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Domain answer

railstutorial.jp

30

live countable technologies on this host, of 39 live detections. Last looked 13 Aug 2026.

fresh13 Aug 2026|first crawled 4 May 2020|HTTP 200|root domain

YassLab Inc. is a Japanese software company engaged in the development and operation of Ruby on Rails tutorials and guides, as well as the provision of educational content and training programs for web service development. The company also offers internalization support for employee training, content support for educational institutions and schools, and subscription-based development support. YassLab serves individual learners, corporate clients, and educational institutions, and collaborates with organizations and partners to support open-source educational resources and community events.

What railstutorial.jp runs

Technologies with their datesof 39 live detections on this hostverified 13 Aug 2026

Technology
Category
First verified
Last verified
Seen
Version
2025-03-23
2026-08-13
x7
none seen
2020-05-04
2026-08-13
x8
4.6.2
2025-03-23
2026-08-13
x7
none seen
2025-03-23
2026-08-13
x7
none seen
2020-05-04
2026-08-13
x8
none seen
2025-03-23
2026-08-13
x7
none seen
2025-03-23
2026-08-13
x7
none seen
2020-05-04
2026-08-13
x8
5.5.0
2020-05-04
2026-08-13
x8
none seen
2025-10-17
2026-08-13
x6
none seen
2025-03-23
2026-08-13
x7
none seen
2020-05-04
2026-08-13
x8
none seen
2025-03-23
2026-08-13
x7
none seen
2025-03-23
2026-08-13
x7
none seen
2020-05-04
2026-08-13
x8
2.7.1
2026-08-13
2026-08-13
x1
none seen
2026-08-13
2026-08-13
x1
none seen
2025-03-23
2026-08-13
x7
none seen
Boost.ai2026-08-13Live Chat and Messagingx7
Bootstrap2026-08-13UI Frameworks and Componentsx8
Chart.js2026-08-13JavaScript Librariesx7
Cloudflare2026-08-13Content Delivery and Edgex7
DoubleClick Floodlight2026-08-13Retargeting and Attributionx6
Facebook2026-08-13Social and Contentx8
Facebook Comments2026-08-13Blogs and Publishingx7
Facebook Login2026-08-13Authentication and Identityx7
Facebook Login Button2026-08-13Authentication and Identityx7
Font Awesome2026-08-13Media and Assetsx8
Google Analytics2026-08-13Web Analyticsx8
Google Campaign Manager 3602026-08-13Advertisingx6
Google Sign-In2026-08-13Authentication and Identityx7
Google Tag Manager2026-08-13Tag Managementx8
Google Universal Analytics2026-08-13Web Analyticsx7
LazySizes2026-08-13JavaScript Librariesx7
MathJax2026-08-13JavaScript Librariesx8
MySQL2026-08-13Databases and Data Engineeringx1
PHP2026-08-13Programming Languages and Runtimesx1
Popper2026-08-13JavaScript Librariesx7

20 of 30 live countable"Seen" is the number of snapshots the detection was verified in

10 more live countable technologies on this host, with their dates
Technology
Category
First verified
Last verified
Seen
Version
2020-05-04
2026-08-13
x8
none seen
2020-05-04
2026-08-13
x8
none seen
2025-03-23
2026-08-13
x7
none seen
2025-03-23
2026-08-13
x7
none seen
2026-08-13
2026-08-13
x1
none seen
2020-05-04
2026-08-13
x8
none seen
2025-03-23
2026-08-13
x7
none seen
2025-03-23
2026-08-13
x7
none seen
2020-05-04
2026-08-13
x8
3.7.0
2025-03-23
2026-08-13
x7
none seen
9 web standards present on this host, not counted

CSS, HSTS, HTML, HTML5, JavaScript, Open Graph, PWA, Ruby, WebP

9 technologies seen on earlier snapshots and missing from the latest one, kept with their last verified date
Technology
Category
First verified
Last verified
Web Servers
2020-05-04
2025-03-23
Programming Languages and Runtimes
2020-05-04
2025-03-23
Web Analytics
2020-05-04
2020-05-04
Social and Content
2020-05-04
2020-05-04
Hosting and Cloud Providers
2025-03-23
2025-03-23
Observability
2020-05-04
2020-05-04
Payments
2020-05-04
2020-05-04
Lead Capture and Forms
2020-05-04
2020-05-04
2020-05-04
2020-05-04

Resolved company

2 domains

YassLab

Legal nameYassLab Inc.
CategoryComputer Training Schools
Industrymostly 611420 in 61 Educational Services (50.0%)
Also611430 in 61 Educational Services (30.0%)
HQ13, Japan
Founded2012
Employees1 to 10
Veridion IDMZ6VBWEIC44KG6O7

Other domains YassLab owns

1 of 1 other domainseach one is its own answer, counted on its own hosts

What YassLab is classified as

611420 in Educational Services500
611430 in Educational Services300
541511 in Professional, Scientific, and Technical Services200

Share of the entity's activity3 codes, heaviest first, per milleverified 13 Aug 2026

The 3 codes in this chart
CodeShareScore
61142050.0%1.00
61143030.0%1.00
54151120.0%1.00

Open as a segment

Companies running cdnjs, jQuery, jQuery Easing, the 3 least common technologies on this host. Counting is free; change the set on the segment page.

/companies/tech-cdnjs/tech-jquery/tech-jquery-easing

Count them, free