Hiperspace is an acronym for “high performance space”, it provides higher performance than conventional database/object storage but accessed transparently as if data was already in memory. The name is similar to hyperspace in science fiction (a way to reduce the latency moving from open point is space to another), hyperlink in the World-Wide-Web (transparent navigation from one page to another), and the Hiperspace expanded memory for IBM mainframes.
It's not called HiperspaceDB because it is also applicable to ephemeral use cases that don’t need durable storage, but need access to be faster than reloading everything whenever it changes, or alternate views (Graph/History) without explicit handling:
The runtime is pure open-source GitHub and can be deployed from Nuget.