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MongoDB: the flexible NoSQL database for modern applications

Discover MongoDB, the NoSQL database behind modern applications

MongoDB is a document-oriented database that stores your data in a flexible, JSON-like format and evolves at the pace of your applications.

A product catalogue where attributes vary from one item to the next, user profiles that grow richer over time, application events whose shape keeps changing: where a relational database forces you to freeze the schema upfront, MongoDB adapts. That is why it has become a go-to foundation for web, mobile and AI applications.

Interface MongoDB Atlas - explorateur de données et clusters

MongoDB is built around four functional pillars:

From the open source database to the managed cloud, each building block serves a specific need.

1. The document model: a schema that follows your code

Data is stored as documents, close to the objects your developers already work with.

  • Model your data the way you write your code, without piling up joins
  • Evolve the schema without taking the application down
  • Query your documents with a rich query language and aggregation pipelines
  • Index the fields you need to keep response times low

2. MongoDB Atlas: the managed database in the cloud

Atlas deploys and operates your MongoDB clusters on AWS, Google Cloud or Azure.

  • Spin up a cluster in minutes, with no server administration
  • Automate backups, upgrades and monitoring
  • Scale resources on demand based on actual load
  • Choose where your data is hosted, including European regions
  • Discover the service here

3. Search and AI: from full-text to vectors

Atlas includes full-text search and vector search, directly on your data.

  • Add full-text search to your applications without an external engine
  • Store embeddings and run semantic searches for your RAG use cases
  • Connect your language models to your data through frameworks such as LangChain
  • Combine business filters and vector similarity in a single query
Schéma de la recherche vectorielle MongoDB Atlas dans une architecture RAG

4. Scalability and high availability: a database that grows with you

MongoDB is designed to absorb growth in both data volumes and users.

  • Replicate your data across several nodes to keep the service running
  • Distribute the load through sharding as volumes increase
  • Spread your data across regions to bring it closer to users
  • Secure access with encryption and fine-grained permissions

Planning a MongoDB project? turnK designs your data architectures and applications, from data modelling to deployment. Take a look at our Data & AI services or contact us: our consultants reply within 48 hours.

Les questions les plus fréquentes

What is MongoDB?

MongoDB is a document-oriented NoSQL database: data is stored in a flexible, JSON-like format rather than rigid tables. It is available as an open source database you host yourself, or as a managed cloud service with MongoDB Atlas.

Who is MongoDB for?

Teams building applications whose data changes fast: web and mobile platforms, product catalogues, IoT, AI applications. From startups to large enterprises, Atlas makes the database accessible without server administration expertise.

What are MongoDB's main features?

The flexible document model, a rich query language with aggregation pipelines, replication and sharding for scale, plus full-text and vector search built into Atlas for search and AI use cases.

How much does MongoDB cost?

The community edition is open source and free to self-host. MongoDB Atlas, the managed cloud service, is billed based on the resources you consume, with an entry tier to get started; up-to-date pricing is available on the official website.

When should you choose MongoDB over a relational database?

MongoDB shines when the schema evolves often or the data is semi-structured. For highly relational, transactional data, a database like PostgreSQL often remains the right choice. turnK helps you decide based on your use cases, and both coexist well in a single architecture.