Link Integrity Monitoring for Publishers and Newsletters
C7/10May 9, 2026
WhatA SaaS that continuously monitors outbound links in newsletters, content sites, and link aggregators — testing the exact URLs as delivered to subscribers (including appended tracking params) and alerting publishers to breakage.
SignalA commenter describes how a major paid newsletter (The Browser) was unknowingly sending broken links to subscribers for an extended period because they only tested URLs before appending referral tracking strings, and users never reported the problem.
Why NowThe newsletter economy has exploded (Substack, Beehiiv, ConvertKit) with thousands of publishers sending millions of links daily, and the shift to URL-based tracking (as cookies die) means more parameters that can break destination sites.
MarketNewsletter publishers, content aggregators, affiliate marketers — anyone sending links at scale; TAM likely $200M+ given 50K+ active paid newsletters; competitors like Dead Link Checker don't test post-delivery URLs with tracking params.
MoatHistorical breakage data across thousands of destination sites builds a predictive model of which parameter/site combinations will fail — a unique dataset no competitor has.
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