Technology history for simonwillison.net
Stack size over time
From 4 detected technologies in Jan 2019 to 21 in Jun 2026 (peak 24).
Currently detected
- Cloudflare since Jan 2019
- Plausible since Dec 2021
- Google Workspace since Aug 2022
- HTTP/3 since Sep 2022
- HSTS since Sep 2022
- RSS since Dec 2022
- PWA since Jan 2023
- React since Jan 2023
- Ruby since Jan 2023
- Ruby on Rails since Jan 2023
- core-js since Jan 2023
- Mastodon since Jan 2023
- Open Graph since Jan 2023
- cdnjs since Apr 2024
- Jekyll since Apr 2024
- Fastly since Apr 2024
- GitHub Pages since Apr 2024
- Varnish since Apr 2024
- Fly.io since Aug 2024
- Google Font API since Aug 2025
- Cloudflare Browser Insights since Nov 2025
Previously used
- Hugo Nov 2024 to Sep 2025 · 10 mo
- lite-youtube-embed Jan 2025 to Jul 2025 · 6 mo
- YouTube Jan 2019 to Jul 2025 · 6 yrs
- Heroku Aug 2020 to Jun 2025 · 4 yrs
- Webpack Jan 2023 to Jun 2025 · 2 yrs
- Google Analytics Jan 2019 to Oct 2024 · 5 yrs
- Vercel Sep 2020 to Jul 2024 · 3 yrs
- Twitter Dec 2019 to Mar 2023 · 3 yrs
- Twitter Ads Jul 2021 to Mar 2023 · 1 yr
- Cloudflare Network Error Logging Feb 2022 to Oct 2022 · 8 mo
- Google Tag Manager Jan 2019 to Sep 2022 · 3 yrs
- Cart Functionality Feb 2022 to Jul 2022 · 5 mo
- Google Remarketing Tag Jul 2021 to May 2022 · 10 mo
- SoundCloud Apr 2022 to Apr 2022 · 1 mo
- Wheelio Sep 2021 to Oct 2021 · 1 mo
- Amazon Web Services Aug 2020 to Apr 2021 · 8 mo
Timeline
2025 5 added · 9 dropped
- dropped cdnjs Dec 2025 · CDN
- dropped Jekyll Dec 2025 · Static site generator
- added Cloudflare Browser Insights Nov 2025 · Analytics
- dropped Hugo Nov 2025 · Static site generator
- dropped lite-youtube-embed Sep 2025 · JavaScript libraries
- dropped YouTube Sep 2025 · Video players
- dropped Heroku Aug 2025 · PaaS
- dropped Webpack Aug 2025 · Miscellaneous
- added lite-youtube-embed Jul 2025 · JavaScript libraries
- added YouTube Jul 2025 · Video players
- dropped lite-youtube-embed Mar 2025 · JavaScript libraries
- dropped YouTube Mar 2025 · Video players
- added lite-youtube-embed Jan 2025 · JavaScript libraries
- added YouTube Jan 2025 · Video players
2024 1 added · 2 dropped · 1 switched
- dropped Google Analytics Dec 2024 · Analytics
- added Hugo Nov 2024 · Static site generator
- switched Vercel Fly.io Aug 2024 · PaaS
- dropped YouTube Jul 2024 · Video players
2023 4 added · 4 dropped
- added YouTube Aug 2023 · Video players
- dropped YouTube Jul 2023 · Video players
- dropped Twitter May 2023 · Widgets
- dropped Twitter Ads May 2023 · Advertising
- added Twitter Mar 2023 · Widgets
- added Twitter Ads Mar 2023 · Advertising
- added YouTube Mar 2023 · Video players
- dropped YouTube Feb 2023 · Video players
2022 8 added · 8 dropped · 1 switched
- dropped Cloudflare Network Error Logging Dec 2022 · Issue trackers
- dropped Google Tag Manager Dec 2022 · Tag managers
- added RSS Dec 2022 · Miscellaneous
- dropped Twitter Dec 2022 · Widgets
- dropped Twitter Ads Dec 2022 · Advertising
- dropped Cart Functionality Oct 2022 · Ecommerce
- added HSTS Sep 2022 · Security
- added HTTP/3 Sep 2022 · Miscellaneous
- switched SoundCloud Twitter Sep 2022 · Widgets
- added Twitter Ads Sep 2022 · Advertising
- added Google Workspace Aug 2022 · Webmail
- dropped Google Remarketing Tag Jul 2022 · Retargeting
- added SoundCloud Apr 2022 · Widgets
- added Cart Functionality Feb 2022 · Ecommerce
- added Cloudflare Network Error Logging Feb 2022 · Issue trackers
- dropped Wheelio Jan 2022 · Widgets
- dropped YouTube Jan 2022 · Video players
2021 7 added · 5 dropped
- added Plausible Dec 2021 · Analytics
- dropped Twitter Dec 2021 · Widgets
- dropped Twitter Ads Dec 2021 · Advertising
- added Twitter Oct 2021 · Widgets
- added Twitter Ads Oct 2021 · Advertising
- dropped Twitter Sep 2021 · Widgets
- dropped Twitter Ads Sep 2021 · Advertising
- added Wheelio Sep 2021 · Widgets
- added Google Remarketing Tag Jul 2021 · Retargeting
- added Twitter Ads Jul 2021 · Advertising
- dropped Amazon Web Services Jun 2021 · PaaS
- added Twitter Mar 2021 · Widgets
2020 4 added · 2 dropped
- added YouTube Dec 2020 · Video players
- dropped YouTube Oct 2020 · Video players
- added Amazon Web Services Aug 2020 · PaaS
- added Heroku Aug 2020 · PaaS
- added YouTube Jul 2020 · Video players
- dropped Twitter Apr 2020 · Widgets
2019 5 added · 1 dropped
- added Twitter Dec 2019 · Widgets
- dropped YouTube May 2019 · Video Players
- added Cloudflare Mar 2019 · CDN
- added Google Analytics Mar 2019 · Analytics
- added Google Tag Manager Mar 2019 · Tag Managers
- added YouTube Mar 2019 · Video Players