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2:Tbef,{"@context":"https://schema.org","@graph":[{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://mailshade.org/"},{"@type":"ListItem","position":2,"name":"Compare","item":"https://mailshade.org/compare/"},{"@type":"ListItem","position":3,"name":"Mailshade and Gblock compared","item":"https://mailshade.org/compare/mailshade-vs-gblock/"}]},{"@type":"Article","headline":"Mailshade and Gblock compared","description":"Compare Mailshade 1.1.0 with Gblock 0.4.0 using current official sources. Pixel, link and privacy approaches are documented; testing is pending.","inLanguage":"en","image":"https://mailshade.org/og/compare/mailshade-vs-gblock.png","mainEntityOfPage":"https://mailshade.org/compare/mailshade-vs-gblock/","author":{"@type":"Organization","name":"Mailshade","url":"https://mailshade.org"},"publisher":{"@type":"Organization","name":"Mailshade","url":"https://mailshade.org"},"dateModified":"2026-08-21","isBasedOn":"https://mailshade.org/guide/how-to-audit-an-email-tracker-blocker/","citation":["https://chromewebstore.google.com/detail/mailshade/opdjbaphkkfkngiaafcdaommanebfamn","https://mailshade.org/source/","https://chromewebstore.google.com/detail/gblock-%E2%80%94-block-email-trac/jlnjoejlgadiipndbpilnicleimjfhcb"],"about":[{"@type":"SoftwareApplication","name":"Mailshade","softwareVersion":"1.1.0","url":"https://chromewebstore.google.com/detail/mailshade/opdjbaphkkfkngiaafcdaommanebfamn"},{"@type":"SoftwareApplication","name":"Gblock","softwareVersion":"0.4.0","url":"https://chromewebstore.google.com/detail/gblock-%E2%80%94-block-email-trac/jlnjoejlgadiipndbpilnicleimjfhcb"}]},{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Does Gblock protect tracking links as well as pixels?","acceptedAnswer":{"@type":"Answer","text":"Its official listing says it strips known tracking parameters and can use a proxy to resolve tracked links while masking the user's IP address."}},{"@type":"Question","name":"Does Gblock work outside Gmail?","acceptedAnswer":{"@type":"Answer","text":"The current listing describes Gblock as a Gmail privacy extension. Mailshade declares opt-in support for six webmail integrations, but comparative tested coverage is pending."}},{"@type":"Question","name":"Does Gblock use a server?","acceptedAnswer":{"@type":"Answer","text":"Its listing says unknown tracker detections are reported to its server and that a proxy can follow tracked links. Mailshade documents local core history and local handling for supported link patterns."}},{"@type":"Question","name":"Is Gblock free?","acceptedAnswer":{"@type":"Answer","text":"The official listing states that Gblock has a 30-day free trial with no card and requires a paid subscription afterward."}},{"@type":"Question","name":"Which architecture protects privacy better?","acceptedAnswer":{"@type":"Answer","text":"No overall conclusion is claimed yet. That requires observable network evidence, documented settings and a clear treatment of the different proxy and local-only paths."}}]}]}0:{"rsc":["$","$1","c",{"children":[["$","main",null,{"className":"container-x py-16","children":[["$","script",null,{"type":"application/ld+json","dangerouslySetInnerHTML":{"__html":"$2"}}],["$","article",null,{"className":"prose prose-ink max-w-none","children":["$L3","$L4","$L5","$L6","$L7","$L8"]}]]}],null,"$L9"]}],"isPartial":false,"staleTime":300,"varyParams":null,"buildId":"mailshade-static-v1"}
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a:T4e7,Gblock 0.4.0 is a Gmail-focused commercial product with a broader advertised feature set than the previous version of this page acknowledged. Its Chrome Web Store listing says it blocks tracking pixels, strips known tracking parameters, follows tracked links through a proxy to mask the user's IP address, and reports newly detected trackers to its server so future messages can be blocked. The listing offers a 30-day free trial and then requires a paid subscription. Mailshade 1.1.0 instead declares six opt-in webmail integrations, blocks requests to reviewed tracker endpoints through Chrome declarativeNetRequest, handles supported tracking redirects locally with a direct-or-original choice, and keeps detection history locally for sender-level reports. Mailshade also makes AGPL-3.0-or-later source archives and checksums available; reviewers must match an archive to the exact tested package version. These are materially different architectures: Gblock advertises a proxy and server-assisted tracker discovery, while Mailshade emphasizes local processing and broader webmail scope. Neither architecture is automatically superior. Comparative efficacy, latency, false positives and privacy behavior remain pending a shared test and network review.4:["$","p",null,{"className":"text-lg text-ink-200","children":"$a"}]
