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Site Info - Character.ai

Overview of web technologies used by Character.ai.

Website Background

character.ai | Personalized AI for every moment of your day
Chat with millions of AI Characters anytime, anywhere. Super-intelligent chat bots that hear you, understand you, and remember you. Free to use with no ads.

Description on Homepage

Top 1k among all websites

Popularity rank

Ghost is an open source blogging platform built on Node.js, originally developed by John O'Nolan.

Ghost 5.117
version 5.110 used until recently
24% of sites use a newer version
used on a subdomain

Zendesk provides hosted customer service software.

Zendesk
used on a subdomain

JavaScript is a lightweight, object-oriented, cross-platform scripting language.

JavaScript

Ruby is a general-purpose object-oriented language originally developed by Yukihiro "Matz" Matsumoto in Japan.

Ruby
used on a subdomain

JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.

JavaScript

Next.js is an open source JavaScript framework based on React and Node.js.

Next.js

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

jQuery 3.5.1
version 3.6.3 used until recently
62% of sites use a newer version
used on a subdomain

Cloudflare Server is a web server developed by Cloudflare.

Cloudflare Server

Node.js is a server-side JavaScript environment for writing network programs such as web servers, originally developed by Ryan Dahl.

Node.js

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

Nginx
used on a subdomain

Zendesk provides hosted customer service software.

Zendesk
used on a subdomain
hosting info partly based on data from ipinfo.io

Cloudflare provides a content delivery network.

Cloudflare

Fastly is a content delivery network.

Fastly
used on a subdomain

Cloudflare provides DNS servers and other web services.

Cloudflare

Gmail is the email service provided by Google.

Gmail

Zendesk provides hosted customer service software.

Zendesk
used on a subdomain

GlobalSign is an IT security service provider, also operating as SSL certificate authority.

GlobalSign

Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.

Let’s Encrypt
used on a subdomain

Sectigo (formerly Comodo CA) is a US-based SSL certificate authority.

Sectigo
used on a subdomain

The CDNJS is a content distribution network, hosting a large number of JavaScript libraries, provided by CloudFlare.

CDNJS
used on a subdomain

jsDelivr is a service for hosting JavaScript files.

jsDelivr
used on a subdomain

The jQuery CDN hosts copies of the jQuery library, provided by MaxCDN.

jQuery CDN
used on a subdomain

External Cascading Style Sheets define style rules in a separate CSS file.

External CSS

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Embedded CSS

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Inline CSS
used on a subdomain

Session cookies are temporary cookies, which are deleted when the user closes the browser.

Session Cookies

Persistent cookies with an expiration time of up to 1 day.

Cookies expiring in hours

Persistent cookies with an expiration time of more than 10 years.

Cookies expiring in decades

HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.

HttpOnly Cookies

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Non-HttpOnly Cookies

Secure cookies are used only via an encrypted connections, which may increase security.

Secure Cookies

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Non-Secure Cookies

Brotli is a lossless compression algorithm developed by Google.

Brotli Compression

Gzip (GNU zip) is a file compression algorithm.

Gzip Compression
used on a subdomain

A weak ETag is an HTTP header field for validation of cached web pages, that indicates a semantically equivalent page in the cache.

Weak ETag
used on a subdomain

The Internet Protocol version 6 (IPv6) provides amongst others a vastly larger address space than the preceding version 4. We consider a website to support IPv6 if a 128-bit address is assigned to it, regardless of the content delivered at that address.

IPv6

HTTP/2 is the second major version of the HTTP network protocol.

HTTP/2

HTTP/3 is the third major version of the HTTP network protocol, derived from the QUIC protocol.

HTTP/3

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

HTTP Strict Transport Security
used on a subdomain

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

Default protocol https

The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph.

Open Graph

Twitter/X Cards enable automatic attachment of photos, videos and media elements to tweets.

Twitter/X Cards
used on a subdomain

JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding Linked Data using JSON.

JSON-LD
used on a subdomain

Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization.

Generic RDFa
used on a subdomain

HTML5 is the fifth revision of the HTML standard.

HTML5

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

UTF-8

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

PNG
used on a subdomain

Scalable Vector Graphics (SVG) is an XML-based vector image format.

SVG
used on a subdomain

WebP is an image format that provides lossless and lossy compression, developed by Google.

WebP
used until recently

Anguilla, also used for AI related sites

.ai

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