Technology history for optimizely.com
Stack size over time
From 10 detected technologies in Jun 2018 to 143 in Jun 2026 (peak 145).
Currently detected
- jQuery since Jun 2018
- Varnish since Jun 2018
- Optimizely since Jun 2018
- Google Maps since Jun 2018
- Contentful since Jun 2018
- Lodash since Jun 2018
- Quantcast Measure since Jul 2018
- Google Tag Manager since Jul 2018
- Marketo since Jul 2018
- Google Analytics since Jul 2018
- Crazy Egg since Jul 2018
- Facebook since Jul 2018
- Twitter since Jul 2018
- Webpack since Jul 2018
- jQuery Migrate since Aug 2018
- Amazon CloudFront since Aug 2018
- Amazon S3 since Aug 2018
- Apache HTTP Server since Aug 2018
- Highlight.js since Aug 2018
- Google Font API since Aug 2018
- PHP since Aug 2018
- jQuery UI since Aug 2018
- Nginx since Aug 2018
- Font Awesome since Aug 2018
- New Relic since Aug 2018
- Segment since Aug 2018
- Zepto since Aug 2018
- Amplitude since Jun 2019
- Sentry since Nov 2019
- Babel since Mar 2020
- Cloudflare since Mar 2020
- Chart.js since Mar 2020
- CodeMirror since Mar 2020
- Amazon Web Services since Aug 2020
- OneTrust since Aug 2020
- Bootstrap since Feb 2021
- Microsoft Advertising since Feb 2021
- Linkedin Insight Tag since Feb 2021
- Google Ads Conversion Tracking since Jul 2021
- Facebook Pixel since Jul 2021
- GSAP since Aug 2021
- Prism since Aug 2021
- Stripe since Aug 2021
- Azure since Sep 2021
- Amazon ELB since Sep 2021
- IIS since Sep 2021
- Cloudinary since Sep 2021
- Hotjar since Sep 2021
- Java since Sep 2021
- Google Cloud since Sep 2021
- Optimizely Content Management since Sep 2021
- Popper since Sep 2021
- Python since Sep 2021
- reCAPTCHA since Sep 2021
- LogRocket since Sep 2021
- Django since Sep 2021
- core-js since Sep 2021
- Microsoft ASP.NET since Sep 2021
- RequireJS since Sep 2021
- Windows Server since Sep 2021
- Wheelio since Sep 2021
- ZURB Foundation since Sep 2021
- Handlebars since Oct 2021
- Cloudflare Bot Management since Oct 2021
- React since Oct 2021
- DataTables since Oct 2021
- jsDelivr since Oct 2021
- Moment.js since Oct 2021
- Ruby since Oct 2021
- Ruby on Rails since Oct 2021
- Zendesk since Oct 2021
- cdnjs since Nov 2021
- Envoy since Nov 2021
- Unpkg since Jan 2022
- Cart Functionality since Feb 2022
- jQuery CDN since Feb 2022
- Google Hosted Libraries since Feb 2022
- Lightbox since Mar 2022
- Zoominfo since Mar 2022
- Tailwind CSS since Apr 2022
- Bugcrowd since Aug 2022
- Dropbox since Aug 2022
- DocuSign since Aug 2022
- HSTS since Sep 2022
- Open Graph since Sep 2022
- Salesforce Desk since Oct 2022
- BugSnag since Nov 2022
- Intercom since Nov 2022
- Amazon ALB since Nov 2022
- Hammer.js since Nov 2022
- Azure Monitor since Nov 2022
- Quill since Nov 2022
- LazySizes since Nov 2022
- Frontify since Nov 2022
- Microsoft Application Insights since Nov 2022
- Sqreen since Nov 2022
- 6sense since Dec 2022
- Alpine.js since Jan 2023
- HTTP/3 since Jan 2023
- Apple iCloud Mail since Jan 2023
- Plyr since Jan 2023
- ReadMe since Jan 2023
- Loadable-Components since Apr 2023
- LottieFiles since May 2023
- theTradeDesk since May 2023
- MadCap Software since Jul 2023
- PubSubJS since Sep 2023
- PWA since Sep 2023
- VideoJS since Sep 2023
- Glide.js since Sep 2023
- Lozad.js since Sep 2023
- Snowplow Analytics since Sep 2023
- Stimulus since Sep 2023
- OpenResty since Nov 2023
- Emotion since Nov 2023
- MobX since Nov 2023
- lit-html since Nov 2023
