Growth · alternatives · 2026

24 alternatives to SONAR - An Email Tracker for Gmail

See when your emails are read, every time

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. SONAR - An Email Tracker for Gmail launched in 2022; newer entries below may have overtaken it.

1. 1
   Mail Track▲168

   Gmail extension to track when your emails are opened

   2023 · mailtrack.email · its alternatives →

2. 2
   Unlimited Email Tracker▲496

   Track opens and clicks, set reminders and delays in Gmail

   2019 · snov.io · its alternatives →

3. 3
   Email Open Tracker for GMAIL▲126

   Keep an eye on your email opens

   2024 · its alternatives →

4. 4
   Doubletick for Gmail▲120

   Track email opens, know which emails are opened by recipient

   2021 · its alternatives →

5. 5
   Mailtrack.io▲282

   The best email tracking solution I've found. Free

   2014 · mailsuite.com · its alternatives →

6. 6
   ContextSmith Free Email Tracker▲121

   Know when and where your emails are read

   2017 · chromewebstore.google.com · its alternatives →

7. 7
   Email Tracker – Find out when and if people view your emails seamlessly▲14

   2015 · chrome.google.com · its alternatives →

8. 8
   Ugly Email▲421

   See if an email is being tracked before you open it in Gmail

   2015 · uglyemail.com · its alternatives →

9. 9
   Mailcastr▲363

   Create email signature that can track your emails

   2017 · bulletbusiness.com · its alternatives →

10. 10
    Email Hunter for Chrome▲370

    Find all the emails related to a domain with just one click

    2015 · hunter.io · its alternatives →

11. 11
    SonarList.io▲90

    Unlimited professional email finder and validator

    2023 · its alternatives →

12. 12
    TraceMail▲100

    Know, don't guess when your emails are read

    2024 · its alternatives →

13. 13
    Mail Tracker▲8

    Free gmail email tracking

    2025 · mail-tracker.app · its alternatives →

14. 14
    Emailgurus - Open Source▲111

    Keep your Gmail inbox focused on people you know

    2022 · keepknown.com · its alternatives →

15. 15
    PromoTab▲154

    Check on which Gmail tab your email will land

    2021 · its alternatives →

16. 16
    Scary Senders▲123

    Detect spooky spy pixels in your emails

    2021 · encouragement.beyondco.de · its alternatives →

17. 17
    Web Monitoring by Visualping▲196

    Email alert when something changes on a webpage

    2017 · visualping.io · its alternatives →

18. 18
    E-Mail Tracker▲17

    Know when your emails are read, in a simple, convenient way.

    2019 · apps.apple.com · its alternatives →

19. 19
    Mailbutler 2.2 for Gmail▲119

    Enhance the new Gmail with a powerful, elegant add-on 💡

    2018 · chromewebstore.google.com · its alternatives →

20. 20
    Mail-Trail for Gmail▲74

    Auto-remind recipients about forgotten emails

    2014 · chromewebstore.google.com · its alternatives →

21. 21
    Creep Alert▲131

    Check if friends or colleagues track you via email

    2019 · its alternatives →

22. 22
    Gmail Email Read Receipt Tracker▲1

    Track when sent Gmail emails are opened with read receipts.

    Apr 2026 · chromewebstore.google.com · its alternatives →

23. 23
    Huntely▲109

    Get an email when a keyword is mentioned on Product Hunt.

    2016 · its alternatives →

24. 24
    WebhookBem▲100

    Track webhooks through push notifications

    2024 · webhookbeam.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →