k4i.net
K is standard shorthand for Kubernetes in technical writing, and infrastructure tooling is a market where short technical-sounding names are the norm. Kubernetes for infrastructure is the reading the extension supports best.
K4I also carries knowledge for innovation, standard in knowledge management circles and fitting research or corporate learning, and kits for industry.
The .net is entirely native for infrastructure and platform products, and it keeps a three-character name reachable when the .com equivalent would be in another price bracket altogether.
Three characters, established convention, and a technical extension matching the most likely buyer.
The name is listed for sale. Offers considered.