Ten Chrome email tracker blockers reviewed
This overview records ten current Chrome products that advertise receiving-side email tracker detection or blocking. The strict multi-webmail cohort currently contains Mailshade, Trocker and Email Tracker + Pixelblock Detector & Blocker, but the third product's free/default tier is detector-only and its blocker is a paid Pro feature. Ugly Email, PixelBlock, Gblock, Klopio, cloudHQ, GMass Tracker Blocker and XMail focus on Gmail. Official listings establish versions, scope and tier claims; they do not prove blocking recall, link protection, false positives or reliability. User counts and ratings are excluded because they change frequently and are not efficacy measurements. No product is named the category leader while the shared controlled benchmark is pending. The dated record below pins the versions and sources that must be used for the next run, and the public method explains exactly what must be observed before a verified result can replace this provisional overview.
Comparison record
Facts reviewed on .
- Test date
- Not yet tested; no performance winner is claimed.
- Methodology
- Read the published method
Versions in scope
- Mailshade: 1.1.0 — Current public Chrome Web Store version confirmed on 2026-08-19. Mailshade Shield is an unreleased successor candidate and is not included in this record.
- Trocker: 3.4.1
- Email Tracker + Pixelblock Detector & Blocker: 5.0.58 — Free/default is detector-only; inbound blocking is listed as a paid Pro feature.
- Ugly Email: 4.1.2 — Version recorded from the official source repository.
- PixelBlock: 2025.12.01
- Gblock: 0.4.0
- Klopio: 1.2
- cloudHQ Email Privacy Protector: 1.0.2.3
- GMass Tracker Blocker: 2.0.1 — Gmail-only reference focused on GMass tracking pixels.
- XMail: 1.3.7 — Gmail-only reference.
Method and current result
Each pinned extension must run in a clean Chrome profile against the same versioned pixel, link and benign-content fixtures before comparative performance is stated.
This is a dated source review of ten products, not a performance ranking; only active multi-webmail blocker tiers can enter the category cohort, and no leader is claimed before public raw benchmark results.
Claim evidence
- [verified] Ten currently sourced products advertise a receiving-side email tracker detection or blocking feature for Chrome. source 1, source 2, source 3, source 4, source 5, source 6, source 7, source 8, source 9, source 10
- [verified] Email Tracker + Pixelblock Detector 5.0.58 lists active blocking as a paid Pro feature; its free/default tier is detector-only and cannot be ranked as an active blocker. source 1, source 2
- [pending] A category-wide performance result remains pending until all eligible pinned builds complete the shared corpus.
Sources
- Mailshade Chrome Web Store listing, Mailshade; accessed .
- Mailshade versioned source and checksums, Mailshade; accessed .
- Trocker Chrome Web Store listing, Trocker; accessed .
- Email Tracker + Pixelblock Detector listing, Email Tracker; accessed .
- Email Tracker Pro feature page, Email Tracker; accessed .
- Ugly Email package version, OneClick Lab; accessed .
- PixelBlock Chrome Web Store listing, PixelBlock; accessed .
- Gblock Chrome Web Store listing, Gblock; accessed .
- Klopio Chrome Web Store listing, Klopio; accessed .
- cloudHQ Email Privacy Protector listing, cloudHQ; accessed .
- GMass Tracker Blocker listing, GMass; accessed .
- XMail Gmail Pixel Blocker listing, XMail; accessed .
Publisher-stated scope at a glance
| Product | Stated webmail scope | Stated receiving-side features | Public source link |
|---|---|---|---|
| Mailshade 1.1.0 current-public; confirmed 2026-08-19 | Gmail, Outlook, Office 365, Superhuman, Yahoo, Proton Mail | Free opt-in endpoint blocking, indicators, link warnings, sender reports | Yes |
| Trocker 3.4.1 | Known trackers broadly; enhanced Gmail, Yahoo, Outlook.com | Pixel blocking, exposure, heuristics, tracked-link handling, statistics | Yes |
| Email Tracker + Pixelblock Detector 5.0.58 | Gmail, Outlook, Hotmail, Office 365, Yahoo | Free/default detector; receiving-side blocker is a paid Pro feature; also offers sender-side tracking | Official listing and Pro page |
| Ugly Email 4.1.2 | Gmail | Pixel detection, blocking, eye marker, local storage | Yes |
| PixelBlock 2025.12.01 | Gmail | Pixel blocking and red-eye marker | Official listing |
| Gblock 0.4.0 | Gmail | Pixel blocking, link cleaning, proxy resolution, tracker discovery | Official listing |
| Klopio 1.2 | Gmail | Pixel blocking, tracker identity, pre-open badges, weekly reports | Official listing |
| cloudHQ Email Privacy Protector 1.0.2.3 | Gmail | Pixel blocking, shield indicator and per-message unblock choice | Official listing |
| GMass Tracker Blocker 2.0.1 | Gmail | Blocks GMass tracking pixels | Official listing |
| XMail 1.3.7 | Gmail | Pixel blocking and sender notification controls | Official listing |
The table repeats publisher claims from the linked sources. It is not a pass table. Mailshade Shield is an unreleased successor candidate and is excluded from this current-public record.
Direct multi-webmail cohort
Mailshade and Trocker advertise active blocking in free tiers. Email Tracker + Pixelblock Detector & Blocker is a hybrid whose free/default tier detects but does not provide its paid blocker. The benchmark therefore records that free tier as a reference, not as an active blocker candidate; a paid Pro run would need a separate setup and disclosure.
Focused Gmail references
Ugly Email and PixelBlock emphasize a simple in-inbox marker. Gblock advertises proxy and server-assisted discovery. Klopio advertises identity and weekly reporting. cloudHQ advertises a free blocker with an explicit unblock action. GMass Tracker Blocker is vendor-specific, while XMail advertises a broader Gmail pixel blocker. Their narrower scope does not imply weaker Gmail efficacy, but it excludes them from the multi-webmail category.
What determines a verified result
The shared corpus measures network blocking, detection, link behavior, benign content and actually exercised clients. Unavailable setup is recorded as inconclusive, not as a zero. A winner can be stated only after the raw result file, environment and pinned current-public versions are public.
FAQ
Which products in this overview advertise multiple webmails?
Mailshade, Trocker and Email Tracker + Pixelblock Detector & Blocker advertise multi-webmail receiving-side behavior. The third product's current free/default tier is detector-only; its active blocker is a paid Pro feature.
Which products focus on Gmail?
Ugly Email, PixelBlock, Gblock, Klopio, cloudHQ Email Privacy Protector, GMass Tracker Blocker and XMail describe Gmail-focused protection in their official sources.
Why is Email Tracker + Pixelblock Detector included?
Its official listing advertises several webmails, but its official Pro page and packaged default configuration separate the free detector from the paid blocker. The free/default run is therefore a reference; only a separately tested Pro run could qualify as an active blocker candidate.
Why does this page not name a category leader yet?
The shared benchmark is not complete. Official feature claims and store ratings do not establish relative blocking efficacy or false-positive rates.
Will a Gmail-only product automatically score below a multi-webmail product?
No. Client coverage is reported separately from efficacy. A focused Gmail product can perform strongly on Gmail without receiving credit for clients it does not claim or that were not tested.
How can I verify corrections to this overview?
Use the dated sources and claim statuses in the comparison record. Future measured conclusions must also link a test date and raw results under the published method.