If you're just getting started with search, you might be comparing the popular #elasticsearch and the powerful #VespaAI - particularly if you've read some recent comparisons showing how the latter can be faster..so you'll be looking for a simple 'getting started' guide - you know, throw in some simple documents, run a search or two. The difference between each is very apparent - here's #Elasticsearch https://elastic.co/guide/en/elasticsearch/reference/current/getting-started.html and here's #VespaAI https://docs.vespa.ai/en/tutorials/text-search.html - much, much longer and to my eye more complex and potentially off-putting for the beginner. Sure, Vespa has some amazingly powerful features and a solid heritage but I think until they make the onboarding experience way easier they'll struggle to drive adoption. Elastic's strength was always how quick & easy it was to start with compared to the incumbent #Solr.