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Databases & Realtime
MongoDB
Latestv8.3.4Updated Jun 15, 2026
Overview
MongoDB is a source-available, cross-platform, document-oriented database program. Classified as a NoSQL database product, MongoDB uses JSON-like documents with optional schemas. Released in February 2009 by 10gen, it supports features like sharding, replication, and ACID transactions. MongoDB Atlas, its managed cloud service, operates on AWS, Google Cloud Platform, and Microsoft Azure. Current versions are licensed under the Server Side Public License (SSPL). MongoDB is a member of the MACH Alliance.
Read moreHow it works
js
db.apps.find({ rating: { $gte: 4.5 } })
.sort({ installs: -1 });The flow
Step by step, from source to running.
- 1App sends BSON documents
- 2Stored in schemaless collections
- 3Indexes speed up queries
- 4Replica set keeps copies in sync