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+# Azure Cosmos DB
+
+> "OpenAI relies on Cosmos DB to dynamically scale their ChatGPT service – one of the fastest-growing consumer apps ever – enabling high reliability and low maintenance."
+> – Satya Nadella, Microsoft chairman and chief executive officer
+
+[Azure Cosmos DB](https://learn.microsoft.com/en-us/azure/cosmos-db/introduction) is a fully managed [NoSQL](https://learn.microsoft.com/en-us/azure/cosmos-db/distributed-nosql), [relational](https://learn.microsoft.com/en-us/azure/cosmos-db/distributed-relational), and [vector database](https://learn.microsoft.com/azure/cosmos-db/vector-database). It offers single-digit millisecond response times, automatic and instant scalability, along with guaranteed speed at any scale. Your business continuity is assured with up to 99.999% availability backed by [SLA](https://azure.microsoft.com/support/legal/sla/cosmos-db). Azure Cosmos DB simplifies and expedites your application development by being the single database for your operational data needs, from caching to backup to vector search. It provides the data infrastructure for modern applications like AI, digital commerce, Internet of Things, and booking management. Its various [APIs](https://learn.microsoft.com/en-us/azure/cosmos-db/choose-api) allow you to keep all your operational data models, including relational, document, vector, key-value, graph, and table, in one database service.
+
+- [Try Azure Cosmos DB free](https://learn.microsoft.com/en-us/azure/cosmos-db/try-free)
+- [Use Azure Cosmos DB lifetime free tier](https://learn.microsoft.com/en-us/azure/cosmos-db/free-tier)