TapTalk.io - TapTalk.io is a complete in-app chat SDK and messaging API - Easy integration and customizeable.

Whapi.Cloud - Integrate WhatsApp without limits to your own services or apps! Groups & Buttons, Technical support & Guides. API works stably and does not crash during updates. Whapi.Cloud is Developer-friendly REST API for WhatsApp integration

Applozic - Chat API & In-App Messaging SDK for Mobile & Web Apps Innovate fast, save development cost and delight users with a scalable, secure and customizable Chat

360dialog - 360dialog is a mobile app marketing automation platform that allows app publishers to engage and convert users.

Chat by Stream - Build and ship in app messaging in a few hours

Maytapi - Serverless Whatsapp Api with Chat and Agent support.