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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

"It is very fast - faster than an SQL or MySQL Server."
"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."
"Scalability seems good. I've never been even close to finding the limits. I've run a couple of notes of redundancy but I've never had any problems with scalability."
"The solution is user-friendly with a good object retrieval feature."
"MongoDB has a simple data-loading interface."
"My impression is that the initial setup is straightforward."
"It's super easy to develop a couple of solutions for clients with MongoDB, like a quick web page with no clear data structure that they need to spin up quickly to validate some sort of MDTP."
"I like that you can move any relational database from Oracle to PostgreSQL. I also like that it's pretty stable."
"Postgres is rock solid when deployed according to best practices as documented by the PostgreSQL community. When it's installed correctly, PostgreSQL is an enterprise-grade solution."
"We use the solution to store tables. It is stable and performs well."
"What I like is that it's quite powerful in terms of performance."
"It's quite scalable."
"It's a transactional database, so we use Postgres for most of our reporting. That's where it's helping."
"PostgreSQL is stable. It's available, stable, and reliable."
"The built-in code procedural language is the most valuable. It has a built-in layer for code procedures. Its installation is very easy and quick, and it is free. It is also stable, and its performance is also good."
 

Cons

"Sometimes, the tool goes down temporarily. There are some stability issues in the product."
"The solution could include more integrations with other platforms."
"The solution should have better integration."
"I think it would be good to have more search options such as an index resource. This will provide more options and resources to do advance searches."
"It would be much more useful if I have an admin user and a password."
"We'd like information about client onboarding experience and success stories. It would help to have something to show to internal stakeholders."
"The performance of the solution could be improved."
"Enhancing the documentation to make it more beginner-friendly is crucial."
"It could be more secure."
"The solution needs to improve the query, documentation, and JSON data functionality."
"The search option is not very good."
"I had some issues when I integrated with the Jupyter Notebook."
"It is possible that in the newer version this has been addressed, but I would like the deployment in microservices architecture could be improved."
"The scalability is limited."
"The performance of PostgreSQL could improve."
"PostgreSQL is a stable system, but from a security point of view, it still needs improvement."
 

Pricing and Cost Advice

"I only used the open-source version."
"MongoDB is an open-source solution."
"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."
"It's open-source."
"I believe that the licensing fees are paid on a yearly basis."
"The pricing is normal. Price-wise, the product is not too much expensive."
"MongoDB is a bit expensive compared to its competitors."
"There is an enterprise license and it could be cheaper. We are using the free open source version."
"The licensing model is good."
"It is an open-source platform."
"It is also open-source so it is free."
"It could be much cheaper. If you would like to build an application on Amazon today, PostgreSQL is the standard database with Redshift. If you want other databases, you can add them, but PostgreSQL is the basis of everything. It's a question of money, that's it."
"The tool is cheaply priced compared to other RDBMS providers in the market."
"It is free. There is no license on it."
"It is open-source. If you use it on-premise, it is free. It also has enterprise or commercial versions. If you go for the cloud version, there will be a cost, but it is lower than Oracle or Microsoft."
"Our company pays for it. There are free versions available, but for advanced features, you obviously have to pay."
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Top Industries

By visitors reading reviews
Financial Services Firm
19%
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

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Find out what your peers are saying about MongoDB vs. PostgreSQL and other solutions. Updated: April 2025.
847,862 professionals have used our research since 2012.