How Seenify Works
From composing your email in Gmail to receiving blue double checkmarks and instant alerts. Here is the seamless journey of a tracked message.
Add Seenify to your browser in 1 click
Install the lightweight Seenify extension from the Chrome Web Store or Firefox Add-ons. No complex email server configurations, no IMAP passwords, and no credit card required.
- Chrome, Brave, Edge & Firefox supported out of the box
- Manifest V3 compliant: sandboxed, battery-friendly, and ultra-secure
- 100% Free Forever: unlimited basic tracking without paying a dime
Add to Chrome — Free
Native double checkmark tracking in Gmail
Click "Compose" in Gmail as usual. Seenify adds an intuitive tracking toggle right next to your Send button. When tracking is enabled, an invisible, privacy-safe 1x1 cryptographic pixel is attached.
- Self-Open Prevention: previewing your sent mail never triggers false opens
- Recipient-level tracking: individual stats for group email threads
- Zero signature / watermark: completely clean and professional
Hi Alex, attached is the revised proposal. Let me know when you have a moment to review!
Know the exact second your email is opened
The instant your recipient views your email, the gray checkmarks (✓✓) turn bright blue in your Gmail Sent folder. Simultaneously, a desktop notification pops up with the recipient's name, timestamp, and device insights.
- Real-time SSE push alerts: zero latency notification delivery
- Device & client detection: see if opened on iPhone, Android, or Mac
- Full activity history: searchable audit logs in your extension dashboard
See How Checkmarks Appear in Gmail
Here is an exact simulation of your Gmail Sent folder with Seenify active:
Sent Mail - seenify.in@gmail.com
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Gmail
Built for Absolute Privacy & Speed
Seenify is designed from the ground up to operate without accessing your personal emails or attachments.
Zero Email Reading
We never read, scrape, or store your email body or attachments. Strictly adheres to Google API Limited Use.
Sub-25ms Edge Alerts
Cloudflare Workers edge architecture logs opens and pushes real-time Server-Sent Events with zero lag.
Network Self-Open Block
Declarative Net Request blocks sender's own pixel requests at browser level to prevent false open triggers.
Device & OS Insights
Determine whether recipients open on desktop (Windows/Mac) or mobile (iOS/Android) for smarter follow-ups.
Ready to start tracking in Gmail?
Add Seenify to Chrome or Firefox in seconds. Always free with unlimited email tracking.