Try our new research platform with insights from 80,000+ expert users

Faiss vs MongoDB 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

Faiss
Ranking in Open Source Databases
13th
Average Rating
8.0
Reviews Sentiment
8.8
Number of Reviews
2
Ranking in other categories
Vector Databases (5th)
MongoDB
Ranking in Open Source Databases
5th
Average Rating
8.2
Reviews Sentiment
6.6
Number of Reviews
81
Ranking in other categories
NoSQL Databases (1st), Managed NoSQL Databases (8th)
 

Mindshare comparison

As of July 2025, in the Open Source Databases category, the mindshare of Faiss is 3.9%, up from 3.4% compared to the previous year. The mindshare of MongoDB is 3.6%, down from 4.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Open Source Databases
 

Featured Reviews

Vasu Bansal - PeerSpot reviewer
Provides quick query search and has a big database
I did not face any issues integrating Faiss with other tools. I would recommend the solution to other users. Faiss has facilitated my AI-driven project very well. I recommend that other users use it for their AI projects because it provides quick query search and has a big database. Overall, I rate the solution nine and a half out of ten.
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…

Quotes from Members

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

Pros

"The product has better performance and stability compared to one of its competitors."
"I used Faiss as a basic database."
"The solution does not hold data in tabular format like SQL does but rather clusters data so that it can link on a large scale."
"We decided to work with MongoDB as its interface is easier to understand and more universal."
"MongoDB is relatively fast compared to relational databases."
"Easier to maintain the data with its document-based storage."
"It is convenient to use because we can do manipulations with the JSON data that we get. There are also a lot of joins and associations with MongoDB, which makes it easy to use for us."
"The most valuable feature is the geometric information done with GeoJSON."
"like its performance and the stability. It's very stable and, performance-wise, it's really great."
"MongoDB has many good replication features and good performance."
 

Cons

"It would be beneficial if I could set a parameter and see different query mechanisms being run."
"It could be more accessible for handling larger data sets."
"From my point of view, they need a totally free IDE to work at high levels."
"I'd like to see an ID generator. It's very technical but I don't think it has one, so we have to go to great lengths to work around that."
"The solution could have more integration."
"MongoDB should support TypeScript."
"Enhancing the documentation to make it more beginner-friendly is crucial."
"The performance of the solution could be improved."
"There is a need for improvement in MongoDB's customer support."
"MongoDB is a very useful and convenient choice, but sometimes for more complex projects, there are certain niche requirements that appear, so using a different tool could be beneficial. It raises the complexity of the architecture, but it could be beneficial to the world, the features, the ease of the features which are being implemented."
 

Pricing and Cost Advice

"It is an open-source tool."
"Faiss is an open-source solution."
"I believe that MongoDB is free."
"The solution is open source, so it is free."
"I believe that the licensing fees are paid on a yearly basis."
"MongoDB is a free solution. We wanted to have high availability and the subscription cost was quite expensive because the basic one is free and then when you want to have some other replications or other features you will need to pay money. Overall the solution is expensive."
"MongoDB has a free version. You can also buy the enterprise edition, which is cheaper than Oracle."
"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."
"I'm using the free version of MongoDB."
"I don't know, but I have heard from people who procure it that it is much cheaper than Oracle."
report
Use our free recommendation engine to learn which Open Source Databases solutions are best for your needs.
860,168 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
18%
Financial Services Firm
14%
Manufacturing Company
8%
Educational Organization
8%
Financial Services Firm
17%
Computer Software Company
13%
Manufacturing Company
7%
University
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

What do you like most about Faiss?
I used Faiss as a basic database.
What needs improvement with Faiss?
I didn't know what algorithm was being learned to fetch my query. It would be beneficial if I could set a parameter and see different query mechanisms being run. I can then compare the results to s...
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...
 

Comparisons

 

Overview

 

Sample Customers

1. Facebook 2. Airbnb 3. Pinterest 4. Twitter 5. Microsoft 6. Uber 7. LinkedIn 8. Netflix 9. Spotify 10. Adobe 11. eBay 12. Dropbox 13. Yelp 14. Salesforce 15. IBM 16. Intel 17. Nvidia 18. Qualcomm 19. Samsung 20. Sony 21. Tencent 22. Alibaba 23. Baidu 24. JD.com 25. Rakuten 26. Zillow 27. Booking.com 28. Expedia 29. TripAdvisor 30. Rakuten 31. Rakuten Viber 32. Rakuten Ichiba
Facebook, MetLife, City of Chicago, Expedia, eBay, Google
Find out what your peers are saying about Faiss vs. MongoDB and other solutions. Updated: June 2025.
860,168 professionals have used our research since 2012.