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MongoDB

by MongoDB, Inc. · Database · also known as MongoDB Community Server, MongoDB Atlas

Document database storing BSON documents with a rich aggregation pipeline, available as a source-available Community Server or the managed Atlas service

SSPL-1.0 licenseFreeFreemiumUsage-basedEnterpriseSelf-hostedCloudSelf-hostable
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Checked Nov 2, 2026

Overview

MongoDB is a document-oriented database developed by MongoDB, Inc. Data is stored as BSON documents grouped in collections, with flexible schemas, secondary indexes and an aggregation pipeline for transformations and analytics. Replica sets provide high availability and sharding distributes collections across nodes. Multi-document ACID transactions, change streams, time-series collections and Atlas Search and Vector Search are part of the current platform.

The Community Server is licensed under the Server Side Public License (SSPL), which the Open Source Initiative does not classify as open source, so it is recorded here as source-available. MongoDB Atlas is the managed multi-cloud service with a free tier and usage-based clusters; Enterprise Advanced covers self-managed commercial deployments. Official drivers exist for the major languages, and the Mongoose and Prisma ecosystems are common in JavaScript projects.

MongoDB suits applications whose records are naturally nested and whose schema evolves quickly; relational joins and strict constraints are weaker than in SQL systems, and the SSPL limits offering it as a hosted service.

Capabilities

  • BSON document storage with flexible schemas
  • Aggregation pipeline for transformation and analytics
  • Replica sets and sharding for availability and scale
  • Multi-document ACID transactions and change streams
  • Time-series collections
  • Atlas Search and Vector Search in the managed service

Typical workflows

  1. Content and catalog storage for web and mobile apps
  2. Event and log ingestion with time-series collections
  3. Vector search for RAG in Atlas

Strengths

  • Schema flexibility for evolving document models
  • Official drivers for most languages
  • Managed service with a free tier

Limitations

  • SSPL restricts offering MongoDB as a service
  • Joins and multi-collection constraints weaker than SQL
  • Vector and full-text search features are tied to Atlas

Prerequisites

  • A server or container, or an Atlas account

Who it is for

  • Application developers
  • Teams building document-centric APIs

Alternatives & comparison

  • Elasticsearch

    Distributed search and analytics engine on Apache Lucene with full-text, aggregations, vector search and ES|QL; triple-licensed AGPL, SSPL and Elastic License

    MixedOpen source
  • MySQL

    Oracle's widely deployed open-source relational database server, offered as a GPL community edition and commercial enterprise and cloud editions

    MixedOpen source
  • Neo4j

    Native property-graph database queried with Cypher, offered as a GPL community edition, a commercial enterprise edition and the AuraDB cloud service

    MixedOpen source
  • PostgreSQL

    Open-source object-relational database server with a large extension ecosystem (PostGIS, pgvector, TimescaleDB) and broad SQL coverage

    Open sourceOpen source
  • Redis

    In-memory key-value data store used as cache, message broker and database, with data structures, Pub/Sub, Streams and, since Redis 8, built-in JSON, search and time-series modules

    MixedOpen source
  • Supabase

    Open-source backend platform built around a dedicated PostgreSQL database with auto-generated APIs, authentication, file storage, realtime subscriptions and edge functions

    Open sourceOpen source
Compare MongoDB with its alternatives →

Sources & verification

Primary sources consulted for this record. Claims are tied to the fields each source supports; the automated link checker re-verifies every URL on a schedule.

  • License
    Server Side Public License

    https://www.mongodb.com/legal/licensing/server-side-public-license

    Supports: license_spdx, source_model

    checked Nov 1, 2026
  • Official documentation
    MongoDB Documentation

    https://www.mongodb.com/docs

    Supports: capabilities, languages

    checked Nov 1, 2026
  • Official site
    MongoDB

    https://www.mongodb.com/

    Supports: name, summary

    checked Nov 1, 2026
  • Pricing page
    MongoDB Pricing

    https://www.mongodb.com/pricing

    Supports: pricing_model

    checked Nov 1, 2026
  • Repository
    mongodb/mongo

    https://github.com/mongodb/mongo

    Supports: repo_url

    checked Nov 1, 2026
Confidence
High
Reviewed
Nov 1, 2026
Links
Broken · Nov 2, 2026

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Redis

Redis Ltd. · NoSQL & key-value stores

In-depth entry

In-memory key-value data store used as cache, message broker and database, with data structures, Pub/Sub, Streams and, since Redis 8, built-in JSON, search and time-series modules

LicenseRef-RSALv2 OR SSPL-1.0 OR AGPL-3.0-onlyOpen sourceFreeSelf-hostedNov 2, 2026

Kùzu

Kùzu Inc. (company acquired; project archived) · NoSQL & key-value stores

In-depth entry

Embedded property-graph database with Cypher, vector and full-text search; MIT-licensed but archived in October 2025 after the company was acquired

MITOpen sourceFreeLocalDiscontinuedNov 2, 2026

Neo4j

Neo4j, Inc. · NoSQL & key-value stores

Native property-graph database queried with Cypher, offered as a GPL community edition, a commercial enterprise edition and the AuraDB cloud service

GPL-3.0Open sourceFreemiumSelf-hostedBroken