UnseenA free Gblock alternative
Prices checked November 2, 2026. Written by the developer of Unseen, one of the options below.
Gblock is a well-made, actively developed Gmail extension. After a 30-day trial it costs $1.99 a month or $23.88 a year. If what you want is for senders to stop seeing when you open their emails, you don't have to pay a subscription for that.
| Gblock | Unseen | Trocker | |
|---|---|---|---|
| Blocks tracking pixels | Yes | Yes, free | Yes, free |
| Cleans tracked links | Yes | Pro, $15 once | Yes, free |
| Price | $1.99/month after trial | Free; Pro $15 once | Free |
| Open source | No | Yes (MIT) | Yes (Apache-2.0) |
| Can access | Gmail | Gmail only | All websites |
When Gblock is the better choice
If you want a commercial product with support, and features beyond blocking, a subscription can be worth it. We'd rather you pick the right tool than ours.
When a free one is enough
If you mainly want pixels blocked, Unseen does that free, for good, shows which company tried to track each email, and its code is public. Trocker is free too and also cleans links, with access to all websites.
Add Unseen to Chrome, free Firefox
Not sure an email is tracked at all? Paste it into the email tracker checker. · Full comparison of Gmail tracker blockers