Know when your emails get read
Invisible Mail Tracker for Gmail gives you real-time notifications when recipients open your emails. Perfect for sales, recruiting, and anyone who needs to follow up at the right moment.
Trusted by teams at leading companies
Everything you need to track emails
Powerful features that help you understand how recipients engage with your emails.
Real-time Open Tracking
Know exactly when your emails are opened, down to the second.
Link Click Analytics PRO
See who actually clicks your links — with human-vs-bot confidence, not just raw counts.
Instant Notifications PRO
Real-time email and in-app alerts the moment a real person — not a bot — opens or clicks.
Detailed Analytics
Confirmed-human open rate, timelines and per-contact engagement — the real numbers, not inflated ones.
Privacy First
Your data stays protected. Gmail access is limited to the features you explicitly enable.
Lightning Fast
Zero impact on your email sending speed.
Bot-proof Accuracy PRO
Every open and click is scored human, machine or unknown — so Apple Mail, Gmail proxy and Outlook scanners don't inflate your numbers.
Follow-up Reminders PRO
Automatic nudges when an email isn't opened in days, or was opened by a human but never got a reply.
Contact Engagement PRO
Every recipient ranked hot, warm or cold from confirmed-human opens, so you know who to chase next.
Get started in 3 simple steps
Install Extension
Add Invisible Mail Tracker for Gmail to Chrome in one click
Compose Email
Write your emails as usual in Gmail
Get Notified
Receive alerts when emails are opened
Loved by professionals worldwide
"Invisible Mail Tracker for Gmail transformed how our sales team follows up. We've increased our response rate by 40%."
Sarah Chen
Sales Director, TechFlow
"Essential tool for recruitment. I know exactly when candidates read my offers."
Marcus Johnson
Recruiter, HireFirst
"The insights are incredible. It's like having a superpower for email communication."
Emily Roberts
Founder, Starlight Agency
Clear plans. Clear limits.
Main difference: Free includes 5 invisible trackers/month (+personal bonus codes) and then unlimited with watermark. Pro is unlimited for both invisible and watermark, with deeper analytics.
Free
For personal usage and early testing
- • Invisible limit: 5 per month (+personal bonus codes)
- • Watermark fallback: unlimited tracked emails with watermark
- • Analytics: basic open stats (count + last activity)
- • Whitelabel: none
- • Open tracking dashboard & history
- — No link clicks, alerts, reminders or bot filtering
Pro
For sales teams and high-volume senders
- • Invisible: unlimited
- • Watermark: unlimited + removable for clean emails
- • Link click tracking with human-vs-bot confidence
- • Bot-proof accuracy: filters Apple / Gmail / Outlook false opens
- • Email + in-app alerts on confirmed-human opens & clicks
- • Follow-up reminders: no-open & no-reply nudges
- • Contact engagement scoring (hot / warm / cold)
- • Analytics: advanced breakdowns + custom domain
- • Priority support
Free vs Pro at a glance
Feature-by-feature comparisonTracking limit
Free: 5 invisible/month (+personal bonus codes), then unlimited with watermark
Pro: Unlimited invisible + unlimited watermark
Watermark
Free: Auto after invisible quota
Pro: Removable
Analytics depth
Free: Basic
Pro: Advanced
Notifications and support
Free: Standard
Pro: Priority
Whitelabel
Free: None
Pro: Watermark + Custom Domain
Link click tracking
Free: —
Pro: With human-vs-bot confidence
Open accuracy
Free: Raw open counts
Pro: Per-open human / machine confidence
Real-time alerts
Free: —
Pro: Email + in-app, bot-filtered
Follow-up reminders
Free: —
Pro: No-open & no-reply nudges
Contact engagement
Free: —
Pro: Hot / warm / cold scoring
Switching from another tracker? See the Mailtrack alternative, Streak alternative or Yesware alternative guide.
Frequently asked questions
Everything you need to know about Invisible Mail Tracker for Gmail.
How does the invisible Gmail email tracker work?
Invisible Mail Tracker for Gmail injects a tiny invisible tracking pixel into the email you send through Gmail. When the recipient opens the message, the pixel loads from our server and we record the open event in real time, including timestamp and engagement details.
Is the email tracker really invisible to the recipient?
Yes. The Pro plan and the first 5 monthly tracked emails on the Free plan use a transparent 1x1 pixel that does not display anything to the recipient and does not add any visible footer or watermark.
Do I need to install anything to track Gmail emails?
You can use the Gmail Add-on or the Chrome extension. Both connect to your Gmail account through Google OAuth — no SMTP changes, no proxies and no extra configuration required.
Is my email data safe?
We use Google OAuth with the minimum required scopes, encrypt refresh tokens at rest, and never sell your data or use it to train AI models. See our Privacy Policy for full details.
How much does the email tracker cost?
There is a Free plan with 5 invisible tracked emails per month and unlimited tracking with a small watermark. Pro starts at $2.49/month billed yearly with unlimited invisible tracking, advanced analytics and watermark removal. See pricing.
Does it work with G Suite / Google Workspace?
Yes, it works with personal Gmail and Google Workspace accounts. Workspace administrators can install the add-on for the whole domain.
Send with confidence. Follow up with data.
Start on Free with invisible + watermark fallback, then upgrade to Pro for unlimited invisible, removable watermark, and advanced analytics.