CartKeeper: AI Cart Recovery vs Relay: AI SMS Cart Recovery
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 8, 2026 for CartKeeper, Oct 19, 2026 for Relay.
The short answer
- On the Shopify App Store: CartKeeper 4.7 from 39 reviews and Relay 5.0 from 1 reviews.
- Only CartKeeper lists a free plan. Paid plans start at $19/month for CartKeeper and $29/month for Relay.
- CartKeeper lists 4 features Relay’s listing doesn’t mention, including A/B testing, Targeting rules, Templates.
Head to head
- Australia
- Israel
- United Kingdom
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free plan
- · - Perfect for new stores
- · - Recover up to 5 abandoned carts
- · - no credit card needed
Starter
- · - Perfect for new stores
- · - Recover unlimited abandoned carts
Pro
- · - Automatic WhatsApp order confirmations
- · - Automatic WhatsApp review requests
- · - Bulk WhatsApp campaign messaging
- · - Followup messaging
- · - Multilingual websites messaging
- · - Recover unlimited abandoned carts
Advance
- · - AI WhatsApp assistant on your device
- · - Pro features +
- · - Recover unlimited abandoned carts
- · - WhatsApp purchase confirmation
Spark
- · 400 credits per month ($0.1 overage)
- · AI two-way conversations, zero setup
- · Automatic discounts
- · Conversation logs (read-only)
- · Multi-currency support
- · Product sync every 7 days
Engage
- · 1,300 credits per month ($0.085 overage)
- · Everything in Spark, plus:
- · Product sync every 3 days
- · Up to 5 knowledge base documents
Convert
- · 3,850 credits per month ($0.075 overage)
- · Daily product sync
- · Everything in Engage, plus:
- · Priority support
- · Up to 15 knowledge base documents
Scale
- · 11.3K credits per month ($0.065 overage)
- · Everything in Convert, plus:
- · Founder-led onboarding
- · Product sync every 6 hours
- · Up to 50 knowledge base documents
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCartKeeper helps store visitors complete their purchase with AI chat and WhatsApp automations. The on-site bot answers questions, shows product images, and can add items directly to the cart. Automated WhatsApp follow-ups reconnect shoppers who left before finishing checkout. You can also send bulk promos, order updates, and review requests. Install in minutes and track everything inside your Shopify dashboard.
When a customer leaves items at checkout, Relay sends them an SMS and starts a real two-way conversation. The AI knows your products, pricing, shipping, and policies. If a customer asks "does this come in blue?" or "how fast is delivery?", it answers with real data from your store. Relay tries to close at full price first. It only offers a discount if the customer genuinely needs a nudge.
- Recover lost sales with instant WhatsApp messages
- Smart Bulk: send personalized messages at scale
- Multi-language support with custom message per language
- Auto-detects cart abandoners in real time
- AI sales agent trained to close, not just chat. Recovers carts through SMS.
- Auto-syncs products, pricing, policies, and inventory for real-time answers
- Margin-protecting discounts that only trigger as a last resort, not a default
- Multi-currency support that auto-detects the customer's local currency
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 |  CartKeeper |  Relay |
|---|---|---|
| Detected stores | 12 | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Apparel & Accessories, Arts & Entertainment, Electronics | Not published |
| Top store countries | Australia, Israel, United Kingdom | Not published |
Reviews
| Measure | CartKeeper | Relay |
|---|---|---|
| App Store rating | 4.7 ★ | 5.0 ★(ahead) |
| App Store reviews | 39(ahead) | 1 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | CartKeeper | Relay |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $19/month(ahead) | $29/month |
| Longest free trial | 7 days | 14 days |
| Plans listed | 4 | 4 |
Listing
| Measure | CartKeeper | Relay |
|---|---|---|
| Shopify category rank | #53(ahead) | #209 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Oct 28, 2024 | May 13, 2026 |
| Languages | 4 | 1 |
| Developer | Springweb | Relay |
FAQ
CartKeeper and Relay: common questions
- Is CartKeeper or Relay cheaper?
- Only CartKeeper lists a free plan. Paid plans start at $19/month for CartKeeper and $29/month for Relay. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- Which has better reviews, CartKeeper or Relay?
- On the Shopify App Store: CartKeeper 4.7 from 39 reviews and Relay 5.0 from 1 reviews.
- What features does each app list that the other doesn’t?
- CartKeeper lists 4 the others don’t mention, such as A/B testing, Targeting rules, Templates, Time-limited offers. Relay lists 3 the others don’t mention, such as Custom branding, Custom discount codes, Discount offers. 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 8, 2026 for CartKeeper, Oct 19, 2026 for Relay; 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 8, 2026 for CartKeeper, Oct 19, 2026 for Relay. 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.