Frameworks

Ruby on RailsRuby on Rails

Ruby on Rails Usage Statistics · Download List of All Websites using Ruby on Rails

Ruby on Rails is an open-source web framework that is optimized for programmer happiness and sustainable productivity.

JavaScript Libraries and Functions

jQueryjQuery

jQuery Usage Statistics · Download List of All Websites using jQuery

JQuery is a fast, concise, JavaScript Library that simplifies how you traverse HTML documents, handle events, perform animations, and add Ajax interactions to your web pages. jQuery is designed to change the way that you write JavaScript.

JavaScript Library

Email Hosting Providers

SPFSPF

SPF Usage Statistics · Download List of All Websites using SPF

The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery.

Web Servers

nginxnginx

nginx Usage Statistics · Download List of All Websites using nginx

nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.

Phusion PassengerPhusion Passenger

Phusion Passenger Usage Statistics · Download List of All Websites using Phusion Passenger

Phusion Passenger - a.k.a. mod_rails or mod_rack - is a web server and application server, designed to be fast, robust and lightweight. Administration tools allow you to gain insight into web application operations and server performance.

Profile Details

Last technology detected on 11th August 2025. We know of 6 technologies on this page and 14 technologies removed from r2backups.com since 29th June 2016. Link to this page.

Add BuiltWith to for free! Get lookups easily and quickly.

Get a notification when r2backups.com adds new technologies.

Get r2backups.com profile as an XML, JSON, CSV or XLSX via the Domain API.

Suggest a Technology

Can't find the technology you are looking for? Send us a suggestion, we will try and add it to our database.