Push notifications for ecommerce

PushOwl (acquired by Brevo) is an app for Shopify stores that sends web push, email and SMS notifications to recover abandoned carts, announce offers and alert customers to restocks, with a genuinely useful free plan and pricing that scales by send volume rather than number of subscribers.

Free plan with up to 500 push/email notifications per month and unlimited subscribers. Plus plan from $19/month (up to 30,000 push, abandoned cart). Power plan from $79/month (unlimited push, flash sales, segmentation). Enterprise plan from $149/month with advanced automation.