Gmail

Gmail Email Tracker Extension

The free Gmail email tracker extension for Chrome. Track, Remind, and Send later on Gmail compose — double checks on sent mail and a side panel for thread analytics.

7-day Pro trial · No credit card · Microsoft or Google sign-in

Gmail compose with Flexus TrackMail email tracker extension toolbar

Compose

Track next to Gmail Send

A compact Track control sits on compose. Leave it on and each send registers open tracking and link rewriting automatically.

  • Track / Remind / Send later
  • Mailtrack-style toggle
  • Does not leave Gmail
Gmail compose TrackMail toolbar

Sent mail

Double checks when they read

Green double checkmarks and open counts appear on tracked sent messages — plus a path to full history.

  • Opened N times card
  • Last opened time
  • Desktop / place signals
Gmail sent with open checks

Side panel

Thread analytics without a new app

Open the Flexus TrackMail side panel for opens, clicks, CTR, and a timeline for the contact.

  • Shared with Outlook history
  • Desktop open toasts
  • Google OAuth sign-in
Gmail side panel analytics

How it works

Set up the Gmail extension

01

Sign in with Google

Create your Flexus TrackMail account at trackmail.theflexus.com.

02

Add the Chrome extension

Install from the Chrome Web Store, then pin Flexus TrackMail for Gmail.

03

Send with Track on

Compose as usual — TrackMail handles the rest.

Who it’s for

Who lives in Gmail

Founders

Track investor and customer mail from Chrome.

Recruiters

See opens on outreach without leaving Gmail.

Agencies

Follow proposals and creative links.

Consultants

Confirm clients opened statements and decks.

FAQ

Gmail email tracker extension — FAQ

Is there a free Gmail email tracker extension?

Yes. Flexus TrackMail is a free Chrome extension for Gmail with unlimited open and click tracking on the Free plan. Upgrade to Pro or Business to remove the tracking watermark and unlock scheduled send and reminders.

How does the Gmail email tracker extension work?

After you install the extension and sign in with Google, a small Track toggle appears next to Gmail Send. Leave it on and Flexus TrackMail embeds an open-tracking pixel and, optionally, click-tracking links — no changes to how you write or send email.

Will the recipient know their email is being tracked?

The extension does not notify the recipient. Detection works the same way most read-receipt and email-tracking tools work: a small tracking pixel loads when the message is opened.

Does the Gmail tracker extension show real-time read receipts?

Yes — you get a desktop notification the moment your email is opened, plus a double-checkmark indicator and open count directly on the sent message in Gmail.

Can I track links and attachments too?

Yes. Flexus TrackMail rewrites links in your email so you can see exactly which link was clicked and when, alongside open tracking.

Does it work with both Gmail and Outlook?

Yes — the same Flexus TrackMail account works with the Gmail Chrome extension and the Outlook add-in, so you can track email from either inbox.

Add tracking to Gmail

7-day Pro trial for Outlook and Gmail. No credit card required.