
| New reviews, 28 days | 57 | Not enough data |
| Reviewers a year or more in | 43% | Not enough data |
FAQ
Klaviyo and Postflows: common questions
- Is Klaviyo or Postflows cheaper?
- Paid plans start at $15/month for Klaviyo and $89/month for Postflows. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Klaviyo lists 65 the others don’t mention, such as A/B testing, Abandoned cart, AI generation, Analytics. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 10, 2026; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 10, 2026. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.