Elias here with Shopify Support. That's a great question!
There are a couple of third-party apps that does SMS cart recovery and/or SMS marketing, and I've handpicked a couple of these apps for you to try. These apps offer different features, such as analytics or automations, so you'll want to try them out and see which one works best for you.
If you need any assistance with these apps, you can always reach out to the developer through the contact information found in the Support section of their app's page.
Let me know if this is what you're looking for?
Hey! If you haven't found a solution, I would recommend TxtCart from the previous answer. They allow conversational marketing so your cart recovery message is more personalized to the shopper. SMS experts will reply to questions your shoppers have and help them checkout. Do try it out!
Hey @Jean09! You’re totally right, such tools can automatically send an SMS message to the customers who have abandoned their carts, encouraging them to come back and complete their orders. Have you found a solution already? If not, there’s another SMS marketing app called Senderium that has this feature, besides many additional ones. Both of the pricing plans have it covered so you can even use on a tight budget. Recommend to try it out!