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Faiss vs MongoDB Enterprise Advanced comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jul 31, 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
4.0
Number of Reviews
3
Ranking in other categories
Vector Databases (5th)
MongoDB Enterprise Advanced
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 August 2025, in the Open Source Databases category, the mindshare of Faiss is 3.8%, down from 3.9% compared to the previous year. The mindshare of MongoDB Enterprise Advanced is 4.1%, up from 4.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Open Source Databases
 

Featured Reviews

Kalindu Sekarage - PeerSpot reviewer
Integration improves accuracy and supports token-level embedding
The best features FAISS offers for my team include seamless integration with Colbert and the ability to use FAISS via the Ragatouille framework, which is tailor-made for using the Colbert model. Feature-wise, FAISS allows for more accurate result retrieval, and retrieval speed is also good when comparing the index size. Regarding features, I also emphasize that the usability of FAISS is very seamless, particularly its integration with Colbert and Ragatouille. FAISS has positively impacted my organization by helping us increase the accuracy of retrieval documents; when we store documents in token-level embedding, the accuracy will be high. Additionally, we do not need any external server to host FAISS, allowing us to integrate it with our backend framework, making it a very flexible framework.
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 geospatial index feature is useful for dealing with latitude and longitude data."
"MongoDB is cool. There is a difference between relational databases and newer databases like MongoDB. MongoDB is scalable and fast."
"MongoDB is extremely developer-friendly because when you are starting, there is very little time needed upfront in terms of planning."
"It is a stable solution. Stability-wise, I rate the solution a nine out of ten...Overall, MongoDB has helped manage and analyze attachment data."
"It is easy to use."
"MongoDB is simpler to learn and implement than traditional SQL solutions like MySQL."
"MongoDB is relatively fast compared to relational databases."
"like its performance and the stability. It's very stable and, performance-wise, it's really great."
 

Cons

"One of the drawbacks of Faiss is that it works only in-memory. If it could provide separate persistent storage without relying on in-memory, it would reduce the overhead."
"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."
"The on-premises version of the solution is still pretty expensive, especially compared to the cloud version."
"The product's data consistency could be more efficient than traditional SQLs."
"The stability could be improved."
"Enhancing the documentation to make it more beginner-friendly is crucial."
"The solution could have more integration."
"I think that MongoDB's search engine should be improved."
"It has certain limitations when it comes to handling hierarchical data, enforcing relationships, and performing complex joins, which should be taken into account when designing databases for applications with intricate data requirements."
"MongoDB should improve its data loading part."
 

Pricing and Cost Advice

"Faiss is an open-source solution."
"It is an open-source tool."
"MongoDB has a free version. You can also buy the enterprise edition, which is cheaper than Oracle."
"I believe that MongoDB is free."
"MongoDB is a bit expensive compared to its competitors."
"It's a community edition, so we do not pay anything."
"I don't know, but I have heard from people who procure it that it is much cheaper than Oracle."
"I currently use the solution's community edition which is free."
"The pricing is normal. Price-wise, the product is not too much expensive."
"MongoDB's pricing is not reasonable, but it is not as expensive as the others."
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Top Industries

By visitors reading reviews
Computer Software Company
18%
Financial Services Firm
14%
Manufacturing Company
8%
University
8%
Financial Services Firm
15%
Computer Software Company
11%
Manufacturing Company
8%
University
8%
 

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 pay approximately 2,000 euros per month for MongoDB.
What needs improvement with MongoDB?
I'm not sure about the documentation or the knowledge bases available for MongoDB because I don't interact with it at that level, but I would say it's minimal and could be improved. I am not experi...
 

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 Enterprise Advanced and other solutions. Updated: July 2025.
865,140 professionals have used our research since 2012.