Rad Letters

"Rad Letters is a list of thought-provoking newsletters for those interested in tech, business, science, innovation, productivity, entrepreneurship, marketing, design, data, and more." That is how Rad Letters introduces itself. To AI engines like ChatGPT and Perplexity it is partially visible, scoring 5.5 out of 10, readable in places and missing in others.

On the page it is passable on partial sitemap and link coverage. What holds it back is a heading structure that lays out what it offers, a clearly stated business identity, credibility markers like credentials or reviews, structured data describing the business and the technical files AI engines look for, such as llms.txt or an open robots.txt.

Away from its own site, other sites link to it and people discuss it in places AI engines read. There is some, but not much, sign that the domain is only lightly established. Beyond that, AI engines do not yet recognise it as a distinct business, there is no press coverage to draw on and it does not come up on Reddit. Those are earned elsewhere on the web, not fixed on the site itself.

AI crawlers have visited once in our tracking, including ClaudeBot (Anthropic).