VWO vs Optimizely

Configure any kind of user event and event properties

Create metrics based on events and their properties with complex aggregate functions such as first value, last value, average, sum, etc.

Use brackets to create logic of targeting with multiple conditions. For example - [Users in USA OR Users in India] AND [New Users OR iOS Device]

Target based on user behavior and actions taken by the user. For example - user clicks a button, time spent on page, page scroll etc.

Target user groups based on custom events that occur on the website.

Granular control over when visitors become part of a campaign or see a survey, widget, modal, etc.

The availability of our support team to respond and resolve your queries irrespective of the timezone.

Enable single sign-on using any SAML 2.0 identity provider to authenticate members from your organization.

Host library and campaign setting files on your servers, easing your dependency on the platform's servers.

Single-page apps support

Classify your web pages into different categories to quickly create, manage and scale experiments specific to them.

Start and pause campaigns programmatically or pull test metrics into other dashboards.

Run tests on multiple domains within user journey, where user tracking and goals can be on one or more domains.

Use brackets to create logic of filtering reports with multiple conditions. For example - [Users in USA OR Users in India] AND [New users OR iOS Device]

Get accurate test reports powered by a Bayesian statistics engine

See how the users of a variation behaved with the help of heatmaps

Make use of visitors' unique attributes to analyze test performance

Simultaneously visualize and compare two or more user segments in reports for far more comprehensive insights and decision-making.

Download detailed user reports in .csv format with complete segment data, goal completion and custom dimensions.

See the results of your experiments on our Bayesian-powered reporting dashboard.

Library of customizable pre-designed UI elements like list item, content block, buttons, etc.

Use the click-and-save feature to store UI elements, such as text blocks, buttons, banners, and pop-ups, in the library for future reuse.

Control when a widget appears, how often it appears, or does not appear when dismissed.

Generate alternate text recommendations for the existing copy on your website.

Create customizable banners, pop-ups, and other web page elements with images and forms, directly within the visual editor, without coding.

Shadow DOM is a web API that can attach a hidden DOM to a DOM element.

Utilize the powerful WYSIWYG point-and-click visual editor to create and edit variations with ease, eliminating the dependency on IT.

Make advanced modifications to any aspect of your website using HTML, JavaScript, CSS, and jQuery.

Add new or edit UI elements to your webpage.

Seamlessly integrate with third-party tools.

Build and compare variations of your website to analytically determine the better performing version.

Simultaneously modify multiple variables to test a hypothesis and determine the best-performing combination of variations.

Compare various versions of your website hosted on multiple URLs by distributing website traffic among them to determine the highest-performing variation.

Easily apply the same experience to multiple pages with a single click, eliminating the need for manual duplication of changes across pages.

Run tests on mobile responsive sites

Run tests on multiple domains within user journey, where user tracking and goals can be on one or more domains.

Total number of tests you can run on your account concurrently.

Conduct a quality review of the variations by previewing them to verify that all modifications have been applied to the website before going live.

Expose the better performing variation to more users long before the test reaches statistical significance thus reducing the opportunity cost.

Ensure that a user doesn't participate in two or more running tests to eliminate result noise, bias, and test inter-play.

Track user drop-offs at different stages of form submission, from landing to interaction to submission.

Percentage of users who dropped off on a field without submitting the form.

Understand how long users spend on a specific field while actively interacting with it.

Understand how long users spend on a specific field without actively interacting with it.

Percentage of users who refilled a field on the form.

Percentage of users who did not interact with a form field and submitted the form.

Percentage of users who dropped off on a field without submitting the form.

Make your surveys smarter by asking subsequent questions based on the responses given.

Choose from a repository of frequently asked questions to select an appropriate question.

Trigger survey to users when they see a specific A/B test variation.

Write custom triggers using JavaScript to fire a survey based on an event or a specific user action.

Run an NPS survey to gauge the likelihood of users recommending the website to others.

Watch recordings of user sessions in which they responded to a survey to understand why they gave specific responses.

Add custom CSS to restyle and resize the surveys per your branding guidelines.

Filter reports based on users who dropped off from a funnel.

View heatmaps of different pages, interactive elements(such as popups, modals, and menus), and pages behind logins as you navigate your website.

View the heatmap of a particular A/B test variation.

Create a heatmap view and quickly access heatmap data for specific pages and user segments without repeating the heatmap configuration.

Track clicks on specific elements and compare them to total clicks on a page or area.

Displays a list of both visible and hidden elements with their types and show clicks on each from highest to lowest.

Filter recordings based on users who were part of a test campaign or saw a particular test variation.

Filter recordings based on parameters like entry page, exit page, visited page, etc.

Create a recording view and quickly access recordings for specific pages and user segments without repeating the recording configuration.

The number of recordings you can store for later viewing.

Filter recordings based on users who dropped off from a funnel.

Download recordings for offline sharing and viewing.

Configure multiple environments under each project to run tests in simulated environments. Ensure your changes are of production-ready quality and roll out changes confidently

Seamlessly integrate with third-party tools.

Ensure certain users are always served a specific variation by whitelisting the users based on their userID

Schedule tests at specific time/date or create recurring schedules to run tests

Test multiple variable values for a feature to determine the most optimal value

Make quick observations and audit webpages while on them, all with a handy browser plug-in.

Automatically capture snapshots of the reports as you log observations.

Prioritize ideas based on importance, complexity and ease of implementation and customize your workflow to visualize progress.

Take inspiration from hundreds of ideas, case studies, and other resources to develop your own strategy.