Technology history for freecodecamp.org
Stack size over time
From 4 detected technologies in Apr 2018 to 76 in Jun 2026 (peak 79).
Currently detected
- Font Awesome since Apr 2018
- Cloudflare since Apr 2018
- Google Analytics since Jun 2018
- Bootstrap since Jun 2018
- jQuery since Jun 2018
- Google Font API since Jan 2019
- Google Tag Manager since Jan 2019
- React since Jan 2019
- Stripe since Jan 2019
- Gatsby since Jan 2019
- Nginx since Jan 2019
- Netlify since Jan 2019
- Node.js since Jan 2019
- Webpack since Jan 2019
- Facebook since May 2019
- Apache HTTP Server since May 2019
- Varnish since May 2019
- Gravatar since Jun 2019
- Express since Jun 2019
- Ghost since Jun 2019
- Prism since Jun 2019
- Algolia Realtime Search since Aug 2019
- CentOS since Aug 2019
- Algolia since Jun 2020
- Handlebars since Sep 2020
- Ruby on Rails since Sep 2020
- Ruby since Sep 2020
- Discourse since Sep 2020
- Fastly since Sep 2020
- Ember.js since Sep 2020
- GitHub Pages since Sep 2020
- jsDelivr since Sep 2020
- Moment.js since Sep 2020
- Lodash since Oct 2020
- Sentry since Dec 2020
- Cloudflare Browser Insights since Apr 2021
- core-js since Sep 2021
- cdnjs since Nov 2021
- Cloudflare Network Error Logging since Feb 2022
- Tailwind CSS since Apr 2022
- Monaco Editor since Apr 2022
- Google Workspace since Aug 2022
- PWA since Aug 2022
- Amazon Web Services since Aug 2022
- Amazon SES since Aug 2022
- Meteor since Aug 2022
- MongoDB since Aug 2022
- HSTS since Sep 2022
- Open Graph since Sep 2022
- Cart Functionality since Sep 2022
- web-vitals since Mar 2023
- HTTP/3 since Jan 2024
- Svelte since Jun 2024
- Astro since Jun 2024
- SWC since Jul 2024
- Emotion since Jul 2024
- parcel since Jul 2024
- Cloudflare Bot Management since Jul 2024
- Google Publisher Tag since Sep 2024
- Funding Choices since Sep 2024
- React Router since Nov 2024
- Criteo since Nov 2024
- Google Pay since Feb 2025
- Shopify since Feb 2025
- Shop Pay since Feb 2025
- Day.js since Feb 2025
- PayPal since Feb 2025
- Priority Hints since Feb 2025
- Apple Pay since Feb 2025
- American Express since Feb 2025
- Mastercard since Feb 2025
- Venmo since Feb 2025
- Visa since Feb 2025
- Google Hosted Libraries since Apr 2025
- Jekyll since May 2025
- Starlight since Aug 2025
Previously used
- Google AdSense Mar 2025 to Feb 2026 · 11 mo
- 33Across Nov 2024 to Nov 2025 · 1 yr
- Snowplow Analytics Jul 2025 to Aug 2025 · 1 mo
- PostHog Mar 2025 to May 2025 · 2 mo
- Docsify Oct 2023 to May 2024 · 7 mo
- Marked Sep 2020 to May 2024 · 3 yrs
- Unpkg Jul 2021 to May 2024 · 2 yrs
- C Feb 2023 to Feb 2023 · 1 mo
- Google Remarketing Tag Jul 2021 to May 2022 · 10 mo
- jQuery UI Sep 2020 to Feb 2022 · 1 yr
- Highlight.js Oct 2020 to Jan 2022 · 1 yr
- Wheelio Sep 2021 to Oct 2021 · 1 mo
- Lightbox Apr 2018 to Oct 2019 · 1 yr
- MathJax Jan 2019 to Sep 2019 · 8 mo
- reCAPTCHA Apr 2019 to Sep 2019 · 5 mo
- Dynatrace RUM Jan 2019 to May 2019 · 4 mo
- Medium Jan 2019 to May 2019 · 4 mo
- Parse.ly Jan 2019 to May 2019 · 4 mo
- D3 Jun 2018 to Jul 2018 · 1 mo
- Optimizely Apr 2018 to Jul 2018 · 3 mo
Timeline
2026 1 dropped
- dropped Google AdSense Apr 2026 · Advertising
2025 3 added · 2 dropped · 2 switched
- switched 33Across Google AdSense Dec 2025 · Advertising
- dropped Snowplow Analytics Oct 2025 · Analytics
- added Starlight Aug 2025 · Documentation
- switched PostHog Snowplow Analytics Jul 2025 · Analytics
- dropped Google AdSense Jun 2025 · Advertising
- added Google AdSense Mar 2025 · Advertising
- added PostHog Mar 2025 · Analytics
2024 10 added · 6 dropped
- added 33Across Nov 2024 · Advertising
- added Criteo Nov 2024 · Advertising
- added React Router Nov 2024 · JavaScript frameworks
- dropped cdnjs Jul 2024 · CDN
- added Cloudflare Bot Management Jul 2024 · Security
- dropped Docsify Jul 2024 · Documentation
- added Emotion Jul 2024 · JavaScript frameworks
- dropped Fastly Jul 2024 · CDN
- dropped GitHub Pages Jul 2024 · PaaS
- dropped Marked Jul 2024 · JavaScript libraries
- added parcel Jul 2024 · Miscellaneous
- added SWC Jul 2024 · Miscellaneous
- dropped Unpkg Jul 2024 · CDN
