| NoSQL Model | Description | Example Database | Best For |
|---|---|---|---|
| Key-Value | Simple key-value pairs | Redis, DynamoDB | Caching, session management |
| Document | Stores structured data as JSON/BSON | MongoDB, CouchDB | Flexible document storage |
| Column-Family | Uses column-oriented storage | Cassandra, HBase | Big data, analytics |
| Graph | Stores nodes and relationships | Neo4j, ArangoDB | Social networks, recommendations |