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Underscore Market Report, July 2025

Technologies > JavaScript Libraries > Underscore > Reports Overview > Market Report

Get all the information about Underscore in an extensive report.

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JavaScript libraries reports

This extensive report shows many detailed statistics of the JavaScript library market with a specific focus on Underscore.

Our technology market report is a detailed monthly report on the usage of Underscore as JavaScript library on websites. The report comes via email as a PDF file and has over 400 pages covering this information:

• JavaScript Libraries Industry Reports
  • Usage and Market Share Report
    How popular is each of the JavaScript libraries? Shows percentages of usage and market shares for all 57 JavaScript libraries that we monitor. Also shows how much these figures changed compared to the last month and to the last year.
  • Historical Trend Report
    How did the popularity of the JavaScript libraries change over time? Shows tables and diagrams of historical trends of usage and market shares for all JavaScript libraries since January 2014. Please note, that we permanently keep adding more JavaScript libraries to our surveys, therefore not all of them cover the entire time frame.
  • Growth Rate Report
    Which are the fastest growing JavaScript libraries? Shows the current growth rates in the usage of all JavaScript libraries both in absolute figures and percentages in the last month and in the last year.
  • New Site Usage Report
    How popular is each of the JavaScript libraries among new sites? Shows percentages of usage and market shares for all JavaScript libraries among sites that were first visited in the last month, because they have only recently entered the top 10 million sites.
  • Top Site Usage Report
    Which JavaScript libraries are primarily used by high traffic sites? Shows for each JavaScript library the share of top sites among all the sites that use that specific JavaScript library.
  • Page Speed Report
    What is the average speed when loading pages of different JavaScript libraries? Shows for each of the 49 JavaScript libraries, for which we have at least 100 measurements, the average Time to First Byte (TTFB) and Largest Contentful Paint (LCP) measurements, obtained from Google's Chrome User Experience Report (CrUX).
• Underscore Reports
  • Historical Trend Report
    How did the popularity of Underscore change from month to month? Shows tables and diagrams of monthly trends of usage and market shares for Underscore since October 2017.
  • Version Usage Report
    Which are the most popular versions of Underscore? Shows the distribution of Underscore versions.
  • Cummulative Version Distribution Report
    Which percentage of sites use a newer version of Underscore than some specific version? Shows the cummulative distribution of Underscore versions.
  • Historical Version Trend Report
    How did the distribution of various versions of Underscore change over time? Shows tables and diagrams of monthly trends in the usage of Underscore versions.
  • Trend Analysis Report
    Which market segments contributed most to usage changes? Shows which geographical regions, identified by top level domain and content language, saw popularity gains or declines in the popularity of Underscore in the last 12 months.
  • Page Speed Trends
    How did the average page speed of Underscore sites change over time? Shows the monthly trend of average Time to First Byte (TTFB) and Largest Contentful Paint (LCP) measurements of websites that use Underscore since January 2023.
  • Usage Pattern Report
    On which part of websites is Underscore being used? Shows the percentages of websites that use Underscore on the home page, on inner pages only, or on subdomains only.
  • Change Report
    Which percentage of sites switched from another JavaScript library to Underscore and vice versa? Shows the percentages of websites that recently changed between Underscore and other JavaScript libraries. It also shows examples of sites that made a change.
  • Ranking Breakdown Report
    Is the popularity of Underscore higher among high traffic sites? Shows usage and market shares of Underscore broken down by popularity ranges of the Alexa ranking, that is among the top 1 million sites, the top 100,000, the top 10,000 and the top 1,000 sites. Also shows the popularity rank of Underscore among all JavaScript libraries in these ranges and the most popular competing technology.
  • Market Position Report
    Where in the market diagram lies Underscore? Shows the market position of Underscore in terms of popularity and usage by high traffic sites, compared to the most popular JavaScript libraries.
  • Multiple JavaScript Libraries Usage Report
    How frequently are other JavaScript libraries used together with Underscore, and which ones? Shows statistics on the usage of Underscore together with other JavaScript libraries (if any). We identify here usage on the same site, not necessarily on the same page.

  • Cross-Technologies Breakdown and Segmentation Reports
    In which markets is Underscore particularly strong and which one is the most popular competing technology in each market? A set of reports evaluating the combined usage of two categories of web technologies. This shows, for example, the usage and market shares of Underscore on any top level domain compared to its usage on all websites and the most popular competing technology on each top level domain. Also shows the rank of Underscore among all JavaScript libraries for each top level domain, compared to its overall rank. Furthermore, this includes the ranking and percentages of all top level domains among all the sites that use Underscore.

    These detailed reports are available not only for top level domains, but also for the usage of Underscore broken down by

    • Content Management Systems
    • Server-side Programming Languages
    • Client-side Programming Languages
    • CSS Frameworks
    • Web Servers
    • Web Panels
    • Operating Systems
    • Web Hosting Providers
    • Data Center Providers
    • Reverse Proxy Services
    • DNS Server Providers
    • Email Server Providers
    • SSL Certificate Authorities
    • JavaScript Content Delivery Networks
    • Traffic Analysis Tools
    • Advertising Networks
    • Tag Managers
    • Social Widgets
    • Site Elements
    • Structured Data Formats
    • Markup Languages
    • Character Encodings
    • Image File Formats
    • Top Level Domains
    • Server Locations
    • Content Languages
  • Geographical Distribution Report
    How popular is Underscore in each country? Shows a colored world map indicating the usage percentage of Underscore by country.
  • List of the 300 most popular sites using Underscore including their usage of other JavaScript libraries (if any).
  • List of up to 300 popular sites that started using Underscore in the last month (if there are that many sites in a month), including the JavaScript libraries they were using before (if any).
  • List of up to 300 popular sites that discontinued using Underscore in the last month (if there are that many sites in a month), including the JavaScript libraries they are using now (if any).

Please see technologies overview for explanations on the methodologies used in the surveys, and read our disclaimer to learn about possible incompleteness and inaccuracy of our data.

This is a preview of the current report's table of content.

Purchasing this report entitles you to use the information within your organization and in direct non-public communication with your business partners. The data may not be published or sold to third parties.

If you want to order this report, please proceed to the order form.

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