LinkCleanr (email)

Who it's for

privacy-conscious consumers and journalists who now use Gmail (web/mobile) or Apple Mail and currently cope by manually inspecting links, using generic adblockers, or forwarding to text-only readers.

The problem

time and privacy harms: users waste minutes per email to verify links or risk click-tracking and cross-site ad profiling; journalists fear source exposure via tracking pixels/redirects.

How to build it

Browser extension for Chrome/Firefox/Safari that rewrites links in-place on webmail; companion hosted rewrite endpoint for mobile mail clients (optional, paid) that fetches and rewrites HTML then returns sanitized MIME; UI: per-message panel listing stripped tracker domains and a 1-click 'Unsubscribe + Report' button that opens pre-filled unsubscribe emails/forms.

How it makes money

Paid by users on a consumer subscription for the hosted rewrite/mobile support and cloud unsubscribe/complaint automation (~$3–$6/mo), and a $50/yr pro tier for journalists/orgs that need guaranteed on-demand rewrite API and CSV audit exports; they pay because free adblockers don't sanitize many email-specific trampolines and the hosted option is needed for mobile clients that lack extension support.

Why it doesn't exist yet

Incumbents (email providers) avoid link-rewriting because they monetize link data and must balance deliverability/ML features; generic adblockers can't reliably rewrite every email-trampoline format and mobile clients often disallow extensions. An indie can ship by focusing narrowly on HTML-email link patterns and a small, high-quality ruleset + lightweight hosted fetcher for clients that block extensions.

First users

privacy-focused journalists, security researchers, and power Gmail users will try it to stop invisible tracking in tip emails and reduce ad-targeting; they'll share on Mastodon/Hacker News and in privacy newsletters because it produces immediate, visible benefits (clean links + tracker list) and a reproducible 'unsubscribe+report' workflow.

Build size

2 people x 8 weeks (1 frontend engineer to implement extension UI + link-rewrite logic and Safari port; 1 backend engineer to implement optional hosted fetcher, caching, unsubscribe automation, and a small rules dashboard). Includes: link parsing rules, extension UI, hosted rewrite API, basic analytics and billing. Excludes: building full IMAP server, enterprise SSO, or large-scale newsletter deliverability tools.

Biggest risk

Major email providers (Google/Apple/Microsoft) ship native email link-sanitization or block host-side rewriting, or they change webmail DOMs to make reliable rewriting impossible.

Conditions for a hit (all 3 required)

• Per-open: for any opened HTML email, show a verifier panel that lists up to 20 tracker domains found (by matching known trampoline domains and common tracking query params) with counts, within 1s of opening.
• Rewrite output: replace each tracked/trampoline link inline with the cleaned direct destination URL (when resolvable within 3s), and mark percentage cleaned (e.g., '12/15 links cleaned').
• Unsubscribe bundle: produce a downloadable ZIP containing a pre-filled unsubscribe email (To: address, Subject, and body), a one-page PDF enumerating trackers/domains found with timestamps, and a one-click API that files a complaint to a major regulator or mailing list provider when available, completed within 10s of click.

How it's judged (in 6 months)

Product Hunt daily top 5 OR GitHub 1,000+ stars (either) within 6 months(judgment date 2027-02-17)

AI self-confidence 55/100 — self-reported likelihood of meeting the criterion, not a business success rate