Crazy Egg vs. Google Analytics vs. Optimizely Web Experimentation

Overview
ProductRatingMost Used ByProduct SummaryStarting Price
Crazy Egg
Score 8.1 out of 10
N/A
Crazy Egg is a heat map web analytics product.
$24
per month
Google Analytics
Score 8.2 out of 10
N/A
Google Analytics is perhaps the best-known web analytics product and, as a free product, it has massive adoption. Although it lacks some enterprise-level features compared to its competitors in the space, the launch of the paid Google Analytics Premium edition seems likely to close the gap.
$0
per month
Optimizely Web Experimentation
Score 8.7 out of 10
N/A
Whether launching a first test or scaling a sophisticated experimentation program, Optimizely Web Experimentation aims to deliver the insights needed to craft high-performing digital experiences that drive engagement, increase conversions, and accelerate growth.N/A
Pricing
Crazy EggGoogle AnalyticsOptimizely Web Experimentation
Editions & Modules
Crazy Egg
$24.00
per month
Google Analytics 360
150,000
per year
Google Analytics
Free
No answers on this topic
Offerings
Pricing Offerings
Crazy EggGoogle AnalyticsOptimizely Web Experimentation
Free Trial
NoNoYes
Free/Freemium Version
NoYesNo
Premium Consulting/Integration Services
NoNoYes
Entry-level Setup FeeNo setup feeNo setup feeOptional
Additional Details
More Pricing Information
Community Pulse
Crazy EggGoogle AnalyticsOptimizely Web Experimentation
Considered Multiple Products
Crazy Egg
Chose Crazy Egg
I'm an advanced user of Google Analytics and have used their 'In Page Analytics' reporting before quite a bit. Google Analytics has one advantage in this regard, in that the click maps within these tools are integrated into all of the other metrics which GA provides. That said, …
Chose Crazy Egg
Google Analytics has its place and is very useful but Crazy Egg provides that extra visual benefit that makes the analytics easy to understand for everyone involved.
Chose Crazy Egg
Google Analytics offers features similar to Crazy Egg, but Crazy Egg's heatmap takes it over the edge. The heatmap goes beyond what a click-log offers by offering a big-picture view of user behavior.
Chose Crazy Egg
Crazy Egg is much better than Google Analytics at user experience analysis and making real, practical improvements to the website, but falls short on audience demographic information. We use both for different types of analysis. I prefer the user experience and ease of use in …
Chose Crazy Egg
We felt that Crazy Egg is easy to set up and use when compared to other tools. Also, the pricing is affordable so we gave it a try and it works for us.
Chose Crazy Egg
We selected Crazy Egg because it was cheaper and simpler to implement than other tools we evaluated. Other tools felt too complicated for the first step in heat mapping, but as a growing organization trying to learn more about our users, it felt like the optimal first step for …
Chose Crazy Egg
I have not used another software all that similar to Crazy Egg. I find Crazy Egg to be a unique tool to incorporate into your analytics, though I have seen similar software out there.
