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MongoDB vs PostgreSQL comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jan 23, 2025

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

MongoDB
Ranking in Open Source Databases
5th
Average Rating
8.2
Reviews Sentiment
6.8
Number of Reviews
79
Ranking in other categories
NoSQL Databases (1st), Managed NoSQL Databases (9th)
PostgreSQL
Ranking in Open Source Databases
2nd
Average Rating
8.4
Reviews Sentiment
7.7
Number of Reviews
125
Ranking in other categories
Vector Databases (9th)
 

Mindshare comparison

As of April 2025, in the Open Source Databases category, the mindshare of MongoDB is 4.4%, up from 3.5% compared to the previous year. The mindshare of PostgreSQL is 18.2%, down from 21.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Open Source Databases
 

Featured Reviews

Uzair Faruqi - PeerSpot reviewer
Transforms data flow with adaptable schema and smooth public cloud deployment
One of our business units uses MongoDB, and we developed an ETL pipeline that extracts data from MongoDB and transfers it into our data warehouse MongoDB is a NoSQL database that is similar to a document database. It offers flexibility in schema adaptation, allowing us to change the schema and…
AdityaSharma3 - PeerSpot reviewer
Transaction processes are fast and good replication capability
Use cases include querying data warehouses and databases to fetch data for clients already working on PostgreSQL.  We also use Postgres for building reports It's a transactional database, so we use Postgres for most of our reporting. That's where it's helping. The query speed is fast, and the…

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"The installation is very easy to do and understand."
"MongoDB is flexible and it allows other applications to be added."
"The reports are useful for controlling the load of our whole architecture."
"I found that MongoDB is most valuable for storing school-related queries. It's also user-friendly, and I found no difficulty accessing it. Setting it up is easy too."
"I find the integration with other tools very easy."
"It is very easy to create a MongoDB cluster. You can deploy three nodes in one hour. You can do small configurations to enable routing. It is easy to implement."
"MongoDB stores the JSON data, and it's easy for me to understand because I'm a JavaScript Developer."
"MongoDB is scalable and stable. The initial setup is very easy, and deployment and maintenance can be done by one person."
"It has completely met our needs. It works, and it is robust. We haven't had any problems with what PostgreSQL does for us and the way it does it. That's why we've been using it for so long. We understand it, and it does the job."
"The solution is open-source and free to use."
"This is an open-source solution, operates at a high speed, and supports more than one SQL language."
"The system can perform faster analysis by providing it with a lot of memory. Speed is crucial for analytics. Currently, the main reason we haven't adopted Elasticsearch is that we lack the necessary expertise to manage it."
"It is easy to install and easy to manage. There is no license on it, so it is free. There is high compatibility with Oracle, and there are many tools for the migration of data from Oracle to Postgre."
"The community support and the open-source community for it are good."
"It is a pretty comprehensive database system. Its performance is good, and it does what it is supposed to do. It also integrates very well."
"The most valuable feature is the performance."
 

Cons

"The user interface is not as friendly as Oracle, which is something that can be improved."
"There should be better integration with other databases."
"It would be much more useful if I have an admin user and a password."
"There is room for improvement in integrating MongoDB with agentive AI solutions."
"Enhancing the documentation to make it more beginner-friendly is crucial."
"It isn't easy to recognize entities with MongoDB."
"The solution can be a bit tough to set up if you don't have knowledge about how the database works."
"MongoDB should not be used for reporting, analytics, or number-crunching tasks."
"Postgres should focus on building a stronger knowledge base. They also need to expand their integration capabilities, so more tools and resources are available to manage it."
"It still needs to be more mature and have some backup feature. We are normally dealing with Oracle's data, and we have very strong online tools to back up the data and do other things. PostgreSQL still needs to do more in this area as well as in the high availability area. There are many external tools that you can use for PostgreSQL's high availability, but there is no embedded tool within PostgreSQL for high availability. It could have a feature similar to Oracle for working on a distributed system. It can have some scripts to improve the monitoring and some tools to do performance analysis. We have a workaround for most of such requirements except for the support for a distributed system, which is very difficult to have. This area should be included in the core of the database itself."
"There could be a plugin to distribute the data on servers for the product."
"We have to set up event API, which takes a lot of events from the user."
"As PostgreSQL is an open-source product, you do have to do a bit more configuration and management yourself."
"I'm not really able to customize it."
"There are several features I would like to improve that aren't working as expected. It's likely that the latest version is doing something that was missed in the previous versions. For example, the output parameters — the stored procedures — is something new in PostgreSQL that Firebird has already had for a long time."
"If it was free to use, it would be the perfect solution."
 

Pricing and Cost Advice

"MongoDB's pricing is not reasonable, but it is not as expensive as the others."
"I only used the open-source version."
"We are using the Community Edition of MongoDB."
"The pricing is favorable if you opt to install MongoDB on an Amazon EC2 instance as you won't have to pay for the extra Atlas services and can instead manage the scaling yourself. This allows for a cost-effective solution and using MongoDB on a small scale, I have been able to utilize it for free."
"You only have to pay for the paid version, not the open-source version."
"MongoDB has a free version. You can also buy the enterprise edition, which is cheaper than Oracle."
"If you want support with the solution you will need to purchase a license and not use the open-source version. The license is a little expensive."
"I believe that MongoDB is free."
"PostgreSQL is a free and open-source database."
"This solution can offer a cheaper choice for customers since it is open-source."
"It is also open-source so it is free."
"Our company pays for it. There are free versions available, but for advanced features, you obviously have to pay."
"PostgreSQL is open-source, so if capable admins are available then the setup cost can be $0."
"The community version of Postgre is basically free."
"We are using the free version of PostgreSQL."
"It is an open-source platform."
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Top Industries

By visitors reading reviews
Financial Services Firm
18%
Computer Software Company
15%
University
7%
Manufacturing Company
6%
Computer Software Company
16%
Financial Services Firm
12%
Comms Service Provider
9%
Manufacturing Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

Questions from the Community

What do you like most about MongoDB?
MongoDB's approach to handling data in documents rather than traditional tables has been particularly beneficial.
What is your experience regarding pricing and costs for MongoDB?
We use the free version of MongoDB, so there are no licensing costs.
What needs improvement with MongoDB?
There is room for improvement in integrating MongoDB with agentive AI solutions. While solutions for other databases like SQL or PostgreSQL ( /products/postgresql-reviews ) already exist, MongoDB r...
How does Firebird SQL compare with PostgreSQL?
PostgreSQL was designed in a way that provides you with not only a high degree of flexibility but also offers you a cheap and easy-to-use solution. It gives you the ability to redesign and audit yo...
What do you like most about PostgreSQL?
It's a transactional database, so we use Postgres for most of our reporting. That's where it's helping.
What is your experience regarding pricing and costs for PostgreSQL?
The tool is free of cost. For now, it's not about making money. But once we perfect it, we can offer it to customers willing to pay for support and other services. Most of my deployments are free.
 

Comparisons

 

Overview

 

Sample Customers

Facebook, MetLife, City of Chicago, Expedia, eBay, Google
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Find out what your peers are saying about MongoDB vs. PostgreSQL and other solutions. Updated: March 2025.
845,406 professionals have used our research since 2012.