Trieve is an AI-first infrastructure API that combines language models and tools for fine-tuning ranking and relevance, providing a one-stop solution for search, recommendations, RAG, and analytics. It can continuously improve automatically based on dozens of feedback signals, ensuring relevance. Trieve supports semantic vector search, BM25, and SPLADE full-text search, as well as hybrid search combining full-text and semantic vector searches. Additionally, it offers product promotion and relevance adjustment features to help users fine-tune search results via API or no-code dashboards to achieve KPIs. Built on the best foundations, it utilizes open-source embedding models and LLMs, running on its own servers to ensure data security.