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Faiss vs VictoriaMetrics comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Jul 16, 2026

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
14th
Average Rating
8.0
Reviews Sentiment
3.3
Number of Reviews
3
Ranking in other categories
Vector Databases (15th)
VictoriaMetrics
Ranking in Open Source Databases
10th
Average Rating
8.6
Reviews Sentiment
6.7
Number of Reviews
12
Ranking in other categories
Application Performance Monitoring (APM) and Observability (16th), Server Monitoring (4th), IT Infrastructure Monitoring (12th), Log Management (12th), Container Monitoring (7th), Cloud Monitoring Software (14th), AIOps (13th), AI Observability Services (1st)
 

Mindshare comparison

As of November 2026, in the Open Source Databases category, the mindshare of Faiss is 2.9%, down from 3.5% compared to the previous year. The mindshare of VictoriaMetrics is 2.0%, up from 1.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Open Source Databases Mindshare Distribution
ProductMindshare (%)
VictoriaMetrics2.0%
Faiss2.9%
Other95.1%
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.
reviewer2911872 - PeerSpot reviewer
DevOps Engineer
Long term metrics monitoring has improved AI workflows and now powers faster incident analysis
The best features VictoriaMetrics offers in my experience include fast query performance and efficient resource usage, seamless compatibility with the Prometheus ecosystem, a simple cluster architecture with minimal components, MetricsQL with useful functions beyond PromQL, and comprehensive tooling like VMAgent and VMAlert. VictoriaMetrics stands out to me because it is highly efficient, stable, and easy to run in air-gapped environments. It integrates well with Prometheus ecosystem tools like Kube-Prometheus-Stack and Grafana. Its compact storage and fast query performance make it ideal for long-term metric storage. The cluster setup is simple and scalable, which is a big advantage for production use.

Quotes from Members

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

Pros

"I used Faiss as a basic database."
"The product has better performance and stability compared to one of its competitors."
"VictoriaMetrics stands out to me because it is highly efficient, stable, and easy to run in air-gapped environments, integrates well with Prometheus ecosystem tools like Kube-Prometheus-Stack and Grafana, and its compact storage and fast query performance make it ideal for long-term metric storage."
"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 has positively impacted my organization because we were able to save on metric storage by not using expensive solutions from other vendors."
"The light-speed query feature has made a significant difference for me because when we query, it is much faster in VictoriaMetrics compared to the other tools we had used previously."
"VictoriaMetrics customer support is exceptional, responses are very quick, and the solutions are usually worked through."
"VictoriaMetrics has positively impacted my organization as it is a stable, performant, safe, and well-engineered piece of software which works exactly as expected and delivers stable results."
"VictoriaMetrics works very fast and efficiently, and it is easy to set up and run."
"VictoriaMetrics has positively impacted our organization because we chose it for efficiency, simplicity, one binary and cost, and it's straightforward embedded in our Helm chart, so it works out of the box."
 

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 could be more accessible for handling larger data sets."
"It would be beneficial if I could set a parameter and see different query mechanisms being run."
"From my project experience, I would appreciate more practical guidance on tuning queries and diagnosing missing or delayed metrics across the ingestion pipeline."
"The reason I rate it eight is that the solution lacks aggregation and I have to either use a custom solution or solutions from other vendors."
"Regarding performance gains or cost savings, I can add that native multitenancy is only in the cluster version, and on single-node, we had to build tenant isolation ourselves with labels and query filters, so this could be improved."
"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."
"However, for people who want to go into the enterprise version, I think VictoriaMetrics needs to work on the pricing because it is quite high even if someone uses a single cluster."
"The main areas of improvement for VictoriaMetrics include automatic rebalancing, a large ecosystem, and Enterprise features."
"I chose exactly 8 out of 10 because I do not have full knowledge of the product in production, and my experience stopped at the testing phase pending the company's evaluation."
"I chose an eight out of ten because for a perfect score of ten, VictoriaMetrics would need to be effortless to install, set up, run, and use—essentially, it should just work without me having to do anything."
 

Pricing and Cost Advice

"It is an open-source tool."
"Faiss is an open-source solution."
Information not available
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Top Industries

By visitors reading reviews
Financial Services Firm
15%
Comms Service Provider
10%
Manufacturing Company
9%
Computer Software Company
8%
Outsourcing Company
21%
Comms Service Provider
13%
Financial Services Firm
11%
Manufacturing Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business3
Midsize Enterprise2
Large Enterprise2
 

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?
Regarding pricing, setup cost, and licensing, we are using open source today.
What needs improvement with VictoriaMetrics?
Regarding performance gains or cost savings, I can add that native multitenancy is only in the cluster version, and on single-node, we had to build tenant isolation ourselves with labels and query ...
What is your primary use case for VictoriaMetrics?
VictoriaMetrics is our time-series store, and we have Helm charts that ship an embedded single-node VictoriaMetrics with 30-day rotation by default. Teams that already run VictoriaMetrics can point...
 

Comparisons

 

Also Known As

No data available
VictoriaMetrics Observability Enterprise Support
 

Interactive Demo

Demo not available
 

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
CERN, Grammarly, Adidas, Spotify R&D, DreamHost, Traefik Labs, DSV, MHI Vestas
Find out what your peers are saying about Faiss vs. VictoriaMetrics and other solutions. Updated: November 2026.
921,665 professionals have used our research since 2012.