Chose Crazy Egg
There are a lot of tools with similar feature and closely equal pricing- This factor is the most confusing. As we need something for our website and not every tool has everything and it took time for us to understand this. We choose Crazy Egg for its ease of using and anyone …
Chose Crazy Egg
Crazy Egg a bit low on features and has a not so friendly interface. But depending on the complexity of your team/projects/experience in digital marketing, it is a great place to start. It's budget friendly. If you have an advanced analytics or A/B testing solution it's a nice …
Chose Crazy Egg
We've never used ClickTale and it was obvious that they offered a lot for businesses. The reason why we chose Crazy Egg is because it fit our business needs and scale perfectly. We do not utilize the software as much as we should; however, when we do use it, we gain a lot of …
Chose Crazy Egg
The company actually still uses Optimizely and Google Analytics as well. Optimizely works well with Crazy Egg because we can do beta testing not only to see if the conversion rate goes up (Optimizely), but also see how the user is interacting with the change (Crazy Egg). Google …
Google Analytics
Chose Google Analytics
Crazy Egg is a heat-mapping program that shows where users are clicking on a page, even if there isn't a link. It's a great companion piece to Google Analytics, but I wouldn't use it as a one-for-one replacement. Together, they can provide a great deal of help. VWO allows for …
Chose Google Analytics
Handles the basics better with minimal training and investment, but falls short at optimization work. Google Analytics has remained the backbone of our web analytics work for a very long time, so it is a nice "default" option to always have present in our programs even if we …
Chose Google Analytics
I've spoken pretty extensively already about how Adobe Analytics and Google Analytics compare, but again it's not really close between the two tools. Again, there may be some use cases where GA makes more sense (primarily if you are trying to cut down on the expenses of the …
Chose Google Analytics
Google Analytics provided all the tools that we needed. We found that the other tools were a little more difficult to use and create reports. Additionally, the integrations that Google Analytics provided was a lot more efficient in terms of what we were looking for. Very …
Optimizely Web Experimentation
Chose Optimizely Web Experimentation
Google Optimize was much less flexible for our program needs and requires Google Analytics for analysis and metrics tracking. Optimizely Web Experimentation lets you build any number of metrics which can be much more complex than standard GA goals. Optimizely Web …
Chose Optimizely Web Experimentation
The ability to do A/B testing in Optimizely along with the associated statistical modelling and audience segmentation means it is a much better solution than using something like Google Analytics were a lot more effort is required to identify and isolate the specific data you …
Chose Optimizely Web Experimentation
I'm new to Experimentations. This is the only product that I've used.
Chose Optimizely Web Experimentation
Best-in-Class Experiment Design compared to platforms like VWO and Convert. Optimizely offers a more polished and intuitive UI for setting up experiments. It feels purpose-built with lots of concurrent tests. Features like traffic allocation, audience targeting, and variation …
Chose Optimizely Web Experimentation
Optimizely is highly intuitive, allowing marketers or non-technical folks to run experiments without complicated coding. It also allows for various types of experimentation, including A/B tests, multivariate tests, and personalization. This capability will enable teams to run …
Chose Optimizely Web Experimentation
This is a platform that was already implemented when I started with my current company.
Chose Optimizely Web Experimentation
None of them have a best in class stats engine and live within an ecosystem of marketing technology products the way that Optimizely does, so the scalability of using any one of those tools is limited as compared to using Optimizely Web Experimentation.
Chose Optimizely Web Experimentation
Optimizely is more user-friendly and cost-effective, ideal for experimentation-focused teams, while Adobe Target excels in advanced personalization and seamless integration within the Adobe ecosystem, making it better suited for large enterprises.
Chose Optimizely Web Experimentation
We haven't used other Optimizely products apart from Web Experimentation.
Chose Optimizely Web Experimentation
Optimizely Web Experimentation was more robust and able to handle the broad array of sites we run than VWO. It has been a great platform to easily add additional sites onto, but still providing a universal overview of all of them, making management a simple task.
Chose Optimizely Web Experimentation
Optimizely Web Experimentation has more robust product for experimentation specialists than VWO
Chose Optimizely Web Experimentation
Better tools but more expensive
Chose Optimizely Web Experimentation
Marketing mostly focuses on small changes to static sites, which is well suited to Optimizely.
Chose Optimizely Web Experimentation
It's slightly more complicated to use, but in my experience, it has more capabilities. Also, Google Optimize was depreciated, so this is definitely the next best platform.
Chose Optimizely Web Experimentation
unbounce's Visual Editor is what I'd expect out of Optimizely Web Experimentation, but I believe it's missing. Otherwise, Optimizely Web Experimentation is better.
Chose Optimizely Web Experimentation
More complex
Chose Optimizely Web Experimentation
Less development required once the tool is fully implemented and easier to scale
Chose Optimizely Web Experimentation
Optimizely is a far more comprehensive solution. While it's true there are competitors to X Web, there's nothing to touch Optimizely's Full Stack product. Their customer support is based out of the USA, which cuts down wait times if we have questions/issues. This wasn't the …
Chose Optimizely Web Experimentation
Optimizely has better customer service if you need to talk to a person and a great library of documentation if you run into issues and want to troubleshoot yourself. Web Experimentation has allowed for our testing capabilities to grow as our research program develops. …
Chose Optimizely Web Experimentation
Google Optimize was great, but our organization already had contracts with Optimizely Web Experimentation for their other tools. unbounce wasn't really an option either mainly because it was only a landing page testing tool and had to use their platform to host the tests. We …
Chose Optimizely Web Experimentation
Optimizely is an integrated solution that supports all the performance areas and does the analytics while working on all other areas. The products I use were a lot more simple, they helped me but in a limited way so I came to search for software and tool which fitted really well.
