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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 October 2026, in the Web Analytics category, the mindshare of Glassbox is 3.4%, up from 3.0% compared to the previous year. The mindshare of Optimizely is 4.5%, up from 3.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Analytics Mindshare Distribution
ProductMindshare (%)
Glassbox3.4%
Optimizely4.5%
Other92.1%
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 helped us reduce the time required to investigate customer issues, improve digital experience, and make data-driven decisions."
"Glassbox is a tool I use all the time; it is one of our most popular tools."
"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."
"I have seen a return on investment, having saved a lot of money and time."
"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."
"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."
"Glassbox has helped us save considerable money and time."
"Optimizely is a great product that has inspired a great community and is the standard for A/B testing."
"Customer service is excellent!"
"Dead simple A/B testing with no code knoweldge needed."
"Customer service is the best in the testing industry; transparent support along with a very strong community."
"Optimizely can work for a lot more things than only testing; it is a pretty easy yet powerful tool."
"ROI: Infinite! (Got 3X conversion improvement using suggestions given by the product during the free evaluation period)"
"Customer service is wonderful."
 

Cons

"Glassbox is powerful, but I think the user interface could be more intuitive for new users."
"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."
"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."
"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."
"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 is not the best when it comes to back-end data and capturing things such as server time and response time."
"Glassbox can be improved because it is somewhat complex and there is a steep learning curve that requires training."
"When testing images or anything involving JavaScript or more than text, they can really slow down the load performance of a page."
"Exporting statistics provide more statistical data."
"Does not allow multipage variants (i.e. allows only variants in elements inside one page)."
"Verifying goals could be easier."
"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
Manufacturing Company
17%
Computer Software Company
17%
Financial Services Firm
13%
Comms Service Provider
9%
Outsourcing Company
14%
Computer Software Company
9%
Manufacturing Company
8%
Comms Service Provider
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.
916,956 professionals have used our research since 2012.