Client Side

SiteSpect's client-side A/B testing and personalization solution offers the most compelling way to meet your conversion goals. Other client-side and A/B testing platforms rely on JavaScript tags, which disrupt site performance, data quality, and scalability. But SiteSpect's Find and Replace is the fastest, most robust A/B testing and optimization solution out there. Whether you’re a marketer using the Visual Editor or a developer leveraging the power of regular expressions or you’re somewhere in between, we've got you covered.


Other Solutions

High Performance
without Flicker

  • SiteSpect’s Proxy architecture built from the ground up avoids flicker and ensures a fast experience across desktop, tablet, and mobile devices.

  • JavaScript tag-based solutions make you choose between adding flicker (asynchronous) or adding latency (synchronous). There's no way to avoid these with tag-based A/B testing and optimization solutions.

One Platform, One

  • Implement SiteSpect once and get full client- and server-side A/B testing and optimization capabilities out of the box. We will never force you to reimplement or switch to a different version.

  • Others have separate client-side and server-side A/B testing and optimization solutions, each with its own implementations.

Optimizing Journeys,
not Just Pages

  • SiteSpect's client-side A/B testing and optimization solution allows unlimited changes across all web pages, devices, and channels. Easily A/B test and personalize entire customer journeys quickly.

  • Tag-based A/B testing and optimization solutions often fail when you use them to create an experience that makes multiple changes on several pages.


  • SiteSpect’s elegant architecture sits in the flow of traffic. This high level of visibility leads to better data accuracy and other advantages:

    • SiteSpect sees and captures any browser or web server event.
    • SiteSpect allows you to adjust traffic volume at any time before or during the campaign without affecting existing visits and data.
    • SiteSpect provides flexible ways to count users who are exposed to variations.
    • SiteSpect doesn’t kick users out of a campaign when you pause it.
  • JavaScript tag based A/B testing and optimization solutions have several data issues:

    • They collect inaccurate data from browser misfires and page abandonment.
    • They expire assignments after you adjust traffic volume.
    • They count users who weren’t exposed to a variation.
    • They switch users to another variation when they are kicked out of a paused campaign.

Campaign Volume

  • JavaScript optimization solutions often see massive latency when running multiple campaigns simultaneously.

Security and

  • There are no JavaScript optimization solutions that are PCI certified by a third-party vendor.

Deployment Flexibility

  • With SiteSpect, you can deploy on-premise behind your firewall, in a third-party’s cloud service like AWS or Azure, or in the SiteSpect Cloud.

  • JavaScript tag-based A/B testing and optimization solutions offer only a cloud deployment option.

Advanced QA with User Spoofing

  • SiteSpect allows you to preview any experience as any user for combinations of locations, devices, past behavior, referral URLs, cookies, or headers.

  • JavaScript tag-based A/B testing and optimization solutions struggle to QA campaigns by pretending to be a user from different locations, devices, or behaviors.

Single Page
Applications (SPA),
React JS, Angular JS

  • SiteSpect lets you optimize any SPA framework (React, Angular, etc.). The Visual Editor fully supports SPA optimization. A/B test or personalize your application using client-side or server-side techniques.

  • JavaScript tag-based A/B testing and optimization solutions often have difficulty supporting SPAs and do not support a Visual Editor.

Actionable Alerts

  • Every second counts, which is why SiteSpect sends you automated and actionable alerts for any campaign including winners, losers, poor performing variations, traffic warnings, and conflicts.

  • Other A/B testing and optimization solutions don’t actively notify you when something happens to your campaign; you won’t know when it’s broken.


  • Monitor the state and workflow of every campaign in every stage of the optimization cycle.

  • You cannot see the current state of your optimization program across all campaigns.


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