Features
Crazy EggGoogle AnalyticsOptimizely Web Experimentation
Web Analytics
Comparison of Web Analytics features of Product A and Product B
Crazy Egg
-
Ratings
Google Analytics
8.4
11 Ratings
4% above category average
Optimizely Web Experimentation
-
Ratings
Lead Conversion Tracking00 Ratings8.110 Ratings00 Ratings
Bounce Rate Measurement00 Ratings8.410 Ratings00 Ratings
Device and Browser Reporting00 Ratings9.211 Ratings00 Ratings
Pageview Tracking00 Ratings9.011 Ratings00 Ratings
Event Tracking00 Ratings8.311 Ratings00 Ratings
Reporting in real-time00 Ratings7.910 Ratings00 Ratings
Referral Source Tracking00 Ratings8.510 Ratings00 Ratings
Customizable Dashboards00 Ratings7.910 Ratings00 Ratings
Testing and Experimentation
Comparison of Testing and Experimentation features of Product A and Product B
Crazy Egg
-
Ratings
Google Analytics
-
Ratings
Optimizely Web Experimentation
8.0
163 Ratings
5% below category average
a/b experiment testing00 Ratings00 Ratings9.0163 Ratings
Split URL testing00 Ratings00 Ratings8.5135 Ratings
Multivariate testing00 Ratings00 Ratings8.4139 Ratings
Multi-page/funnel testing00 Ratings00 Ratings7.9126 Ratings
Cross-browser testing00 Ratings00 Ratings8.197 Ratings
Mobile app testing00 Ratings00 Ratings8.175 Ratings
Test significance00 Ratings00 Ratings8.4147 Ratings
Visual / WYSIWYG editor00 Ratings00 Ratings8.1133 Ratings
Advanced code editor00 Ratings00 Ratings8.0125 Ratings
Page surveys00 Ratings00 Ratings6.217 Ratings
Visitor recordings00 Ratings00 Ratings8.418 Ratings
Preview mode00 Ratings00 Ratings7.6145 Ratings
Test duration calculator00 Ratings00 Ratings7.8112 Ratings
Experiment scheduler00 Ratings00 Ratings8.2112 Ratings
Experiment workflow and approval00 Ratings00 Ratings7.890 Ratings
Dynamic experiment activation00 Ratings00 Ratings7.574 Ratings
Client-side tests00 Ratings00 Ratings7.896 Ratings
Server-side tests00 Ratings00 Ratings7.250 Ratings
Mutually exclusive tests00 Ratings00 Ratings8.180 Ratings
Audience Segmentation & Targeting
Comparison of Audience Segmentation & Targeting features of Product A and Product B
Crazy Egg
-
Ratings
Google Analytics
-
Ratings
Optimizely Web Experimentation
8.2
152 Ratings
7% below category average
Standard visitor segmentation00 Ratings00 Ratings8.4147 Ratings
Behavioral visitor segmentation00 Ratings00 Ratings7.7122 Ratings
Traffic allocation control00 Ratings00 Ratings9.1144 Ratings
Website personalization00 Ratings00 Ratings7.8111 Ratings
Results and Analysis
Comparison of Results and Analysis features of Product A and Product B
Crazy Egg
-
Ratings
Google Analytics
-
Ratings
Optimizely Web Experimentation
8.3
149 Ratings
4% below category average
Heatmap tool00 Ratings00 Ratings9.313 Ratings
Click analytics00 Ratings00 Ratings8.833 Ratings
Scroll maps00 Ratings00 Ratings8.517 Ratings
Form fill analysis00 Ratings00 Ratings8.072 Ratings
Conversion tracking00 Ratings00 Ratings8.744 Ratings
Goal tracking00 Ratings00 Ratings8.2127 Ratings
Test reporting00 Ratings00 Ratings7.9137 Ratings
Results segmentation00 Ratings00 Ratings7.7103 Ratings
CSV export00 Ratings00 Ratings7.9102 Ratings
Experiments results dashboard00 Ratings00 Ratings8.049 Ratings
Best Alternatives
Crazy EggGoogle AnalyticsOptimizely Web Experimentation
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Smartlook
Smartlook
Score 8.6 out of 10
StatCounter
StatCounter
Score 9.0 out of 10
Convert Experiences
Convert Experiences
Score 9.9 out of 10
Medium-sized Companies
Siteimprove
Siteimprove
Score 9.0 out of 10
Siteimprove
Siteimprove
Score 9.0 out of 10
Dynamic Yield
Dynamic Yield
Score 9.0 out of 10
Enterprises
Contentsquare
Contentsquare
Score 7.4 out of 10
Optimal
Optimal
Score 9.1 out of 10
