Enterprise Database Selection Guide: Cosmos DB vs MongoDB

Cosmos DB

Advantages:

1. Global Distribution: Cosmos DB provides globally distributed database services, allowing data to be stored in multiple Azure data centers across different regions, thereby reducing latency.
2. Multi-Model Support: Cosmos DB supports multiple data models, including document, key-value, graph, and table.
3. Strong Consistency and High Availability: Cosmos DB offers strong consistency, high availability, and high performance, with a 99.999% high availability Service Level Agreement (SLA).
4. Flexible Scalability: Cosmos DB supports horizontal scaling, capable of handling large amounts of data and high traffic.

Disadvantages:

1. Azure-Only: Cosmos DB can only run on Azure, so if you need to migrate to other cloud providers, a comprehensive migration may be required.
2. Cost: Although Cosmos DB offers powerful features, its cost may be higher compared to MongoDB Atlas.

MongoDB

Advantages:

1. Multi-Cloud Support: MongoDB can run on multiple cloud providers such as AWS, Azure, and Google Cloud, supporting multi-cloud clusters.
2. Rich Features: MongoDB offers a variety of features, including full-text search, geospatial processing, and time-series data support.
3. Compatibility: MongoDB has excellent application compatibility, allowing seamless integration with existing MongoDB tools and applications.
4. Flexible Deployment Options: MongoDB provides more deployment options, allowing you to choose different cloud providers and configurations based on your needs.

Disadvantages:

1. Availability SLA: MongoDB Atlas offers a high availability SLA of 99.995%, slightly lower than Cosmos DB's 99.999%.
2. Scalability: While MongoDB supports horizontal scaling, its scalability may not be as robust as Cosmos DB.

Summary

If your company mainly uses Azure and requires global distribution and multi-model support, Cosmos DB might be the better choice. If you need more cloud provider options and rich features, MongoDB might better suit your needs.