- added Astro Jun 2024 · JavaScript frameworks
- added Svelte Jun 2024 · JavaScript frameworks
- added HTTP/3 Jan 2024 · Miscellaneous
2023 4 added · 1 dropped
- added Docsify Oct 2023 · Documentation
- added Tailwind CSS Jul 2023 · UI frameworks
- dropped C Apr 2023 · Programming languages
- added web-vitals Mar 2023 · JavaScript libraries
- added C Feb 2023 · Programming languages
2022 10 added · 6 dropped
- dropped Cart Functionality Dec 2022 · Ecommerce
- added Cart Functionality Sep 2022 · Ecommerce
- added HSTS Sep 2022 · Security
- added Open Graph Sep 2022 · Miscellaneous
- added Amazon SES Aug 2022 · Email
- added Amazon Web Services Aug 2022 · PaaS
- added Google Workspace Aug 2022 · Webmail
- added PWA Aug 2022 · Miscellaneous
- dropped Google Remarketing Tag Jul 2022 · Retargeting
- dropped Handlebars Jun 2022 · JavaScript frameworks
- dropped Tailwind CSS Jun 2022 · UI frameworks
- dropped jQuery UI Apr 2022 · JavaScript libraries
- added Monaco Editor Apr 2022 · Rich text editors
- added Tailwind CSS Apr 2022 · UI frameworks
- dropped Highlight.js Mar 2022 · Miscellaneous
- added Cloudflare Network Error Logging Feb 2022 · Issue trackers
2021 14 added · 9 dropped
- dropped Wheelio Dec 2021 · Widgets
- added cdnjs Nov 2021 · CDN
- added core-js Sep 2021 · JavaScript libraries
- added Wheelio Sep 2021 · Widgets
- added Discourse Jul 2021 · Message boards
- added Ember.js Jul 2021 · JavaScript frameworks
- added Google Remarketing Tag Jul 2021 · Retargeting
- added Handlebars Jul 2021 · JavaScript frameworks
- added Highlight.js Jul 2021 · Miscellaneous
- added jQuery UI Jul 2021 · JavaScript libraries
- added Moment.js Jul 2021 · JavaScript libraries
- added Sentry Jul 2021 · Issue trackers
- added Unpkg Jul 2021 · CDN
- added Lodash Jun 2021 · JavaScript libraries
- added Cloudflare Browser Insights Apr 2021 · Analytics
- dropped Discourse Mar 2021 · Message boards
- dropped Ember.js Mar 2021 · JavaScript frameworks
- dropped Handlebars Mar 2021 · JavaScript frameworks
- dropped Highlight.js Mar 2021 · Miscellaneous
- dropped jQuery UI Mar 2021 · JavaScript libraries
- dropped Lodash Mar 2021 · JavaScript libraries
- dropped Moment.js Mar 2021 · JavaScript libraries
- dropped Sentry Mar 2021 · Issue trackers
2020 4 added
- added Sentry Dec 2020 · Issue trackers
- added Highlight.js Oct 2020 · Miscellaneous
- added Lodash Oct 2020 · JavaScript libraries
- added Algolia Jun 2020 · Search engines
2019 24 added · 7 dropped · 2 switched
- dropped Lightbox Dec 2019 · JavaScript Libraries
- dropped MathJax Nov 2019 · JavaScript Graphics
- dropped reCAPTCHA Nov 2019 · Captchas
- added Algolia Realtime Search Aug 2019 · Search Engines
- added CentOS Aug 2019 · Operating Systems
- dropped Dynatrace RUM Jul 2019 · Analytics
- dropped Nginx Jul 2019 · Reverse Proxy
- dropped Parse.ly Jul 2019 · Analytics
- added Express Jun 2019 · Web Frameworks
- switched Medium Ghost Jun 2019 · Blogs
- added Gravatar Jun 2019 · Miscellaneous
- added Prism Jun 2019 · Miscellaneous
- added reCAPTCHA Apr 2019 · Captchas
- added Bootstrap Mar 2019 · Web Frameworks
- added Cloudflare Mar 2019 · CDN
- added Dynatrace RUM Mar 2019 · Analytics
- added Font Awesome Mar 2019 · Font Scripts
- added Gatsby Mar 2019 · JavaScript Frameworks
- added Google Analytics Mar 2019 · Analytics
- added Google Font API Mar 2019 · Font Scripts
- added Google Tag Manager Mar 2019 · Tag Managers
- added jQuery Mar 2019 · JavaScript Libraries
- added Lightbox Mar 2019 · JavaScript Libraries
- switched D3 MathJax Mar 2019 · JavaScript Graphics
- added Medium Mar 2019 · Blogs
- added Netlify Mar 2019 · CDN
- added Nginx Mar 2019 · Web Servers
- added Node.js Mar 2019 · Programming Languages
- added Parse.ly Mar 2019 · Analytics
- added React Mar 2019 · JavaScript Frameworks
- added Stripe Mar 2019 · Payment Processors
- added Webpack Mar 2019 · Miscellaneous
- dropped Optimizely Feb 2019 · Analytics
2018 4 added
- added Bootstrap Jun 2018 · Web Frameworks
- added D3 Jun 2018 · JavaScript Graphics
- added Google Analytics Jun 2018 · Analytics
- added jQuery Jun 2018 · JavaScript Frameworks