Block email tracking pixels and see who tried to track you

Mailshade is an open-source browser extension that strips tracking pixels from your inbox before they load, unwraps click-tracking redirect links, and gives you a clear dashboard of every sender that tried to spy on you opening an email.

Works in Gmail, Outlook, Office 365, Superhuman, Yahoo & ProtonMail.
Local-first — no analytics, no servers handling your inbox.
Open source under AGPL-3.0, audit the code on GitHub.

See pricing View source on GitHub

Animated demo: a tracker pixel appears in an inbox row, then a red eye icon reveals the blocked tracker domain. — Eye icon reveals the blocked tracker domain on every flagged message.

How Mailshade compares

Capability matrix hand-verified against each competitor’s Chrome Web Store listing, GitHub repository and most recent release notes. Where a competitor’s stance is unclear we mark the cell with an em dash — we will not invent features they do not ship.

Capability comparison of Mailshade against Ugly Email, PixelBlock, Trocker and Gblock.
Extension	Webmail coverage	Dashboard / reporting	Click-link unwrapping	MV3-native	Open source	Active in 2026
Mailshade	Gmail, Outlook, Office 365, Superhuman, Yahoo, ProtonMail	Yes — blocked-event log, sender breakdown, 30-day chart	Yes — 35 tracker patterns (Mailchimp, t.co, HubSpot, …)	Yes — declarativeNetRequest	Yes (AGPL-3.0)	Yes
Ugly Email [1]	Gmail only	Eye-icon flag, no dashboard	No	Partial	Yes (MIT)	Maintenance has stalled †
PixelBlock [2]	Gmail only	Red eye icon, no dashboard	No	Breaks on MV3 transition †	No	Updates inconsistent †
Trocker [3]	Gmail, Outlook (partial), Yahoo	Shield icon + per-message count	Yes	Yes	Yes (MIT)	Yes
Gblock [4]	Gmail only	Basic count + IP-proxy stats (Pro)	Yes (strip + IP hiding in Pro)	Yes	No	Yes

Sources last verified on 2026-05-21: [1] Ugly Email — Chrome Web Store, [2] PixelBlock — Chrome Web Store, [3] Trocker — Chrome Web Store, [4] Gblock landing. † Cells marked † carry our best read of the public listing on 2026-05-21; treat as “unconfirmed”.

Pricing

One-time or subscription, your call. All tiers include every feature. 30-day no-questions refund. Payments handled by Polar as Merchant of Record.

Founders — first 1000

Founders Lifetime

$19one-time

Lifetime updates. Locked when 1000 founder seats sell out.

1000-license launch cap

Buy Founders

Lifetime

$59one-time

Lifetime updates. Standard tier after founders run out.

Buy Lifetime

Annual

$29per year

Roughly $2.42/month. Auto-renew, cancel any time.

Buy Annual

Monthly

$3.99per month

Lowest commitment, easiest way to try.

Buy Monthly