[jabo]

I hate to be that guy, but if you’re looking for an open source alternative to Algolia, Typesense is another alternative to consider: https://github.com/typesense/typesense

It doesn’t have fancy “AI” features, but has all the other fundamentals for fast and performant search covered, including UI components.

[winxton]

Meilisearch (https://github.com/meilisearch/MeiliSearch) is another fast open source alternative, written in rust.

[brainless]

You could also look at Sonic - https://github.com/valeriansaliou/sonic. This is used at Crisp, the customer messaging platform.