5:["$","section",null,{"aria-labelledby":"comparison-record","className":"my-10 rounded-2xl border border-ink-500 bg-ink-800 p-6","children":[["$","div",null,{"className":"flex flex-wrap items-start justify-between gap-3","children":[["$","div",null,{"children":[["$","h2",null,{"id":"comparison-record","className":"m-0 text-xl","children":"Comparison record"}],["$","p",null,{"className":"mt-2 text-sm text-ink-200","children":["Facts reviewed on"," ",["$","time",null,{"dateTime":"2026-08-21","children":"2026-08-21"}],"."]}]]}],["$","span",null,{"className":"rounded-full px-3 py-1 text-xs font-semibold uppercase tracking-wide bg-ink-600 text-ink-100","children":["Result: ","pending"]}]]}],["$","dl",null,{"className":"mt-6 grid gap-5 md:grid-cols-2","children":[["$","div",null,{"children":[["$","dt",null,{"className":"text-sm font-semibold text-ink-100","children":"Test date"}],["$","dd",null,{"className":"mt-1 text-sm text-ink-200","children":"Not yet tested; no performance winner is claimed."}]]}],["$","div",null,{"children":[["$","dt",null,{"className":"text-sm font-semibold text-ink-100","children":"Methodology"}],["$","dd",null,{"className":"mt-1 text-sm text-ink-200","children":["$","a",null,{"href":"https://mailshade.org/guide/how-to-audit-an-email-tracker-blocker/","children":"Read the published method"}]}]]}]]}],["$","h3",null,{"className":"mt-7 text-base","children":"Versions in scope"}],["$","ul",null,{"className":"mt-3 grid gap-2 md:grid-cols-2","children":[["$","li","Mailshade-1.1.0",{"className":"text-sm","children":[["$","a",null,{"href":"https://chromewebstore.google.com/detail/mailshade/opdjbaphkkfkngiaafcdaommanebfamn","children":"Mailshade"}],": ","1.1.0",["$","span",null,{"className":"text-ink-300","children":[" — ","Current public Chrome Web Store version confirmed on 2026-08-19."]}]]}],["$","li","Gblock-0.4.0",{"className":"text-sm","children":[["$","a",null,{"href":"https://chromewebstore.google.com/detail/gblock-%E2%80%94-block-email-trac/jlnjoejlgadiipndbpilnicleimjfhcb","children":"Gblock"}],": ","0.4.0",null]}]]}],["$","h3",null,{"className":"mt-7 text-base","children":"Method and current result"}],["$","p",null,{"className":"mt-2 text-sm text-ink-200","children":"Each pinned extension must run in a clean Chrome profile against the same versioned pixel, link and benign-content fixtures before comparative performance is stated."}],["$","p",null,{"className":"mt-2 text-sm text-ink-200","children":"The products' different local, proxy and server-assisted designs are sourced, but protection efficacy and privacy conclusions await a shared observable test."}],null,"$undefined",["$","h3",null,{"className":"mt-7 text-base","children":"Claim evidence"}],["$","ul",null,{"className":"mt-3 space-y-3","children":[["$","li","Gblock 0.4.0 advertises Gmail pixel blocking, link-parameter stripping, proxy resolution and server-assisted tracker discovery.-0",{"className":"text-sm text-ink-200","children":[["$","span",null,{"className":"font-semibold text-ink-100","children":["[","verified","]"]}]," ","Gblock 0.4.0 advertises Gmail pixel blocking, link-parameter stripping, proxy resolution and server-assisted tracker discovery.",["$","span",null,{"children":[" ",[["$","span","https://chromewebstore.google.com/detail/gblock-%E2%80%94-block-email-trac/jlnjoejlgadiipndbpilnicleimjfhcb",{"children":["",["$","a",null,{"href":"https://chromewebstore.google.com/detail/gblock-%E2%80%94-block-email-trac/jlnjoejlgadiipndbpilnicleimjfhcb","children":["source ",1]}]]}]]]}],""]}],["$","li","Mailshade 1.1.0 is the current public Chrome Web Store version, confirmed on 2026-08-19, and documents local core history plus opt-in webmail access. Source archives and checksums are available separately and must be matched to the exact tested package version.-1",{"className":"text-sm text-ink-200","children":[["$","span",null,{"className":"font-semibold text-ink-100","children":["[","verified","]"]}]," ","Mailshade 1.1.0 is the current public Chrome Web Store version, confirmed on 2026-08-19, and documents local core history plus opt-in webmail access. Source archives and checksums are available separately and must be matched to the exact tested package version.","$Lb",""]}],"$Lc"]}],"$Ld","$Le","$Lf"]}]
