Doubletick - Email Tracking for Gmail and GSuite vs. Elastic Email

Doubletick is Free and unlimited email tracking for Gmail and Google Workspace (G Suite) with real-time desktop notifications and WhatsApp like double tick marks (✓✓) in your sent box. A single blue tick ✓ indicates that an email has been sent, but yet to be opened by the recipient. Double blue ticks ✓✓ mean that your email has been opened by the recipient and grey ticks indicates that email is not tracked.

Elastic Email is a powerful, affordable email delivery platform designed to help businesses manage email campaigns and chat messages. It enables email marketing, transactional messaging, automated marketing, and two-way communication channels, making it loved by small and mid-sized businesses, startups, and e-commerce businesses. Key aspects of Elastic Email include the Email API & SMTP, which allow developers to easily integrate email sending into their applications to send transactional messages.