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Glassbox vs Optimizely comparison

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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
4th
Average Rating
7.8
Number of Reviews
10
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) (18th), Feature Management (4th)
 

Mindshare comparison

As of September 2026, in the Web Analytics category, the mindshare of Glassbox is 3.4%, up from 3.2% compared to the previous year. The mindshare of Optimizely is 4.3%, up from 3.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Analytics Mindshare Distribution
ProductMindshare (%)
Glassbox3.4%
Optimizely4.3%
Other92.3%
Web Analytics
 

Featured Reviews

James Dascole - PeerSpot reviewer
Manager at Charter Communications
Customer journeys have become clearer and real-time insights now highlight needed reporting improvements
One improvement I want to mention is that the way I had Glassbox set up was through the data layer; I am a technical person, so I used a Google Dev screen to search within Glassbox for segments rather than using the Adobe API connection, which I think would have been preferable since others have reported better success with that. I give Glassbox a seven because I would have preferred it connected through Adobe rather than through the data layer, which complicates training for non-technical staff to build custom reports; having the Adobe API set up would have made finding Adobe segments easier.
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 has reduced the turnaround time of customer incidents, and it is saving a lot of time and money for us."
"One specific outcome I can share about Glassbox is a decrease in customer complaints because as soon as I catch an issue, as soon as there is an event where a particular issue is occurring and it crosses the threshold, the system sends an event and I can check that user session to see what is happening and address that issue immediately and resolve it."
"I have noted a return on investment since employees previously took two days to manually identify data, but now they complete the same work within four hours thanks to Glassbox, which reduces working hours and translates into cost savings for us."
"Glassbox has helped us save considerable money and time."
"Glassbox is a tool I use all the time; it is one of our most popular tools."
"I have seen a return on investment, having saved a lot of money and time."
"The customer support is nice; we have a quite strict partnership with continuous feedback, workshops, and they are listening to us because the client is quite important, so it is fine."
"Glassbox positively impacted our organization because we got a one-stop solution to track all different journeys, different dashboards, and different applications."
"Customer service is the best in the testing industry; transparent support along with a very strong community."
"Optimizely is a great product that has inspired a great community and is the standard for A/B testing."
"ROI: Infinite! (Got 3X conversion improvement using suggestions given by the product during the free evaluation period)"
"Customer service is wonderful."
"Dead simple A/B testing with no code knoweldge needed."
"Customer service is excellent!"
"Optimizely can work for a lot more things than only testing; it is a pretty easy yet powerful tool."
 

Cons

"Glassbox can be improved because it is somewhat complex and there is a steep learning curve that requires training."
"I choose a seven because, despite helping in user behavior and error counting, session replays have been a significant pain point for me, and UI navigation can become complex."
"Glassbox is powerful, but I think the user interface could be more intuitive for new users."
"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."
"Glassbox can be improved in various ways. I think performance and lag are areas needing improvements."
"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."
"I give Glassbox a seven because I would have preferred it connected through Adobe rather than through the data layer, which complicates training for non-technical staff to build custom reports; having the Adobe API set up would have made finding Adobe segments easier."
"Glassbox is not stable in my experience. Glassbox often has downtime and technical issues; reports are not loading and there are login errors."
"Does not allow multipage variants (i.e. allows only variants in elements inside one page)."
"Better communication with 3rd party implementation"
"Verifying goals could be easier."
"Exporting statistics provide more statistical data."
"There were previously issues with experiments saving as expected in Classic."
"When testing images or anything involving JavaScript or more than text, they can really slow down the load performance of a page."
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Top Industries

By visitors reading reviews
Computer Software Company
18%
Financial Services Firm
14%
Manufacturing Company
13%
Outsourcing Company
10%
Outsourcing Company
12%
Computer Software Company
10%
Manufacturing Company
7%
Construction Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business2
Large Enterprise9
By reviewers
Company SizeCount
Small Business3
Large Enterprise5
 

Questions from the Community

What is your experience regarding pricing and costs for Glassbox?
Pricing was fair; while I did not directly manage the budget, we continually renewed at a great rate.
What needs improvement with Glassbox?
One improvement I want to mention is that the way I had Glassbox set up was through the data layer; I am a technical person, so I used a Google Dev screen to search within Glassbox for segments rat...
What is your primary use case for Glassbox?
My main use case for Glassbox is customer journey mapping. I use Glassbox for mapping the customer journey by looking between starting pages and end pages, finding where customers veer off, closing...
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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: September 2026.
913,683 professionals have used our research since 2012.