Human Sender

Human Sender describes itself simply: "Cryptographic proof of human authorship for every digital communication. Human Sender lets anyone attach a one-time proof-of-effort token to any email, call, or message." To AI engines like ChatGPT and Perplexity, though, it is barely visible: it scores 4.3 out of 10.

On the page itself the strengths are clear: a clear heading structure and crawler access and the files AI engines look for. It is passable on some structured data, a partly stated business identity, a few credibility markers and partial sitemap and link coverage.

Off the page, almost no other sites link to it, the domain does not yet read as established, AI engines do not yet recognise it as a distinct business, there is no press coverage to draw on, nobody is discussing it where AI engines look and it does not come up on Reddit. Those are earned elsewhere on the web, not fixed on the site itself.

The site links to no social profiles, so there is nothing tying the brand to a wider presence.