Vespa
the most sophisticated ranking engine here, with the steepest learning curve
a full search and ranking engine rather than a vector store — if ranking quality is your product, rank it second; if you just need rag, it's overkill.
vespa came out of yahoo and it shows in the best way: multi-phase ranking with real ranking expressions and machine-learned models is native, not an add-on. hybrid is not bm25 stapled to a vector index, it is a genuine tensor and ranking framework.
the pricing is the most transparent here — published per-vcpu, per-gb-memory, per-gb-disk and per-gb-gpu-memory hourly rates across four plan tiers, with unit prices declining as allocation grows and a discount for annual commitment.
the description above is ours, condensed from the ranking. pricing moves — check it on the vendor's own page before you rely on it.
- category
- vector databases
- pricing
- $0.05 per vCPU-hour on the startup plan
- website
- vespa.ai
a full search and ranking engine rather than a vector store — if ranking quality is your product, rank it second; if you just need rag, it's overkill.
we researched this category against vendors' own pricing pages and licence files. that is where this line comes from — not from the vendor, and not from anything they paid for.