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    Overview
    ProductRatingMost Used ByProduct SummaryStarting Price

    Google Tag Manager

    Score9.5 out of 10
    N/AFrom Google, the Google Tag Manager is a tag management application that facilitates creating, embedding, and updating tags across websites and mobile apps. It is a free option, vs. the company's enterprise-tier Google Tag Manager 360.

    $0

    Selenium

    Score8.1 out of 10
    N/ASelenium is open source software for browser automation, primarily used for functional, load, or performance testing of applications.N/A
    Pricing
    Google Tag ManagerSelenium
    Editions & Modules
    No answers on this topic
    No answers on this topic
    Offerings
    Pricing Offerings
    Google Tag ManagerSelenium
    Free Trial
    NoNo
    Free/Freemium Version
    YesNo
    Premium Consulting/Integration Services
    NoNo
    Entry-level Setup FeeNo setup feeNo setup fee
    Additional Details——
    More Pricing Information
    Community Pulse
    Google Tag ManagerSelenium
    Considered Both Products
    Google
    No answer on this topic
    Open Source
    No answer on this topic
    Key User Insights
    Would buy again
    93%
    Would buy again
    14 Answers
    100%
    Would buy again
    18 Answers
    Delivers good value for the price
    100%
    Delivers good value for the price
    14 Answers
    100%
    Delivers good value for the price
    18 Answers
    Happy with the feature set
    100%
    Happy with the feature set
    15 Answers
    94%
    Happy with the feature set
    17 Answers
    Lived up to sales and marketing promises
    100%
    Lived up to sales and marketing promises
    11 Answers
    100%
    Lived up to sales and marketing promises
    13 Answers
    Implementation went as expected
    93%
    Implementation went as expected
    13 Answers
    100%
    Implementation went as expected
    16 Answers
    Features
    Google Tag ManagerSelenium
    Security
    Comparison of Security features of Google Tag Manager and Selenium
    Feature
    Google Tag Manager
    8.9
    58 Ratings
    5% above category average
    Selenium
    -
    Ratings
    Role-based user permissions8.958 Ratings00 Ratings
    Tag Management
    Comparison of Tag Management features of Google Tag Manager and Selenium
    Feature
    Google Tag Manager
    8.8
    68 Ratings
    8% above category average
    Selenium
    -
    Ratings
    Tag library9.263 Ratings00 Ratings
    Tag variable mapping8.955 Ratings00 Ratings
    Ease of writing custom tags7.367 Ratings00 Ratings
    Rules-driven tag execution8.162 Ratings00 Ratings
    Tag performance monitoring10.056 Ratings00 Ratings
    Page load times8.849 Ratings00 Ratings
    Mobile app tagging9.334 Ratings00 Ratings
    Library of JavaScript extensions8.838 Ratings00 Ratings
    Data Management & Integrity
    Comparison of Data Management & Integrity features of Google Tag Manager and Selenium
    Feature
    Google Tag Manager
    7.6
    69 Ratings
    7% below category average
    Selenium
    -
    Ratings
    Event tracking8.666 Ratings00 Ratings
    Mobile event tracking9.347 Ratings00 Ratings
    Data distribution management8.841 Ratings00 Ratings
    Universal data layer8.358 Ratings00 Ratings
    Automated error checking3.045 Ratings00 Ratings
    Automation Testing
    Comparison of Automation Testing features of Google Tag Manager and Selenium
    Feature
    Google Tag Manager
    -
    Ratings
    Selenium
    10.0
    1 Ratings
    17% above category average
    Record and Automate00 Ratings10.01 Ratings
    Multi-Browser Testing00 Ratings10.01 Ratings
    Test Management00 Ratings10.01 Ratings
    Integrated Version Control00 Ratings10.01 Ratings
    Object Recognition00 Ratings10.01 Ratings
    Data-Driven Testing00 Ratings10.01 Ratings
    Testing Reports & Analytics00 Ratings10.01 Ratings
    Best Alternatives
    Google Tag ManagerSelenium
    Small Businesses
    Adobe Experience Platform Launch
    Score8.4 out of 10
    BrowserStack
    Score8.5 out of 10
    Medium-sized Companies
    Adobe Experience Platform Launch
    Score8.4 out of 10
    BlazeMeter
    Score8 out of 10
    Enterprises
    Adobe Dynamic Tag Management (discontinued)
    Score10 out of 10
    Tricentis Tosca
    Score8.8 out of 10
    All AlternativesView all alternativesView all alternatives
    User Ratings
    Google Tag ManagerSelenium
    Likelihood to Recommend
    9.7
    (73 ratings)
    9.2
    (55 ratings)
    Likelihood to Renew
    7.0
    (7 ratings)
    9.2
    (6 ratings)
    Usability
    7.1
    (18 ratings)
    8.8
    (6 ratings)
