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PostgreSQL vs Vespa 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

PostgreSQL
Ranking in Open Source Databases
2nd
Ranking in Vector Databases
8th
Average Rating
8.4
Reviews Sentiment
7.4
Number of Reviews
127
Ranking in other categories
No ranking in other categories
Vespa
Ranking in Open Source Databases
20th
Ranking in Vector Databases
20th
Average Rating
7.8
Reviews Sentiment
5.3
Number of Reviews
4
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of June 2026, in the Open Source Databases category, the mindshare of PostgreSQL is 13.1%, down from 18.0% compared to the previous year. The mindshare of Vespa is 1.7%, up from 0.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Open Source Databases Mindshare Distribution
ProductMindshare (%)
PostgreSQL13.1%
Vespa1.7%
Other85.2%
Open Source Databases
 

Featured Reviews

Shobhit Goel - PeerSpot reviewer
Data Science Architect at publicis Sapient
High-volume transactions have reduced failures and improve customer service efficiency
The best feature is performance, because of which I decided on PostgreSQL. I have also enabled the PG vector plugin on top of PostgreSQL. I have the opportunity to use two different features and two different flavors in a single product, which is the best thing about PostgreSQL. Initially, we had some hiccups around the performance part, but later we did indexing in PostgreSQL and now it is working very well. Even when we are doing 100,000 transactions in a day, PostgreSQL is working excellently. The interface is another best feature. If I need to do any query, I simply install the plugin on my local, which is pgAdmin. Through pgAdmin, I am able to communicate with PostgreSQL and execute all my SQL queries. I am getting a better UI with PostgreSQL as the backend, which is also one of the best options. PG vector is also very strong from PostgreSQL where I have implemented RAG and on a daily basis, I inject thousands of pages of PDF. More than 100 PDFs are coming into my system and one PDF is around 1,000 pages. We are injecting them into PostgreSQL and converting them into dimensions and inserting them into PG vector. The level of transactions we are doing on a daily basis is substantial, and we are getting very good throughput and low latency from PostgreSQL. When we were doing more than 50,000 transactions in a minute with the previous database, we were getting a lot of latency issues with threads getting blocked and abruptly closed unwantedly. After doing extensive research, we decided to move to PostgreSQL. Now, we are doing around 100,000 transactions in PostgreSQL and we are getting good throughput with no latency.
Ganaraj Amakrishna - PeerSpot reviewer
Lead Technical Architect at Zoro UK
Vector search has improved e‑commerce relevance but setup and learning curve still need work
Vespa definitely had its own set of challenges. It was really hard to get into initially, especially when I started implementing it in 2024 along with one junior employee, and the lack of documentation made it difficult. I aimed for an implementation with ColBERT, a sparse embedding mechanism, which I believed would fit well for e-commerce. We went through iterations during A/B testing because the initial set did not work as expected, which extended the process to about one and a half years. Vespa has a considerable learning curve, making it challenging for most people to get into, and it is also expensive, which can deter startups or those with smaller budgets from using it. Community support was decent, and we turned to it for clarifications. However, substantial improvements in documentation are necessary, especially more examples for handling DSL effectively. Having a runtime testing feature would greatly facilitate quick iterations.

Quotes from Members

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

Pros

"We often use PostgreSQL for operations monitoring because we are a manufacturing company."
"It has completely met our needs. It works, and it is robust. We haven't had any problems with what PostgreSQL does for us and the way it does it. That's why we've been using it for so long. We understand it, and it does the job."
"This is a very good product, and I'm very pleased, especially with the latest versions."
"We use this solution as part of our backend to store data that is coming from the sensors, and it is needed to save the meter data from the sensors."
"Its reliability is key."
"It is very useful for both structured and unstructured data. You can store unstructured and structured data in PostgreSQL. It is easy to use. You can easily manage things through PostgreSQL Admin. It is cost-effective. Its on-premise version is free. It is agnostic of on-premise or cloud. You can install it on the cloud or on-premises. It is available with all clouds, and you can also install it on desktop or Windows Servers."
"PostgreSQL's feature set was excellent for our needs, and we didn't want an expensive (meaning hardware utilization) RDBMS."
"The product is free, which is a huge benefit."
"While conducting A/B testing, Vespa seemed to be performing slightly better than Elasticsearch, especially in search relevancy within live production systems, and its performance was decent."
"The most outstanding features and characteristics of Vespa include an architecture that lets you focus on implementing features, the function that automatically manages sharding and shards is excellent, and the flexibility of the server cluster and infrastructure architecture is outstanding."
"The best feature to me is the LTR feature, the ranking feature to be specific."
"Vespa is very good and it improves our product, and we got more clients."
 

