Comparing MongoDB with Elasticsearch

If you're managing large amounts of data, you need to use a secure database that makes it easy to update and retrieve information. Two of the more popular data storage platforms are MongoDB and Elasticsearch. Both solutions are document-oriented and are easy to scale when you need to grow your business operations.

But how do they compare? In this post, we're going to look at some of the differences between MongoDB and Elasticsearch so that you can decide which solution works best for you.

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What Is MongoDB?

MongoDB is an open-source NoSQL database that’s used for storing data in high volumes. 

It’s also a document-oriented database, meaning it uses collections and documents instead of tables and rows. This is a feature that makes it different than MySQL. This feature also enables MongoDB to be more flexible and capable of keeping up with the speed of modern business.  

Let’s take a look at some key features of MongoDB.

  • MongoDB uses dynamic schemas for documents, so you don’t have to define structures like fields and values before building records. 
  • Data in MongoDB is stored in BSON (Binary JSON), a modified version of JSON which has been customized to improve flexibility and speed. 
  • MongoDB is also capable of handling and converting JSON to BSON.

MongoDB comes with automatic sharding built-in, so you can distribute large data sets across multiple systems. This is done through horizontal scaling, a process that incorporates more servers to boost capacity as data volumes increase. 

Some of the benefits of using MongoDB

Documented oriented

Data stored in MongoDB is similar to the data you'll be working with for client and server-side scripts. This means you don't have to transfer data from rows to objects continuously.

Highly flexible

The data in MongoDB has a flexible schema, which gives you the freedom to use data-matching choices that align with your application's performance requirements.


MongoDB horizontal growth capabilities make it extremely useful for projects that require on-demand scalability as the projects grow.

What Is Elasticsearch?

Elasticsearch is an open-source search engine that supports broad distribution and offers seamless scalability. 

Marketed as “Enterprise Search Software,” Elasticsearch is popular among large organizations because of how easy it makes reporting and retrieving business data. Elasticsearch even supports real-time analytics, so companies can search, analyze, and monitor data as it’s being recorded.

Some of the benefits of using Elasticsearch

Highly Scalable

You can scale the Elasticsearch cluster to thousands of servers and store high-capacity data if needed. This is due to Elasticsearch’s distributed architecture, which makes scaling a simple process

Easy Indexing Operations

During an indexing operation, Elasticsearch converts raw data like logs and message files into an internal document. Those documents are then stored into indexes as structured JSON objects

Thanks to automation, Elasticsearch makes adding documents to indices a quick and easy process. It uses RESTful API to simplify the process of retrieving, submitting, and verifying data from your command line. This means you can perform most of Elasticsearch’s operations through the console, which is really convenient.

Lightning Fast Search

Speed is another selling point for Elasticsearch. It uses the filesystem cache to provide users with extremely fast searches. Something that most SQL databases aren’t equipped to do. 

If you wanted to compare the speed of Elasticsearch with MySQL, the results would be significantly different. It would take roughly 10 seconds for MySQL to complete a query that Elasticsearch could do in 10 milliseconds using the same hardware configuration.

Another reason why full-text searches are extremely fast on Elasticsearch is because of how documents are indexed. Elasticsearch stores the documents in close proximity to the corresponding metadata, which reduces the number of data reads and helps hasten the searching process. What’s more, Elasticsearch uses compression to decrease the index growth rate, which also helps to prevent Elasticsearch from becoming slow and bogged down. 

Before you go all-in with Elasticsearch, consider this. One of the main reasons why Elasticsearch is so much faster than SQL databases is based on the functionality of both platforms. SQL databases aren’t capable to handle full-text searches because that’s not their function. Similarly, Elasticsearch is a search engine. While it can act as a NoSQL database, it’s designed and optimized for full-text searches.

Head to Head: MongoDB vs Elasticsearch 

Now that we’ve looked at the two platforms, let’s compare and contrast them.

Both solutions are used to manage NoSQL data. MongoDB and Elasticsearch are popular for their scalability and because they’re both designed to be document-oriented. With that said, MongoDB and Elasticsearch have vastly different functions despite some of their similarities. And it’s important to keep that in mind when comparing the two technologies.

When it comes to full-text searches, Elasticsearch performs better than MongoDB. It also excels at log analytics because it offers a broad range of aggregation queries and supports Logstash, Beats, and Kibana. 

However, MongoDB performs better when you need a scalable database for data in NoSQL format––especially if you need CRUD operations without support for full-text search. As a leader in document-oriented databases, MongoDB performs best as a database with high throughput transactions. Because of this, it’s commonly used for:

  • Ecommerce product catalogs 
  • Content management and blogging
  • Social networking 

But if you need a solution that excels in handling full-text searches, finding anomalies, and logging analytics, Elasticsearch is your best bet.

Choosing the Right Solution for You

Now that we’ve looked at the similarities and differences of MongoDB and Elasticsearch, one question remains. Which one should you implement? 

There’s not a straightforward answer to that question. Both are great solutions, but choosing the right option for you depends on your needs and expectations.

Both options offer good solutions to common pain points associated with MySQL, but Elasticsearch and MongoDB are also fundamentally different. Ultimately, MongoDB is a NoSQL database system, and Elasticsearch is a search engine. While there’s an overlap in the services they provide, one doesn’t replace the other

Using Elasticsearch to store data is certainly possible, but we recommend using MongoDB if you need a general-purpose database. With that said, you can get the most out of Elasticsearch by using it alongside MongoDB (or any other SQL and NoSQL database), because you can use Elasticsearch to run complex search queries and analyze the data you store.

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