Dynamic Yield
Dynamic Yield
Score 9.0 out of 10
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User Ratings
Crazy EggGoogle AnalyticsOptimizely Web Experimentation
Likelihood to Recommend
8.0
(35 ratings)
8.5
(192 ratings)
8.7
(253 ratings)
Likelihood to Renew
8.5
(14 ratings)
9.0
(51 ratings)
9.4
(51 ratings)
Usability
10.0
(9 ratings)
7.4
(19 ratings)
10.0
(58 ratings)
Availability
7.1
(4 ratings)
10.0
(4 ratings)
10.0
(7 ratings)
Performance
2.0
(2 ratings)
10.0
(2 ratings)
7.3
(6 ratings)
Support Rating
5.0
(7 ratings)
7.0
(42 ratings)
10.0
(16 ratings)
Online Training
10.0
(1 ratings)
10.0
(2 ratings)
3.0
(1 ratings)
Implementation Rating
9.2
(3 ratings)
9.0
(7 ratings)
8.0
(11 ratings)
Configurability
-
(0 ratings)
6.0
(2 ratings)
6.0
(1 ratings)
Ease of integration
-
(0 ratings)
10.0
(1 ratings)
-
(0 ratings)
Product Scalability
9.8
(2 ratings)
10.0
(2 ratings)
8.0
(162 ratings)
Vendor post-sale
-
(0 ratings)
10.0
(1 ratings)
-
(0 ratings)
Vendor pre-sale
-
(0 ratings)
9.0
(1 ratings)
-
(0 ratings)
User Testimonials
Crazy EggGoogle AnalyticsOptimizely Web Experimentation
Likelihood to Recommend
Crazy Egg
+ I strongly believe that this tool helps when a firm has good user count (depends on business model) as most of these tools are data friends. More data - more valuable insights + Best fit if someone who is looking for deeper insights of individual page - Not suggested for very fewer visits of a website. Suggested to improve better visit count
Read full review
Google
Google Analytics is particularly well suited for tracking and analyzing customer behavior on a grocery e-commerce platform. It provides a wealth of information about customer behavior, including what products are most popular, what pages are visited the most, and where customers are coming from. This information can help the platform optimize its website for better customer engagement and conversion rates. However, Google Analytics may not be the best tool for more advanced, granular analysis of customer behavior, such as tracking individual customer journeys or understanding customer motivations. In these cases, it may be more appropriate to use additional tools or solutions that provide deeper insights into customer behavior.
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Optimizely
I think it can serve the whole spectrum of experiences from people who are just getting used to web experimentation. It's really easy to pick up and use. If you're more experienced then it works well because it just gets out of the way and lets you really focus on the experimentation side of things. So yeah, strongly recommend. I think it is well suited both to small businesses and large enterprises as well. I think it's got a really low barrier to entry. It's very easy to integrate on your website and get results quickly. Likewise, if you are a big business, it's incrementally adoptable, so you can start out with one component of optimizing and you can build there and start to build in things like data CMS to augment experimentation as well. So it's got a really strong a pathway to grow your MarTech platform if you're a small company or a big company.
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Pros
Crazy Egg
  • Provides heatmaps that shows you the elements on your site that are and aren't performing well.
  • Provides scrollmaps so you can see how far down a page users are scrolling and which content never gets seen.
  • Screenshots show you how your website looks across a variety of different devices.
  • Provides a type of clickmap called confetti that enables you visualise clicks by segments - device, new/returning visitors, campaigns and other metrics.