Cons

"I'm not really able to customize it."
"Performance and scalability are areas where PostgreSQL can be improved."
"It needs to be able to cluster."
"If it was free to use, it would be the perfect solution."
"There could be a plugin to distribute the data on servers for the product."
"JSON support although great, it still has some gotchas, querying and manipulating JSON will be one of the topics I'd like to see some improvement, still feels not natural to work with it."
"Yes, as the database grows, one has to perform a full vacuum in order to continue to work on the database."
"The human resources, the HR, within the system needs improvement."
"We want Vespa to implement some UI features so that we can visualize how our data goes and what embeddings it stores."
"Vespa has a considerable learning curve, making it challenging for most people to get into, and it is also expensive, which can deter startups or those with smaller budgets from using it."
"There were aspects of Vespa that needed improvement, such as if a monitoring dashboard were provided—and not only the monitoring dashboard, but also related supplementary tools for the administrative aspects—that would be better."
"The integration is actually a pain."
 

Pricing and Cost Advice

"We are using the free version of PostgreSQL."
"Affordable solution."
"The community version of Postgre is basically free."
"It is an open-source platform."
"The licensing model is good."
"We use the open-source version of PostgreSQL and not the enterprise edition."
"It could be much cheaper. If you would like to build an application on Amazon today, PostgreSQL is the standard database with Redshift. If you want other databases, you can add them, but PostgreSQL is the basis of everything. It's a question of money, that's it."
"There is an annual license."
Information not available
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Top Industries

By visitors reading reviews
Financial Services Firm
12%
Computer Software Company
10%
Comms Service Provider
10%
Construction Company
7%
Computer Software Company
16%
Comms Service Provider
12%
Financial Services Firm
9%
Healthcare Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business57
Midsize Enterprise27
Large Enterprise48
No data available
 

Questions from the Community

How does Firebird SQL compare with PostgreSQL?
PostgreSQL was designed in a way that provides you with not only a high degree of flexibility but also offers you a cheap and easy-to-use solution. It gives you the ability to redesign and audit yo...
What is your experience regarding pricing and costs for PostgreSQL?
I purchased from the marketplace, so licensing and pricing cost is acceptable. To be honest, there is a separate team who handles the cost of licensing everything. I have admin access on Azure and ...
What needs improvement with PostgreSQL?
The only thing for PG vector is if the dimension limit could be increased. Currently, the dimension limit is around 1,000 to 1,052. If I need to increase the dimension to 3,000 or 5,000, that optio...
What is your experience regarding pricing and costs for Vespa?
The setup cost is definitely huge, and pricing is also steep. In terms of licensing, it seems generous for those who do not want to engage with Vespa's hosted services.
What needs improvement with Vespa?
Vespa definitely had its own set of challenges. It was really hard to get into initially, especially when I started implementing it in 2024 along with one junior employee, and the lack of documenta...
What is your primary use case for Vespa?
My main use case for Vespa is implementing it as the back-end search engine for an e-commerce site, where we have about six million products, or six million SKUs, that we are selling. I implemented...
 

Comparisons

 

Overview

 

Sample Customers

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Find out what your peers are saying about PostgreSQL vs. Vespa and other solutions. Updated: June 2026.
900,644 professionals have used our research since 2012.