    Availability
    9.1
    (1 ratings)
    -
    (0 ratings)
    Support Rating
    2.0
    (12 ratings)
    8.3
    (11 ratings)
    Online Training
    7.3
    (1 ratings)
    -
    (0 ratings)
    Implementation Rating
    9.8
    (2 ratings)
    9.0
    (3 ratings)
    User Testimonials
    Google Tag ManagerSelenium
    Likelihood to Recommend
    Google
    I have found Google Tag Manager as the go to solution for managing all of your event and conversion tags for your website. Not only does it make it easy to manage all of your tags in the one place, it is fairly intuitive to use and there is plenty of videos and help documentation online to help set up what ever you need. No scenarios come to mind at the moment on where it is less appropriate to use.
    Incentivized
    Read full review
    Open Source
    When you have to test the UI and how it behaves when certain actions are performed, you need something that can automate the browsers. This is where Selenium comes to the rescue. If you have to test APIs and not the frontend (UI), I would recommend going with other libraries that support HTTP Requests. Selenium is good only when you have no choice but to run the steps on a browser.
    Incentivized
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    Pros
    Google
    • Selecting elements on a site [object, class, cookie, etc] (to later fire an event, send some data, etc) is very easy with triggers. Want to add an event when someone clicks on a button? Super easy. It was many many DOM selectors and you can even add custom functions if you need to do something more specific
    • In general, firing events in different circumstances is very easy mixing triggers and tags. You can track almost any element of the DOM and do whatever you want with it.
    • Testing is a great functionality. Only you can see what's on the site and you can debug it easily by seeing which events or tags were triggered and all the DOM elements involved (and why they matched the trigger).
    • Working in environments (staging, production) and versioning is easy to do, deploying changes in 2 clicks.
    Incentivized
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    Open Source
    • For any web based UI automation, Selenium is the best tool out there to automate your tests.
    • It supports multiple coding languages like Java, Python, Ruby, C# etc.. to choose from.
    • There is a huge community of users and can get many answers on StackOverFlow.
    • It has lot of other plugins to make your tests even more efficient.
    Incentivized
    Read full review
    Cons
    Google
    • There are several good integrations, but there can always be more. Native tracking for call tracking solutions, analytics providers, non-Google advertisers would be top of my list.
    • Documentation is just dreadful. Luckily there are some awesome folks out there doing crowdsourced tutorials (shout out to Simo Ahava) but by and large the Google Tag Manager instructions are worth what you pay for them.
    Incentivized
    Read full review
    Open Source
    • Selenium is pretty user-friendly but sometimes tests tend to flake out. I'd say roughly one out of twenty tests yields a false positive.
    • Selenium software cannot read images. This is a minor negative because a free plug-in is available from alternate sources.
    • Slowness may be a minor factor with Selenium, though this is an issue with basically any testing software since waiting on a site to execute JavaScript requires the browser to wait for a particular action.
    Incentivized
    Read full review
    Likelihood to Renew
    Google
    I haven't found another option for us to use especially one that is free. Down the road we may go a different route but for now GTM is a good option and does what we need it to do. It'd be nice to get more support or more integrations but with the free version there's only so much one can expect to get I suppose.
    Incentivized
    Read full review
    Open Source
    We love this product mainly because of its high customization abilities and the ease of use. Moreover, its free and can be learned easily through online communities and videos. The tests are more consistent and reliable as compared to Manual tests. It has enabled us to test a large number of features all in one go, which would have impossible through manual tests. The reports generated at the end of the tests are really helpful for the QA and the development teams to get a fair view of the application.
    Incentivized
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    Usability
    Google
