We have some API-compatibility in faceted search. But yes, we are not (today) a drop-in replacement for ES. We have many migrations from ES/OpenSearch and users find that converting their code over is well worth the savings in maintenance, no-ETL and increased uptime, though.
That said, we may one day add ES API compatibility if we can :)
is there a place where I can read about what ParadeDB actually does? Surely you do more than just pre-install the extensions? Do you also develop the extensions yourself? Do you support RAG? The last question may not make sense as I am new to this space.
That said, we may one day add ES API compatibility if we can :)