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Google
  • Multiple reports to see website use and behavior
  • Allows you to customize reports with days, weeks, months, and years
  • You can build out a dashboard to easily view stats from multiple websites in one place
  • You can share analytics reports via the dashboard, automatically emailed PDFs or in other formats
Read full review
Optimizely
  • The Platform contains drag-and-drop editor options for creating variations, which ease the A/B tests process, as it does not require any coding or development resources.
  • Establishing it is so simple that even a non-technical person can do it perfectly.
  • It provides real-time results and analytics with robust dashboard access through which you can quickly analyze how different variations perform. With this, your team can easily make data-driven decisions Fastly.
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Cons
Crazy Egg
  • The largest thing we've struggled with is the Optimizely integration. I've contacted customer service a few times to get it properly setup. Customer Service is always friendly and helpful; they provide clear steps to get it setup. Unfortunately despite clear instructions, they are tedious, and if not completed in the correct order, the integration with Optimizely does not work. My success rate with the integration is less than 55%.
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Google
  • Data sampling is somewhat inaccurate on the free tier - this is addressed in premium but is expensive.
  • Some of the UI is very similar in naming when presenting different data, some in-situ information might be useful.
  • Gotchas around filtering and data validation.
  • Implementation can be tricky, it can take a lot of time and expertise to get a full, accurate picture of your metrics.
Read full review
Optimizely
  • JavaScript is hard to implement sometimes especially for JQuery elements
  • ROI reporting should be part of the overall experimentation reporting
  • CMP integration: where we can easily show status of test on the HPT request
  • CMS integration
  • More widgets like social proof banners, etc.
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Likelihood to Renew
Crazy Egg
It's a great tool considering how inexpensive it is. If used correctly and you have a plan for tracking your websites, this tool can make a world of a difference. If you are not going to sit down and take the time to make a plan for how to use this tool, I would say it is not worth your time. Yes, you can look at items on your website that need to be changed, but without a consistent plan, other important items that need changing can be lost in the mix. Make sure you have enough time and energy to invest in this and it will be well worth it
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Google
We will continue to use Google Analytics for several reasons. It is free, which is a huge selling point. It houses all of our ecommerce stores' data, and though it can't account for refunds or fraud orders, gives us and our clients directional, real time information on individual and group store performance.
Read full review
Optimizely
I rated this question because at this stage, Optimizely does most everything we need so I don't foresee a need to migrate to a new tool. We have the infrastructure already in place and it is a sizeable lift to pivot to another tool with no guarantee that it will work as good or even better than Optimizely
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Usability
Crazy Egg
Crazy Egg is extremely easy to set up and use, and very well done from a user experience standpoint. It is really helpful that I can give stakeholders access to the interface and get them interacting with it with minimal training. The A/B testing is the easiest I have ever used, with minimal performance impact to the website.
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Google
Google Analytics provides a wealth of data, down to minute levels. That is it's greatest detriment: find the right information when you need it can be a cumbersome task. You are able to create shortcuts, however, so it can mitigate some of this problem. Google is continually refining Analytics, so I do not doubt there will be improvements
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Optimizely
Optimizely Web Experimentation's visual editor is handy for non-technical or quick iterative testing. When it comes to content changes it's as easy as going into wordpress, clicking around, and then seeing your changes live--what you see is what you get. The preview and approval process for sharing built experiments is also handy for sharing experiments across teams for QA purposes or otherwise.
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Reliability and Availability
Crazy Egg
It's slow to post data, and slow to get a snapshot to finally be active (i.e. not pending). Not intolerable, but would be nice to see data within a couple hours. Often have to wait to the next day.
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Google
We all know Google is at top when it comes to availability. We have never faced any such instances where I can suggest otherwise. All you need is a Google account, a device and internet connection to use this super powerful tool for reporting and visualising your site data, traffic, events, etc. that too in real time.
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Optimizely
I would rate Optimizely Web Experimentation's availability as a 10 out of 10. The software is reliable and does not experience any application errors or unplanned outages. Additionally, the customer service and technical support teams are always available to help with any issues or questions.