10:T5d2,<h2>What Gblock documents</h2><p>Gblock's official listing names Gmail, tracking-pixel blocking, known-parameter removal, a proxy for tracked links and automated discovery that reports unknown trackers to its server. It also states that proxy use can be disabled and that the product requires payment after a 30-day trial.</p><h2>What Mailshade documents</h2><p>Mailshade declares six opt-in webmail integrations, reviewed endpoint DNR blocking, local link-pattern handling and local sender-level detection history. Mailshade separately makes source archives and checksums available; reviewers must match an archive to the exact tested package version.</p><h2>The central trade-offs</h2><ul><li><strong>Coverage:</strong> Gblock is documented for Gmail; Mailshade declares several webmail integrations.</li><li><strong>Link handling:</strong> Gblock advertises parameter stripping and proxy resolution; Mailshade advertises local recognition with a user choice.</li><li><strong>Tracker discovery:</strong> Gblock advertises server reports for newly detected trackers; Mailshade's core history and matching path are local.</li><li><strong>Price:</strong> Gblock's listing requires a subscription after its trial; Mailshade documents a free core tier with optional paid features.</li></ul><h2>What is not yet known</h2><p>The same controlled corpus has not yet measured blocking recall, proxy behavior, latency or benign-link breakage. No winner is claimed while that evidence is pending.</p>6:["$","div",null,{"className":"comparison-copy","dangerouslySetInnerHTML":{"__html":"$10"}}]
7:["$","section",null,{"className":"mt-12","children":[["$","h2",null,{"children":"FAQ"}],[["$","details","0",{"className":"my-3","children":[["$","summary",null,{"className":"font-medium","children":"Does Gblock protect tracking links as well as pixels?"}],["$","p",null,{"className":"mt-2","children":"Its official listing says it strips known tracking parameters and can use a proxy to resolve tracked links while masking the user's IP address."}]]}],["$","details","1",{"className":"my-3","children":[["$","summary",null,{"className":"font-medium","children":"Does Gblock work outside Gmail?"}],["$","p",null,{"className":"mt-2","children":"The current listing describes Gblock as a Gmail privacy extension. Mailshade declares opt-in support for six webmail integrations, but comparative tested coverage is pending."}]]}],["$","details","2",{"className":"my-3","children":[["$","summary",null,{"className":"font-medium","children":"Does Gblock use a server?"}],["$","p",null,{"className":"mt-2","children":"Its listing says unknown tracker detections are reported to its server and that a proxy can follow tracked links. Mailshade documents local core history and local handling for supported link patterns."}]]}],["$","details","3",{"className":"my-3","children":[["$","summary",null,{"className":"font-medium","children":"Is Gblock free?"}],["$","p",null,{"className":"mt-2","children":"The official listing states that Gblock has a 30-day free trial with no card and requires a paid subscription afterward."}]]}],["$","details","4",{"className":"my-3","children":[["$","summary",null,{"className":"font-medium","children":"Which architecture protects privacy better?"}],["$","p",null,{"className":"mt-2","children":"No overall conclusion is claimed yet. That requires observable network evidence, documented settings and a clear treatment of the different proxy and local-only paths."}]]}]]]}]
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c:["$","li","Relative efficacy, false positives, proxy latency and observed data flows remain unmeasured under the shared method.-2",{"className":"text-sm text-ink-200","children":[["$","span",null,{"className":"font-semibold text-ink-100","children":["[","pending","]"]}]," ","Relative efficacy, false positives, proxy latency and observed data flows remain unmeasured under the shared method.",false,""]}]
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f:["$","aside",null,{"className":"mt-7 border-l-2 border-accent-500 pl-4 text-sm text-ink-200","children":[["$","strong",null,{"className":"text-ink-100","children":"Conflict disclosure:"}]," ","This page is published by Mailshade's developer. Competitor facts come from the linked first-party sources, and comparative performance remains unclaimed until reproducible raw results are public."]}]
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