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.
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

Get release notes by email

One short email per release: what was added, what broke, what got faster. No sales drip — just the changelog delivered to your inbox so you don’t have to check the page.