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Performance
Crazy Egg
No answers on this topic
Google
This has been a catalyst for improving our site's traffic handling capabilities. We were able to identify exit% from our sites through it and we used recommendations to handle and implement the same in our sites. We have been increasing the usage of Google Analytics in our sites and never had any performance related issues if we used Analytics
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Optimizely
I would rate Optimizely Web Experimentation's performance as a 9 out of 10. Pages load quickly, reports are complete in a reasonable time frame, and the software does not slow down any other software or systems that it integrates with. Additionally, the customer service and technical support teams are always available to help with any issues or questions.
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Support Rating
Crazy Egg
I think support is an area where Crazy Egg is lacking. I would love to have a quarterly check-in with a Crazy Egg rep to understand what kinds of changes have been made to the platform and what is on the horizon. I also think a quick consulting sessions with a rep could be extremely beneficial, as I'm sure there are ways to use the tool that we haven't even thought about yet that would be extremely insightful for our team.
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Google
The Google reps respond very quickly. However, sometimes they can overly call you to set up an apportionment. I'm very proficient and sometimes when I talk to reps, they give beginner tutorials and insights that are a waste of time. I wish Google would understand my level of expertise and assign me to a rep (long-term) that doesn't have to walk me through the basics.
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Optimizely
They always are quick to respond, and are so friendly and helpful. They always answer the phone right away. And [they are] always willing to not only help you with your problem, but if you need ideas they have suggestions as well.
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Online Training
Crazy Egg
Crazy Egg is the best CRO and LPO tool for performance marketers who have a limited budget!
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Google
love the product and training they provide for businesses of all sizes. The following list of links will help you get started with Google Analytics from setup to understanding what data is being presented by Google Analytics.
  1. How to Use Google Analytics for Beginners – Mahalo’s how-to guide for beginners.
  2. A beginner’s guide to Google Analytics – A free eBook walking you through Google Analytics from setup to understanding what data is being presented.
  3. Getting to Know Your Google Analytics Dashboard – The title says it all! This is a brief post with one goal: to introduce you to the Google Analytics dashboard.
  4. Google Analytics for Beginners: How to Make the Most of Your Traffic Reports– This guide doesn’t cover setup, but it does a great job of helping you to better understand the data being presented.
  5. Google Analytics Video Tutorial 1: Setup – A video presentation that walks you through Google Analytics setup.
  6. Google Analytics Video Tutorial 2: Essential Stats – A video presentation that introduces you to some of the most important data being presented in Google Analytics.
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Optimizely
The tool itself is not very difficult to use so training was not very useful in my opinion. It did not also account for success events more complex than a click (which my company being ecommerce is looking to examine more than a mere click).
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Implementation Rating
Crazy Egg
It is simple. JavaScript code needs to be added to any pages where you want to run tests. That's it.
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Google
I think my biggest take away from the Google Analytics implementation was that there needs to be a clear understanding of what you want to achieve and how you want to achieve it before you start. Originally the analytics were added to track visitors, but as we became more savvy with the product, we began adding more and more functionality, and defining guidelines as we went along. While not detrimental to our success, this lack of an overarching goal resulted in some minor setbacks in implementation and the collection of some messy data that is unusable.
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Optimizely
In retrospect: - I think I should have stressed more demo's / workshopping with the Optimizely team at the start. I felt too confident during demo stages, and when came time to actually start, I was a bit lost. (The answer is likely I should have had them on-hand for our first install.. they offered but I thought I was OK.) - Really getting an understanding / asking them prior to install of how to make it really work for checkout pages / one that uses dynamic content or user interaction to determine what the UI does. Could have saved some time by addressing this at the beginning, as some things we needed to create on our site for Optimizely to "use" as a trigger for the variation test. - Having a number of planned/hoped-for tests already in-hand before working with Optimizely team. Sharing those thoughts with them would likely have started conversations on additional things we needed to do to make them work (rather than figuring that out during the actual builds). Since I had development time available, I could have added more things to the baseline installation since my developers were already "looking under the hood" of the site.
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Alternatives Considered
Crazy Egg
I will say that I didn't evaluate or select Crazy Egg, it's been a legacy tool that has been at the company before me. Honestly, we're not even sure of all of the features/functionality that we can use. Me, as a UXR, I think there are some other tools that would help me more in gaining visibility into what our users are doing on our website. I've evaluated other tools that are more aligned with UXR. However, if we properly paired it with experimentation, this might be more of a valuable tool for us.
