Azure Cosmos DB is Microsoft's fully managed, globally distributed, multi-model NoSQL and vector database service for building high-performance, scalable applications including AI-powered experiences.

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🚀 Overview

Azure Cosmos DB is a fully managed NoSQL database service that delivers turnkey global distribution, single-digit millisecond latency at the 99th percentile, and elastic scalability. It solves the problem of managing infrastructure for globally distributed applications while providing guaranteed performance SLAs for availability (99.999%), latency, and throughput.

It is built for developers, enterprises, and teams creating modern apps that require low-latency access to data across the world, multi-model support (NoSQL, MongoDB, Cassandra, etc.), and now AI features like vector search for RAG and agentic apps.

Microsoft built it to simplify building planet-scale applications without operational overhead, enabling faster innovation with integrated AI capabilities like built-in vector and hybrid search.

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✨ Key Features

• Built-in vector search powered by DiskANN for efficient storage and querying of vectors in AI apps

• Hybrid search combining vector similarity and full-text (BM25) for more relevant results

• Global distribution with multi-region writes, automatic failover, and low-latency reads/writes

• Multiple consistency models and APIs (NoSQL/SQL, MongoDB, Cassandra, Gremlin, Table, PostgreSQL)

• Serverless/serverless autoscale, provisioned throughput, and Global Secondary Indexes for optimization

Optional: Ongoing enhancements for AI agents and multi-tenant fleets

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🛠 Tech Stack

• Frontend: Azure Portal (React.js)

• Backend: Azure Cosmos DB proprietary engine

• Database: Azure Cosmos DB (multi-model NoSQL, supports JSON documents)

• Auth: Microsoft Entra ID (formerly Azure AD)

• Hosting: Microsoft Azure global data centers

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👥 Who Is This For?

This project is useful for:

• Developers who want to build scalable, low-latency global applications without infrastructure management

• Teams looking for a fully managed database with AI vector capabilities for RAG and copilots

• Indie makers and enterprises modernizing apps with Azure services like OpenAI and Kubernetes

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📸 Screenshots / Demo

• Live demo: https://cosmos.azure.com/try

• GitHub: https://github.com/AzureCosmosDB

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🔥 Project Status

• 🟢 Actively building

Last updated: 2026-03-24

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❓ FAQ

Is this project free?

Freemium — Free tier provides 1,000 RU/s throughput and 25 GB storage free for the lifetime of the account. Additional usage is pay-as-you-go.

(Explain briefly.)

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Is the source code available?

No — explain why

Core service is proprietary Microsoft service. Open-source SDKs, samples, and tools available on GitHub: https://github.com/AzureCosmosDB

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Can I contribute?

Yes — Contribute to SDKs, samples, labs, and documentation through GitHub issues, PRs, and feedback in developer forums.

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📬 Contact & Links

• Website: https://azure.microsoft.com/en-us/products/cosmos-db

• GitHub: https://github.com/AzureCosmosDB

• Twitter/X: https://x.com/AzureCosmosDB

• Email: Use Azure support portal or community forums

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