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Glassbox vs Optimizely 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

Glassbox
Ranking in Web Analytics
6th
Average Rating
8.6
Number of Reviews
4
Ranking in other categories
Customer Data Analysis (2nd)
Optimizely
Ranking in Web Analytics
13th
Average Rating
9.2
Number of Reviews
7
Ranking in other categories
Digital Experience Platforms (DXP) (13th), Feature Management (4th)
 

Mindshare comparison

As of June 2026, in the Web Analytics category, the mindshare of Glassbox is 3.5%, down from 4.0% compared to the previous year. The mindshare of Optimizely is 4.2%, up from 3.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Analytics Mindshare Distribution
ProductMindshare (%)
Glassbox3.5%
Optimizely4.2%
Other92.3%
Web Analytics
 

Featured Reviews

reviewer2816604 - PeerSpot reviewer
SRE at a tech vendor with 10,001+ employees
Session insights have transformed how we detect user errors and prioritize fixes across regions
Glassbox now has GIA as an AI integration that provides analysis very quickly without needing to watch the entire session. Based on previous results, the analysis is accurate 90 to 95 percent of the time regarding possible reasons why a user faced an issue. Based on that analysis, we can make a report and get things done to prevent errors. The best features that Glassbox offers are reporting and the funnel. These two use cases help us most as we can determine the expected count for user behavior and compare it to earlier weeks and days from the same period. In the report section, we can identify specific alerts that are being triggered on a regular basis so we can capture and analyze them and fix them in the longer term. The funnel feature helps us check user impact and identify which countries or specific areas the website is failing in. With this feature, if a customer is facing a cart page error, we can check how many users were impacted at that specific time and which regions those users are experiencing errors. We can also check what products those customers are trying to add. Based on that information, we can create a report and check comparisons. When we share it with the business team, they can determine if the issue is widespread and work on it with higher priority, or if it has lower impact with fewer users affected, indicating an intermittent error that can be worked on with lower priority. Glassbox has had a positive impact on my organization through all the features it provides. As AI is advancing and its adaptability within the app itself integrates many use cases, the reports, funnels, dashboards, GIA features, and integrations that Glassbox provides help us address issue behavior and work on resolutions. Additionally, it creates reports that we can share with other teams so they can determine if the impact is wider. To prevent errors quickly, Glassbox captures reproducible customer errors. If an error is not reproducible, Glassbox does not capture it and can mark it as a false alert. This is how we prevent false alerts and capture only genuine alerts.
it_user623373 - PeerSpot reviewer
AB Testing and Web Optimization Specialist at a manufacturing company with 1,001-5,000 employees
It's given us a powerful tool that's doesn't limit our test ideas by the confines of code we can or cannot use.
Ease of building the test via HTML, Java, and CSS. It's given us a powerful tool that's doesn't limit our test ideas by the confines of code we can or cannot use The thoroughness of results has helped our company make better decisions for our website. Decisions that help our customers with their…

Quotes from Members

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

Pros

"Glassbox positively impacted our organization because we got a one-stop solution to track all different journeys, different dashboards, and different applications."
"One of the biggest benefits of using Glassbox is faster issue identification and better visibility into customer experience problems."
"I have seen a return on investment, having saved a lot of money and time."
"Glassbox has helped us save considerable money and time."
"ROI: Infinite! (Got 3X conversion improvement using suggestions given by the product during the free evaluation period)"
"Customer service is the best in the testing industry; transparent support along with a very strong community."
"Customer service is excellent!"
"Optimizely is a great product that has inspired a great community and is the standard for A/B testing."
"Dead simple A/B testing with no code knoweldge needed."
"Customer service is wonderful."
"Optimizely can work for a lot more things than only testing; it is a pretty easy yet powerful tool."
 

Cons

"One frustration I have experienced with Glassbox is that with large amounts of session data, it could sometimes take time to filter and narrow down the exact user journey I want to analyze."
"There are sometimes issues with Glassbox itself where some alerts do not get captured or the GIA integration does not show correct results, but it is being learned and improving."
"Glassbox can be improved in various ways. I think performance and lag are areas needing improvements."
"Glassbox can be improved because it is somewhat complex and there is a steep learning curve that requires training."
"Exporting statistics provide more statistical data."
"Verifying goals could be easier."
"Does not allow multipage variants (i.e. allows only variants in elements inside one page)."
"When testing images or anything involving JavaScript or more than text, they can really slow down the load performance of a page."
"There were previously issues with experiments saving as expected in Classic."
"Better communication with 3rd party implementation"
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Top Industries

By visitors reading reviews
No data available
Comms Service Provider
9%
Construction Company
9%
Computer Software Company
9%
Outsourcing Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business3
Large Enterprise5
 

Questions from the Community

What is your experience regarding pricing and costs for Glassbox?
My experience with pricing, setup cost, and licensing is great, and it is cost-effective. The pricing is good, and licensing is also easy.
What needs improvement with Glassbox?
There are some areas where Glassbox does not capture genuine issues. For example, during login procedures involving multifactor authentication in someone's personal use case, if a user is failing a...
What is your primary use case for Glassbox?
Our main purpose for using Glassbox is to capture user sessions and user activity on the live site. Based on that captured data, we create funnels and reports to check the customer impact for speci...
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Comparisons

 

Overview

 

Sample Customers

Bank Leumi
Sony, SalesForce, FICO, Trulia, ABC, Fox Interactive Media, The Guardian, CBS, Walt Disney Company, Clorox, Livestrong
Find out what your peers are saying about Glassbox vs. Optimizely and other solutions. Updated: May 2026.
896,942 professionals have used our research since 2012.