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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 (7th)
 

Mindshare comparison

As of June 2025, in the Open Source Databases category, the mindshare of MongoDB is 3.9%, down from 3.9% compared to the previous year. The mindshare of PostgreSQL is 17.9%, down from 20.4% 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…
PavithrarajShetty - PeerSpot reviewer
Offers simplicity and is cheaply priced
I haven't gone through the scalability aspect since I was using MySQL Server. I haven't worked to a high level in PostgreSQL, but with MySQL Server, I have managed clustering and partitioning. I think I haven't put much focus on PostgreSQL, so I am not sure how it behaves or how it works.

Quotes from Members

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

Pros

"MongoDB is fast and efficient."
"The most valuable feature is the speed of MongoDB."
"The solution has good flexibility and very fast performance for searching data."
"We decided to work with MongoDB as its interface is easier to understand and more universal."
"I like that MongoDB has a free version. You can also buy the enterprise edition, which is cheaper than Oracle."
"MongoDB is simpler to learn and implement than traditional SQL solutions like MySQL."
"The installation is very stable."
"I find the integration with other tools very easy."
"The solution is scalable, it is very good."
"This is an open-source solution, operates at a high speed, and supports more than one SQL language."
"PostgreSQL has complete SQL dialects and is useful for writing sophisticated and complex queries. We have experience with Oracle database. My partner is experienced in DDA and he writes sophisticated SQL queries. The solution helps to get the job done in the best possible way. In today’s age, most developers do not have strong SQL knowledge or language command. They find it difficult to write even a SQL statement. These developers write cool queries which perform badly on the database end. As DBAs, we constantly urge the developers not to write bad queries, help them learn more, and write placebo commands."
"It is very simple to manage."
"The solution is open-source and free to use."
"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."
"We use the solution to store tables. It is stable and performs well."
"Initial setup is simple."
 

Cons

"The dashboard is an area of concern in the solution where improvements are required."
"MongoDB should be more stable, and support should be more efficient."
"Our program developer finds it to be a little unstable, development-wise."
"There are some problems with bugs appearing in sharding when the data is too high."
"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."
"The analytics needs improvement."
"It would be good to have scalability for clusters. For example, if we have three clusters, we should be able to increase to five clusters if required. I am not sure if such a feature is currently there. I hope there is good documentation for this."
"Some of the solution's transaction capabilities can be improved."
"PostgreSQL could improve by providing a geographical solution for tracking trucks and people in the field. They might already have features similar to this and I have not found them. I haven't done research about this topic."
"I'd like to see better memory management. I think that that's one of the few areas that Postgres does not handle as well as MySQL does or did."
"I don't think PostgreSQL supports bulk databases, so it needs to have more capabilities in terms of managing the bulk data."
"The pricing could be better."
"It needs more integration."
"They need to have a better graphical interface. There is a tool called pgAdmin 4 that they use, which is free. It is written in Java, and it is slow. They need to have a better product that is similar to Toad for Oracle, but, of course, it is hard to get something that's really great and free. Other than that, it is great."
"PostgreSQL could improve by adding data warehousing tools."
"The scalability is limited."
 

Pricing and Cost Advice

"MongoDB's pricing is not reasonable, but it is not as expensive as the others."
"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."
"The product is affordable."
"It's open-source."
"There are different licenses available to be purchased, such as individual, premium, or enterprise."
"I'm using the free version of MongoDB."
"MongoDB has a free version. You can also buy the enterprise edition, which is cheaper than Oracle."
"You only have to pay for the paid version, not the open-source version."
"PostgreSQL is open-source, so if capable admins are available then the setup cost can be $0."
"Affordable solution."
"The solution requires a license."
"The tool is cheaply priced compared to other RDBMS providers in the market."
"The need for our customers to pay for licences is contingent on their projects and budgets."
"PostgreSQL is a free and open-source database."
"It is an open-source platform."
"We do not pay for licensing."
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Top Industries

By visitors reading reviews
Financial Services Firm
18%
Computer Software Company
14%
University
7%
Manufacturing Company
6%
Computer Software Company
15%
Financial Services Firm
12%
Comms Service Provider
10%
Manufacturing Company
7%
 

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: June 2025.
856,873 professionals have used our research since 2012.