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Google
I have not used Adobe Analytics as much, but I know they offer something called customer journey analytics, which we are evaluating now. I have used Semrush, and I find them much better than Google Analytics. I feel a fairly nontechnical person could learn Semrush in about a month. They also offer features like competitive analysis (on content, keywords, traffic, etc.), which is very useful. If you have to choose one among Semrush and Google Analytics, I would say go for Semrush.
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Optimizely
The ability to do A/B testing in Optimizely along with the associated statistical modelling and audience segmentation means it is a much better solution than using something like Google Analytics were a lot more effort is required to identify and isolate the specific data you need to confidently make changes
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Scalability
Crazy Egg
Its reliability (not scaleability, as the question asks for, sorry) is pretty good but through our testing we know that some clicks do not get recorded. It doesn't bother us a lot because we look at the aggregate of thousands of visits, but we do know it misses things. As for scaleability, it's about right. You really don't want zillions of clicks per snapshot - the screen just turns to 100% dots and you lose the ability to differentiate different screen areas. We find that 25,000 clicks for a page gives us a really good view.
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Google
Google Analytics is currently handling the reporting and tracking of near about 80 sites in our project. And I am not talking about the sites from different projects. They may have way more accounts than that. Never ever felt a performance issue from Google's end while generating or customising reports or tracking custom events or creating custom dimensions
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Optimizely
We can use it flexibly across lines of business and have it in use across two departments. We have different use cases and slightly different outcomes, but can unify our results based on impact to the bottom line. Finally, we can generate value from anywhere in the org for any stakeholders as needed.
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Return on Investment
Crazy Egg
  • Very Positive impact on ROI as it pointed towards some specific flaws of the website. These flaws were removed on a regular basis.
  • It constantly helps finetune our website to the requirements of the users. This helps in boosting our business development efforts.
  • It helps us to remove or modify the least visited sections of the website. Thus removing the limitations that hamper our growth.
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Google
  • It has helped us gain understanding of what is going on on our website.
  • It has helped us determine areas that need fixing (i.e. pages with extremely high bounce rates may need to be redone).
  • It has helped us understand our biggest avenues for bringing traffic to the website and business in general.
  • It has helped guide our website redesign.
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Optimizely
  • We're able to share definitive annualized revenue projections with our team, showing what would happen if we put a test into Production
  • Showing the results of a test on a new page or feature prior to full implementation on a site saves developer time (if a test proves the new element doesn't deliver a significant improvement.
  • Making a change via the WYSIWYG interface allows us to see multiple changes without developer intervention.
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ScreenShots

Optimizely Web Experimentation Screenshots

Screenshot of AI-Powered Experimentation with Opal:

- Instant Test Ideas: Generates high-quality A/B test ideas based on any goals and audience insights.
- Smarter Experimentation: The AI can suggest impactful variations, reducing guesswork and increasing test velocity.
- More Than Just Ideas: From hypothesis generation to analyzing results, Opal helps optimize every stage of the experimentation process.Screenshot of the Web Experimentation Visual Editor :

- Tweak experiments using the visual editor or dive into custom code when needed.
- Modify elements, update styling, or add dynamic behaviors.
- Ensure perfect variations while keeping control over every detail of the experiment.Screenshot of AI Content Suggestions:

- Generates copy variations to supercharge experiments.
- The AI suggests high-impact messaging for tests when hovering over a field.
- AI-powered content suggestions help skip the brainstorming process.Screenshot of Advanced Audience Targeting:

- Delivers personalized experiences by targeting users based on behaviors, attributes, and real-time conditions.
- Defines precise audience segments using first-party data, geolocation, and device type.
- Can test and optimize for different audience groups to maximize impact and engagement.Screenshot of Custom Templates in the Visual Editor:

- Offers pre-built templates for common test setups.
- Standardized variations and maintains brand integrity with reusable templates.
- Templates can be customized visually or tweak them with code for full flexibility.Screenshot of the Web Experimentation Results Page:

- Data visualizations help interpret experiment performance.
- Displays which variations are winning with built-in statistical significance calculations.
- Results can be filtered by audience segments, events, and conversions to uncover key trends.