Doubletick - Email Tracking for Gmail and GSuite vs. SuprSend

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.

SuprSend is a notification infrastructure built for modern product teams who need reliable, scalable, and developer-friendly notifications without building everything from scratch. WHY TEAMS CHOOSE SUPRSEND: Stop Rebuilding Notifications Most teams waste 3-6 months building notification systems that break at scale. SuprSend gives you enterprise-grade infrastructure out of the box so you can ship notifications in days, not months. One API, Every Channel Send to email, SMS, WhatsApp, Slack, MS Teams, mobile push, web push, and in-app—all with a single API call.