
Description: Listmonk is an open-source newsletter and mailing list manager. It allows you to easily create, send, and manage email newsletters and mailing lists. Key features include subscriber management, email templates, A/B testing, analytics, and integration with services like Mailchimp.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Klaviyo is an email marketing and automation platform that helps ecommerce companies segment customers, create targeted email campaigns, and track results. It integrates with ecommerce platforms like Shopify and allows granular customization of emails.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API