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Azure Database for PostgreSQL vs Faiss comparison

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Comparison Buyer's Guide

Executive Summary

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

Azure Database for PostgreSQL
Ranking in Open Source Databases
4th
Average Rating
8.8
Reviews Sentiment
6.4
Number of Reviews
31
Ranking in other categories
Database as a Service (DBaaS) (3rd)
Faiss
Ranking in Open Source Databases
14th
Average Rating
8.0
Reviews Sentiment
3.3
Number of Reviews
3
Ranking in other categories
Vector Databases (15th)
 

Mindshare comparison

As of November 2026, in the Open Source Databases category, the mindshare of Azure Database for PostgreSQL is 2.0%, up from 0.6% compared to the previous year. The mindshare of Faiss is 2.9%, down from 3.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Open Source Databases Mindshare Distribution
ProductMindshare (%)
Azure Database for PostgreSQL2.0%
Faiss2.9%
Other95.1%
Open Source Databases
 

Featured Reviews

Sathish Palanisamy - PeerSpot reviewer
Staff Data Engineer at a transportation company with 10,001+ employees
Improves database performance, supports AI integration, and accelerates customer-focused innovation
Azure Database for PostgreSQL can be improved in the area of elastic capabilities. One of the things we were actively looking for is the elastic feature, which was made a GA at this Ignite event. I am really happy that finally in Azure, we have a product which we can use for elastic clusters. If you are bound with a single server, then you have a vertical limit. Now you do not have any limits. As long as your use case grows, we can grow. The only thing I would maybe be thinking about is we should also allow customers to pick different node sizes for every node inside the elastic eventually. Some nodes do not need that big capacity. So that may be a nice-to-have feature, though it is not a must-have at this point.
Kalindu Sekarage - PeerSpot reviewer
Senior Software Engineer
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.

Quotes from Members

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

Pros

"A native cloud approach actually has more advantage because it is easy to deploy, faster to deploy, and easy to recover and roll back."
"In terms of integration, we already have SharePoint online, and we're starting to explore PowerApps and PowerFlow. It's all seamless. The ease of integrating SQL and licensing purposes plays a significant role, making it a comfortable choice for the organization."
"Azure Database for PostgreSQL helps to speed up processes and really does impact the time to market for our applications."
"Azure Database for PostgreSQL has impacted our ability to innovate and stay competitive in our industry by helping our developers understand what features need to be used so they can deliver the customer use case much faster, get the value out faster, and once you get the value out faster, you are ahead of the competition."
"Azure Database for PostgreSQL has positively impacted my organization through collaboration by allowing me to generate a report within a second and send the MIS for an employee or a team, making it very easy to display for business purposes."
"I rate Azure Database for PostgreSQL 10 out of 10."
"Compared to my previous expenses for maintaining an on-premise PostgreSQL database, Azure Database for PostgreSQL is far easier, far simpler, and far cheaper in my opinion."
"Overall, we are satisfied with Microsoft solutions and recommend them."
"The product has better performance and stability compared to one of its competitors."
"I used Faiss as a basic database."
 

Cons

"There is a stability issue where, if the database usage peaks quickly, it may crash and require intervention to restore functionality. It does not auto-heal or self-heal in such situations."
"Azure Database for PostgreSQL has not helped reduce infrastructure costs for me or my clients."
"I believe Azure Database for PostgreSQL can be improved by allowing features that are only enabled or configured during creation to be configurable without redeploying the entire database, a process which can impact our customers if it involves an application outage."
"While the flexibility of the server for financial reasons is understandable, better switching between primary and backup would make transitions smoother."
"The pay-as-you-go pricing model of Azure Database for PostgreSQL has actually increased costs."
"Performance is one area that has constraints for our customers. I believe there could be improvements in the mirroring part and Change Data Capture (CDC)."
"However, when I start planning for production where the service will be up for two or three years, I prefer to pay upfront, as the pay-as-you-go model becomes expensive for production use."
"They can offer more RAG extensions. Currently, it only has the vector search."
"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."
"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."
 

Pricing and Cost Advice

"There aren't any notable areas for improvement that I could see. PostgreSQL was self-sufficient with no need for additional database knowledge to maintain it."
"We do not pay for a full-year subscription because our usage is still at the beginning phase and not much. The pay-as-you-go model works well for us."
"The pay-as-you-go pricing model plays a critical role in managing database-related costs and resource allocation. We build using Infrastructure as Code (IAC) and maintain a focus on FinOps to control Azure service costs. Some clients are pushy on price. It's critical to automate it, so we're just using it when appropriate and switching it off in certain scenarios."
"The pricing experience is positive. Azure Database for PostgreSQL reduces the need for hardware investments, and the pay-as-you-go pricing model positively affects database-related costs by allowing us to start small and scale as needed."
"Faiss is an open-source solution."
"It is an open-source tool."
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Top Industries

By visitors reading reviews
Comms Service Provider
18%
Financial Services Firm
13%
Manufacturing Company
9%
Outsourcing Company
8%
Financial Services Firm
15%
Comms Service Provider
11%
Manufacturing Company
9%
Computer Software Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise4
Large Enterprise19
No data available
 

Questions from the Community

What is your experience regarding pricing and costs for Azure Database for PostgreSQL?
My experience with pricing, setup cost, and licensing is that pricing is very important due to budget constraints in each project; while migration costs can be high during the process, after migrat...
What needs improvement with Azure Database for PostgreSQL?
In terms of improvement for Azure Database for PostgreSQL, the native applications can be enhanced, as we can use different tools to connect the database, but I believe the browser on the Azure por...
What is your primary use case for Azure Database for PostgreSQL?
My main use case for Azure Database for PostgreSQL involves migration from on-premise to Azure Database for PostgreSQL using technologies such as a migration database DMA. A specific example of a m...
What is your experience regarding pricing and costs for Faiss?
I did not purchase FAISS through the AWS Marketplace because FAISS is an open-source product. My experience with pricing, setup cost, and licensing is straightforward, as there is no cost for acqui...
What needs improvement with Faiss?
I currently do not think there is anything to be improved based on our experience, as Faiss performs as we expected for our workflow. I would like to see improvement in the fact that FAISS currentl...
What is your primary use case for Faiss?
My main use case for FAISS is in a retrieval-augmented generation project using it with OpenAI, where we use FAISS to store our embeddings created by the Colbert model and for retrieval as well. In...
 

Overview

 

Sample Customers

Information Not Available
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
Find out what your peers are saying about Azure Database for PostgreSQL vs. Faiss and other solutions. Updated: November 2026.
920,769 professionals have used our research since 2012.