[alx__]

Where have you heard this?

They build their own index: https://help.kagi.com/kagi/why-kagi/kagi-vs-competition.html

[J_Shelby_J]

They build their own index but don’t let you access it with keyword based queries. Instead the do ‘magic’ and shape the responses from multiple data sources.

I’d love it if instead of ‘magic’ we just had a search engine that let you be the magician with a better query language and ux filters.

[VHRanger]

They're probably doing something like mapping the embedding of the query to the nearest neighbor in the search given how the front-end of their search infra works