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IBM Watson Discovery vs Pulse Elasticsearch and OpenSearch 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

IBM Watson Discovery
Ranking in Indexing and Search
10th
Average Rating
7.8
Number of Reviews
4
Ranking in other categories
No ranking in other categories
Pulse Elasticsearch and Ope...
Ranking in Indexing and Search
16th
Average Rating
8.6
Number of Reviews
2
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2026, in the Indexing and Search category, the mindshare of IBM Watson Discovery is 3.1%, down from 4.8% compared to the previous year. The mindshare of Pulse Elasticsearch and OpenSearch is 1.4%. It is calculated based on PeerSpot user engagement data.
Indexing and Search Mindshare Distribution
ProductMindshare (%)
IBM Watson Discovery3.1%
Pulse Elasticsearch and OpenSearch1.4%
Other95.5%
Indexing and Search
 

Featured Reviews

Geraldo Lima - PeerSpot reviewer
Sales Director at Kukac
Stable, scalable, and has testing and conversational AI features
The total time it takes to deploy IBM Watson Discovery depends on the documents you'll be working with. For example, I was in a situation where I was working with some painting files and folders for a painting store. The store had PDF documents, but the information was mixed up, so I had to treat the documents on IBM Watson Discovery, and discovering and understanding each PDF file took longer. The process is more straightforward for plain documents, and you have to work with questions that will help IBM Watson Discovery understand the documents. The time to deploy the product depends on the quantity and type of documents you'll be working with.
Rafayel Agamyan - PeerSpot reviewer
DevOps Engineer at a tech vendor with 1,001-5,000 employees
Search performance has transformed customer document access and continues to improve satisfaction
Customer satisfaction has significantly improved since switching to Pulse Elasticsearch and OpenSearch from old legacy services, as many insights from customers indicate that latency has changed dramatically and the speed is significantly better now. For others looking into using Pulse Elasticsearch and OpenSearch, it is definitely recommended to give it a try, especially if old legacy systems that are slow are currently being used. Lately, OpenSearch has come up with a new version that greatly enhances speed, so trying it is encouraged and it will be loved. A review rating of 9 reflects the overall satisfaction with Pulse Elasticsearch and OpenSearch.

Quotes from Members

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

Pros

"The most valuable features of IBM Watson Discovery are the integration with the rest of the Watson Suite and the Watson Assistant capability. If you use Watson Assistant, the ability for it to be able to determine the accuracy of your voice models and your voice response systems is a benefit."
"Being able to have some rules to extract the entities is valuable. The capability to crawl external sites and internal documents, and then draw internal information with external contents is also valuable."
"Language support and the ability to build a natural language of speech recognition are the most valuable features."
"The most valuable feature of IBM Watson Discovery is testing, mainly because the product applies conversational AI, which means I can ask questions to get the information I want from a specific test area."
"It has allowed us to provide longer service availability for support to users."
"Being able to have some rules to extract the entities is valuable."
"Customer satisfaction has significantly improved since switching to Pulse Elasticsearch and OpenSearch from old legacy services, as many insights from customers indicate that latency has changed dramatically and the speed is significantly better now."
"It is quite easy, and I think it was really great the way they offered the services."
 

Cons

"It needs a lot of memory. Our index is very big. It is around 100 gigabytes. So, we need more than 100 gigabytes of memory to use Watson."
"The support from IBM Watson Discovery is good but could improve to make it great."
"There are probably other chatbots out there that were built for specific use cases and are easier to deploy than this."
"The pricing is an area for improvement in IBM Watson Discovery because the customer initially used the free version. Still, when he needed more questions and documents, he had to move to a different version, which was paid and cost $500 per month. That change in pricing made my company lose many customers."
"IBM Watson Discovery has moved to a newer version and it is very difficult to train the newer version."
"There are probably other chatbots out there that were built for specific use cases and are easier to deploy than this. Having said that, Watson is way more flexible. While it may require a greater amount of effort, it is not substantially more than some of the other ones that are kind of prebuilt for a specific use case. It would be good to have more prebuilt and specific use cases and specific business models. It can have better phone integration, even though I think that it is actually becoming less of an issue. Most people are online nowadays."
"I think the way they support the ingesting service for Pulse Elasticsearch and OpenSearch is not really great."
 

Pricing and Cost Advice

"IBM Watson Discovery is an expensive product."
"Cost-wise, it is very reasonable because it is cloud-based."
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Top Industries

By visitors reading reviews
No data available
Construction Company
31%
Financial Services Firm
15%
Healthcare Company
11%
Government
6%
 

Company Size

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

Questions from the Community

Ask a question
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What is your primary use case for Pulse Elasticsearch and OpenSearch?
My primary use case is powering up the search in the product.
What advice do you have for others considering Pulse Elasticsearch and OpenSearch?
I have not used the SQL query support feature. I did assess the RESTful API support. I have not utilized Pulse Elasticsearch and OpenSearch machine learning features, as there was no use case for m...
What needs improvement with Pulse Elasticsearch and OpenSearch?
I think the way they support the ingesting service for Pulse Elasticsearch and OpenSearch is not really great. If I got to attach a few more records, they don't support it. It's all rewrite every t...
 

Overview

 

Sample Customers

Prudential, Bradesco, Woodside
Information Not Available
Find out what your peers are saying about IBM Watson Discovery vs. Pulse Elasticsearch and OpenSearch and other solutions. Updated: August 2026.
909,725 professionals have used our research since 2012.