Publisher disclosure: this comparison is written by WhatFlow. Competitor capabilities are based on the linked public documentation; the WhatFlow screenshots come from our demo store. Examples are illustrative, and results depend on your store and configuration.
WhatFlow and CK (Carthike) at a glance
| Consideration | WhatFlow | CK (Carthike) |
|---|---|---|
| Best fit | WhatsApp order automation and a shared inbox inside Shopify. | CK advertises checkout reminders, COD verification, shipping updates and review requests for services including Judge.me and Loox. The listing also offers a customizable chat button and connection to an existing WhatsApp Business app number. |
| Published pricing | Free app plan with 100 sends included. Starter $4.99/month with 2,000 sends. Overage and applicable Meta charges are separate. | Free Forever includes a chat button and 100 manual cart abandonment messages. VIP at $9.99/month adds automatic recovery, order and review messages. Advanced at $29/month lists custom templates, automation from your own number, and a team inbox with 1,000 incoming messages. Listed automated rates start at $0.02 per message and vary by country. |
| Decision | WhatFlow is where I’d start when the checkout queue is already a recurring task. You can set up automatic reminders, templates and a staffed inbox on Free, then change the allowance as volume grows. | CK’s free manual workflow is a sensible starting point if you want to read each checkout before sending, and its named review integrations are worth testing if they matter to your stack. |
WhatFlow is where I’d start when the checkout queue is already a recurring task. You can set up automatic reminders, templates and a staffed inbox on Free, then change the allowance as volume grows.
When testing WhatFlow and CK (Carthike), ask: Can your team run a test and handle the replies after the send? In WhatFlow, test a Shopify customer or segment send, then try scheduling a separate Inbox broadcast from a spreadsheet or existing conversations. The campaign walkthrough shows the test send, reply handoff and recipient report.
What does CK (Carthike) do well?
CK advertises checkout reminders, COD verification, shipping updates and review requests for services including Judge.me and Loox. The listing also offers a customizable chat button and connection to an existing WhatsApp Business app number. See the Shopify listing.
What does the setup cost?
Free Forever includes a chat button and 100 manual cart abandonment messages. VIP at $9.99/month adds automatic recovery, order and review messages. Advanced at $29/month lists custom templates, automation from your own number, and a team inbox with 1,000 incoming messages. Listed automated rates start at $0.02 per message and vary by country.
If you plan to send 600 automated reminders a month, CK’s free manual allowance isn’t the right baseline. Price its VIP automation and any per-message fees; WhatFlow Starter includes that volume in its app allowance, with Meta charges still separate. Check current WhatFlow pricing for allowances and overage rates.
How would I test it in a Shopify store?
Say your team follows up manually every Friday and sees the same shoppers again on Monday. Trial a timed reminder on an opted-in checkout and make sure a completed purchase exits the reminder path. Then assign any reply to someone who can resolve it.
Compare manual sends, automated sends and incoming inbox messages separately. The plans meter different things, so a single per-message number won’t settle the choice.
Which one would I choose?
CK’s free manual workflow is a sensible starting point if you want to read each checkout before sending, and its named review integrations are worth testing if they matter to your stack.
For WhatFlow in this comparison, I mean the official Cloud API app. I’d pilot it on Free with the shared inbox and the Shopify Flow actions you expect to use. Once the customer journey works, size the messaging plan from the sends you actually expect.
Questions worth asking
How much does CK (Carthike) cost on Shopify?
Free Forever includes a chat button and 100 manual cart abandonment messages. VIP at $9.99/month adds automatic recovery, order and review messages. Advanced at $29/month lists custom templates, automation from your own number, and a team inbox with 1,000 incoming messages. Listed automated rates start at $0.02 per message and vary by country.
When should I choose CK (Carthike) over WhatFlow?
CK’s free manual workflow is a sensible starting point if you want to read each checkout before sending, and its named review integrations are worth testing if they matter to your stack.
What should I test before switching from CK (Carthike)?
Compare manual sends, automated sends and incoming inbox messages separately. The plans meter different things, so a single per-message number won’t settle the choice.
Sources and methodology
We checked these primary sources on November 8, 2026. Vendor pages describe advertised capabilities, rather than independent performance tests. Confirm current pricing, plan limits and availability with each provider.
- CK (Carthike) on the Shopify App Store
Listing, feature descriptions and USD pricing checked November 8, 2026.
- WhatFlow WhatsApp Business API on Shopify
Official API, listed capabilities and Shopify app pricing.
- WhatFlow plans and messaging charges
App allowance and overage pricing; Meta charges are separate.