Glossary · Web & App Development
MongoDB
Overview
What MongoDB is
MongoDB is a document-oriented NoSQL database. Instead of storing data in the rows and tables of a relational database, it stores flexible, JSON-like documents (in a binary format called BSON) grouped into collections. Documents in the same collection do not need identical fields, so the schema can evolve as an application changes without rigid migrations.
Strengths and trade-offs
MongoDB scales horizontally through sharding, offers high availability via replica sets, and includes a powerful aggregation pipeline for analytics. Its flexibility suits rapidly changing or varied data. The trade-off is that data models with many complex relationships are often cleaner in a relational database, though MongoDB does support multi-document transactions when they are needed.
How an agency uses MongoDB
For backend development, full-stack development, and app backend and API development, MongoDB is a common choice in JavaScript-heavy stacks such as MERN, and for products with evolving or semi-structured data like catalogs, user activity, and content. An in-house team weighs it against relational options per project, choosing the database that fits the data rather than a default.
Where we use it
Related Zen in Tech services
How our team puts MongoDB to work in real projects.
FAQ
MongoDB — common questions
MongoDB vs SQL databases like PostgreSQL — which is better?
Neither is universally better. MongoDB suits flexible, evolving, or semi-structured data and horizontal scale; relational databases like PostgreSQL suit structured data with complex relationships and strong transactional guarantees. The right choice depends on your data model, not popularity.
When should I use MongoDB?
MongoDB fits well when your data is document-shaped or varied, your schema is likely to change, or you need to scale writes horizontally—common in content platforms, catalogs, real-time apps, and rapid prototypes. It fits less well for highly relational, transaction-heavy systems.
Is MongoDB free?
MongoDB's Community Edition is free to self-host under the SSPL license. MongoDB also offers Atlas, a fully managed cloud service, and an Enterprise edition—both paid—which many teams use to avoid managing the database themselves.
Need MongoDB done right?
Book a free consultation and we’ll map the fastest, most cost-effective path for your project.
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