s3h.com
The entire three-character .com inventory amounts to a few tens of thousands of strings, most registered before the current generation of companies existed and most held ever since. That’s the market in one sentence.
S3H uses the letter-digit-letter pattern, which reads cleanly and types fast on any keyboard without a shift key. The S3 opening carries a strong association with object storage among cloud engineers, giving it an immediate angle for anything in infrastructure, hosting or developer tooling. As a CLI name, an API host or a company identity it needs no adaptation.
The wider case doesn’t depend on that reading. Companies buy at this length so that one address serves as the website, the email domain, the status page, the documentation host and the short-link service without compromise in any of them.
Short .com is the one corner of this market where supply genuinely cannot expand.
Serious offers only.