Also from last year: "rather than try to build a search infrastructure from scratch, Neeva instead opted to use Bing's search API for its basic result"[0]. I thought that was a huge missed opportunity because you could build a pretty good search index of your own from scratch with $77.5M[1] in funding. But it wasn't clear if that was their plan for the long term.

[0] https://www.protocol.com/neeva-search

[1] https://www.crunchbase.com/organization/neeva