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
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Track opens and clicks, set reminders and delays in Gmail
2019 · its alternatives →
- 3
- 4
Track email opens, know which emails are opened by recipient
2021 · its alternatives →
- 5
Know when and where your emails are read
2017 · its alternatives →
- 6
- 7
- 8
- 9
Find all the emails related to a domain with just one click
2015 · its alternatives →
- 10
- 11ET
2015 · chrome.google.com · its alternatives →
- 12
- 13
- 14
Keep your Gmail inbox focused on people you know
2022 · its alternatives →
- 15
- 16
- 17
Email alert when something changes on a webpage
2017 · its alternatives →
- 18
Make Gmail easier to read and manage.
Mar 2026 · chromewebstore.google.com · its alternatives →
- 19
Enhance the new Gmail with a powerful, elegant add-on 💡
2018 · its alternatives →
- 20
- 21
- 22
- 23
Track when sent Gmail emails are opened with read receipts.
Apr 2026 · chromewebstore.google.com · its alternatives →
- 24
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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 →