nativeMsg offers a fresh take on conversational commerce and ads through interactive "choose your adventure" experiences that boost ROAS and conversion rates.
Octane is a Messenger and SMS marketing platform built for Ecommerce stores, currently dedicated completely to integrating with Shopify and Shopify Plus.
Maxwell offers a free and premium version for Messenger and WhatsApp. They have now productized their service and opened it up to Ecommerce brands at large.