    No difficult obstacle to overcome but Google Tag Manager can still be difficult for many users to deploy. Sure the basic HTML script can be deployed quite easily, but when you start to require triggers, variables, etc, it can be a little daunting.
    Incentivized
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    Open Source
    For those who are unfamiliar with coding, there is a bit of a learning curve. There is plenty of helpful documentation and resources but it can take a little time to get the software up and running. Once you get the hang of how Selenium works, and what it can do, you realize how many things you can use it for, and how many processes you can automate.
    Incentivized
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    Support Rating
    Google
    GTM does not provide support. This is one of GTM's biggest issues but it's due to the level of customization for each website. If your team thinks they would heavily rely on the need for a support staff it is probably better to invest in a paid service with a team that can support your needs.
    Incentivized
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    Open Source
    The Selenium app has a pretty fat community of users. For the problems we are experiencing, we are primarily receiving support from these communities. In addition, there is widespread service support. Instant support is given to the problems we experience when we need Online support. We and our team are happy to provide this support, especially before important deployment processes
    Read full review
    Online Training
    Google
    I thought there was a little bit too much emphasis on AdWords stuff, not enough on the generic application of GTM.
    Read full review
    Open Source
    No answers on this topic
    Implementation Rating
    Google
    Planning and communication will help greatly with an in-house implementation. If there are large teams, try to limit the number of people involved to 1-2 developers (back-end dev may be necessary depending on your platform), one analytics marketer and one project manager.
    Incentivized
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    Open Source
    We did everything we needed to use it. Now we can execute our tests on different operational systems and browsers running few tests simultaneously. We also implemented Appium framework to execute our tests on mobile devices, such as iPhones, iPads, Android phones and tablets. We use SauceLabs for our test execution and Jenkins for continuous integration.
    Incentivized
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    Alternatives Considered
    Google
    We moved to GTM from a standard Google Analytics implementation. GTM is much more flexible and easier to make changes, especially as the changes relate to multiple sites and environments. While there is a learning curve when figuring out how to use GTM, I believe the change has been worth it because it helps us understand at a more fundamental level how our tracking works and gives us a lot more control over what we track and how.
    Incentivized
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    Open Source
    At the time of adoption, there were not many other alternatives that were even close to being competitive when it comes to browser testing. As far as I know now to this day, there is still little competition to Selenium for what it does. Any other browser-based testing still utilises Selenium to interact with the browser.
    Incentivized
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    Return on Investment
    Google
    • GTM is very useful to determine if a particular element on the site is useful (i.e. is it being watched, is it being clicked, does it help customers navigate through more pages). As an SEO person, I can use this information to decide what to optimize for but also to track progress and see improvements in engagement.
    • With the use of Google Tag Manager, I was able to easily inject an A/B testing tool which lead to several improvements in lead generation.
    Incentivized
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    Open Source
    • There hasn’t been a downside to using it yet other than we’ve got to update the programs we create for each change.
    • This has saved us hundreds of hours of manpower by allowing our automation engineer to rapid fire tests.
    • We are able to screenshot and save entire sites before and after launch with a program the automation engineer created
    • We can compare large volumes of data against data in excel docs with a program created using Selenium
    Incentivized
    Read full review
    ScreenShots