Choose Redis when: You need very fast search on a relatively small dataset. Your search patterns are simple and well-defined. You're already using Redis as you

Choose Redis when: You need very fast search on a relatively small dataset. Your search patterns are simple and well-defined. You're already using Redis as your primary database. Low latency is critical. Choose Elasticsearch when: You have large amounts of text data. You need advanced search features and relevance tuning. Your data is semi-structured or unstructured. You need sophisticated analytics capabilities. Scalability is a primary concern