Cartnio Reviews & Loyalty vs Klaviyo: Product Reviews
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 11, 2026.
The short answer
- Only Cartnio Reviews & Loyalty lists a free plan. Paid plans start at $19/month for Cartnio Reviews & Loyalty and $25/month for Klaviyo.
- Cartnio Reviews & Loyalty lists 11 features Klaviyo’s listing doesn’t mention, including Custom programs, Custom requests, Custom rewards.
Head to head
- United States
- Australia
- United Kingdom
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · 50 review requests a month
- · Loyalty programme
- · Photo and video reviews
- · Product Q&A
Growth
- · 500 review requests a day
- · Priority email support
- · Remove “Powered by Cartnio”
Scale
- · 5,000 review requests a day
- · Help migrating from another reviews app
Free
- · Automate reviews with email and SMS
- · Custom questions
- · Import existing reviews
- · Reward customers with unique coupons
Reviews
- · All free features
- · Review request timing based on delivery
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCartnio emails each customer a one-time review link after fulfilment, so reviews come from real buyers and carry a Verified buyer badge. Customers can add photos and videos, and you approve every review. Shoppers can ask product questions. Add reviews, Q&A and star ratings with theme blocks.
Klaviyo Reviews collects text, photo, and video reviews with automated email and SMS requests from prebuilt flows. Verified reviews build trust, and AI helps customers write reviews and drafts your replies in your brand voice. Show ratings, summaries, and reviews in on-brand widgets, sync to Google Shopping, and add custom questions.
- Review requests emailed automatically after each order is fulfilled
- Verified buyer badges, photo and video reviews, and product Q&A
- Theme blocks for reviews, Q&A, star ratings and review carousels
- Automate review requests with email and SMS flows
- Showcase top reviews in emails & on your website
- Build segments based on star rating & custom questions
- Reward reviewers with a unique coupon
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 | |
|---|---|---|
| Detected stores | Not published | 23,501 |
| Net store change, 28 days | 0 | +265 |
| Stores added, 28 days | Not enough data | 485 |
| Big-brand share | Not enough data | 13% |
| Top store categories | Not published | Apparel & Accessories, Health & Beauty, Home & Garden |
| Top store countries | Not published | United States, Australia, United Kingdom |
Reviews
| Measure | Klaviyo | |
|---|---|---|
| App Store rating | Not published | 4.8 ★ |
| App Store reviews | Not published | 234 |
| New reviews, 28 days | Not enough data | 3 |
| Reviewers a year or more in | Not enough data | 43% |
Pricing
| Measure | Klaviyo | |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $19/month(ahead) | $25/month |
| Longest free trial | Not listed | Not listed |
| Plans listed | 3 | 2 |
Listing
| Measure | Klaviyo | |
|---|---|---|
| Shopify category rank | Not enough data | #11 |
| Shopify App Charts | Not on this week’s charts | #23 on the Shoplist 100 |
| Built for Shopify | No | No |
| Launched | Nov 10, 2026 | Jun 9, 2022 |
| Languages | 1 | 6 |
| Developer | Dormier | Klaviyo |
FAQ
Cartnio Reviews & Loyalty and Klaviyo: common questions
- Is Cartnio Reviews & Loyalty or Klaviyo cheaper?
- Only Cartnio Reviews & Loyalty lists a free plan. Paid plans start at $19/month for Cartnio Reviews & Loyalty and $25/month for Klaviyo. 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?
- Cartnio Reviews & Loyalty lists 11 the others don’t mention, such as Custom programs, Custom requests, Custom rewards, Points. Klaviyo lists 11 the others don’t mention, such as Automations, Carousels, Filtering, Media galleries. 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 11, 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 11, 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.