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Faiss vs VictoriaMetrics comparison

 

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

Faiss
Ranking in Open Source Databases
12th
Average Rating
8.0
Reviews Sentiment
3.3
Number of Reviews
3
Ranking in other categories
Vector Databases (13th)
VictoriaMetrics
Ranking in Open Source Databases
16th
Average Rating
9.0
Reviews Sentiment
7.3
Number of Reviews
2
Ranking in other categories
IT Infrastructure Monitoring (45th)
 

Mindshare comparison

As of June 2026, in the Open Source Databases category, the mindshare of Faiss is 3.3%, down from 3.9% compared to the previous year. The mindshare of VictoriaMetrics is 1.7%, up from 0.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Open Source Databases Mindshare Distribution
ProductMindshare (%)
Faiss3.3%
VictoriaMetrics1.7%
Other95.0%
Open Source Databases
 

Featured Reviews

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.
YS
Site Reliability Engineer at a tech vendor with 5,001-10,000 employees
High-performance monitoring has reduced costs and now supports long-term observability
Overall, VictoriaMetrics is a very strong tool. One area for improvement is documentation and learning resources. While the documentation is good, some advanced use cases and configuration could be explained more clearly with real-world examples. Another improvement would be the UI and built-in visualization. VictoriaMetrics mainly relies on tools like Grafana, so having a more feature-rich native UI for basic monitoring and exploration would be helpful. On the integration side, while it works great with Prometheus and Grafana, expanding native integration with more tools like CI/CD platforms, alerting systems, and cloud-native services would be beneficial. In terms of support and troubleshooting, having more built-in diagnostics or guided debugging tools would be helpful. Right now, when issues happen, it often relies on logs and external tools. Also, for enterprise usage, strong features like RBAC, audit logs, and multi-tenant management would be enhanced. The improvements would include UI and built-in visualization. Also, query complexity can be a bit challenging for new users. Simplifying it or providing better guidance for query building would improve usability. Finally, enterprise features and ecosystem integration could be expanded further.

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."
"We observed that RAM was reduced by around 70% and disk usage by 75%, while write speed increased 3x and query per second P95 latency became 7x faster."
"VictoriaMetrics is an excellent solution for time-series monitoring with outstanding performance."
 

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 main area that needs improvement in VictoriaMetrics is the documentation itself, as the support is adequate and the open-source project does provide replies within one to two days."
"One area for improvement is documentation and learning resources."
 

Pricing and Cost Advice

"It is an open-source tool."
"Faiss is an open-source solution."
Information not available
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Use our free recommendation engine to learn which Open Source Databases solutions are best for your needs.
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Top Industries

By visitors reading reviews
Financial Services Firm
15%
Comms Service Provider
10%
Manufacturing Company
9%
Computer Software Company
9%
Financial Services Firm
18%
Comms Service Provider
11%
Outsourcing Company
9%
Transportation Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
No data available
 

Questions from the Community

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...
What is your experience regarding pricing and costs for VictoriaMetrics?
The pricing was very good as I am following a subscription-based model. As of now, I have a better dashboard to view my monthly and yearly bills. It is very helpful to reallocate my budget to accom...
What needs improvement with VictoriaMetrics?
Overall, VictoriaMetrics is a very strong tool. One area for improvement is documentation and learning resources. While the documentation is good, some advanced use cases and configuration could be...
What is your primary use case for VictoriaMetrics?
My main use case is storing and querying the time-series metrics for monitoring and observability. I primarily use it as a high-performance back end for Prometheus, where it handles large volumes o...
 

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
Information Not Available
Find out what your peers are saying about Faiss vs. VictoriaMetrics and other solutions. Updated: June 2026.
899,324 professionals have used our research since 2012.