- lit-element since Nov 2023
- Render since Nov 2023
- Turbolinks since Nov 2023
- Typekit since Dec 2023
- FullStory since Dec 2023
- Mixpanel since May 2024
- Okta since Jul 2024
- Reddit Ads since Sep 2024
- YouTube since Oct 2024
- Quora Pixel since Nov 2024
- Ionicons since Dec 2024
- Userflow since Dec 2024
- Datadog since Mar 2025
- Swagger UI since Mar 2025
- Microsoft Clarity since Jul 2025
- KaTeX since Jul 2025
- Tippy.js since Jul 2025
- Google Cloud CDN since Aug 2025
- Proton Mail since Oct 2025
- MathJax since Oct 2025
- Forethought Solve since Dec 2025
- Atlassian Statuspage since Feb 2026
- Google Code Prettify since Feb 2026
- Pingdom RUM since Feb 2026
- RSS since Feb 2026
- Twitter typeahead.js since Feb 2026
Previously used
- React Router Nov 2025 to Apr 2026 · 5 mo
- Sendgrid Apr 2026 to Apr 2026 · 1 mo
- Slick Oct 2024 to Nov 2025 · 1 yr
- Algolia Mar 2020 to Aug 2025 · 5 yrs
- Google Cloud Trace Aug 2022 to Jul 2025 · 2 yrs
- Contentsquare Feb 2023 to Jun 2025 · 2 yrs
- Drift Jul 2023 to Jun 2025 · 1 yr
- Linkedin Ads Sep 2024 to Apr 2025 · 7 mo
- Three.js May 2023 to Apr 2025 · 1 yr
- Select2 Nov 2023 to Feb 2024 · 3 mo
- Heroku Aug 2020 to Oct 2023 · 3 yrs
- Osano Sep 2021 to Sep 2023 · 2 yrs
- Wistia Aug 2021 to Jul 2023 · 1 yr
- AngularJS Mar 2020 to Mar 2023 · 3 yrs
- jQuery-pjax Mar 2020 to Mar 2023 · 3 yrs
- Marked Mar 2020 to Mar 2023 · 3 yrs
- hCaptcha Jan 2023 to Jan 2023 · 1 mo
- Adobe Audience Manager Aug 2022 to Oct 2022 · 2 mo
- Cloudflare Network Error Logging Feb 2022 to Oct 2022 · 8 mo
- Knockout.js Mar 2022 to Sep 2022 · 6 mo
- Google App Engine Aug 2022 to Aug 2022 · 1 mo
- Cloudflare Browser Insights Jun 2021 to Jul 2021 · 1 mo
- Cowboy Jun 2018 to Jul 2021 · 3 yrs
- Duda Jul 2021 to Jul 2021 · 1 mo
- Google Remarketing Tag Jul 2021 to Jul 2021 · 1 mo
- MySQL Aug 2018 to Jul 2021 · 2 yrs
- MyWebsite Jul 2021 to Jul 2021 · 1 mo
- WordPress Aug 2018 to Jul 2021 · 2 yrs
- WP Engine May 2019 to Jul 2021 · 2 yrs
- FancyBox Aug 2018 to Jun 2021 · 2 yrs
- Google Plus Aug 2018 to Jun 2021 · 2 yrs
- Google Sign-in Feb 2021 to Jun 2021 · 4 mo
- Gravatar Aug 2018 to Apr 2021 · 2 yrs
- Twitter Emoji (Twemoji) Aug 2018 to Jan 2021 · 2 yrs
- AdRoll Mar 2020 to Aug 2020 · 5 mo
- Quantcast Choice Aug 2020 to Aug 2020 · 1 mo
- Erlang Jun 2018 to Jun 2020 · 2 yrs
- All in One SEO Pack Aug 2018 to Mar 2020 · 1 yr
- Lithium Aug 2018 to Nov 2019 · 1 yr
- Animate.css Sep 2018 to Jun 2019 · 9 mo
- Underscore.js Jun 2018 to Jun 2018 · 1 mo
- webpack-2 Jun 2018 to Jun 2018 · 1 mo
Timeline
2026 1 added · 3 dropped
- dropped React Router Jun 2026 · JavaScript frameworks
- dropped Sendgrid Jun 2026 · Email
- added Sendgrid Apr 2026 · Email
- dropped Slick Jan 2026 · JavaScript libraries
2025 12 added · 8 dropped · 1 switched
- added Forethought Solve Dec 2025 · Widgets
- added React Router Nov 2025 · JavaScript frameworks
- dropped Algolia Oct 2025 · Search engines
- added MathJax Oct 2025 · JavaScript graphics
- added Proton Mail Oct 2025 · Webmail
- dropped Google Cloud Trace Sep 2025 · Performance
- dropped Contentsquare Aug 2025 · Analytics
- dropped Drift Aug 2025 · Live chat
- added Google Cloud CDN Aug 2025 · CDN
- switched Three.js KaTeX Jul 2025 · JavaScript graphics
- added Microsoft Clarity Jul 2025 · Analytics
- dropped Linkedin Ads Jun 2025 · Advertising
- added Contentsquare May 2025 · Analytics
- added Drift May 2025 · Live chat
- added LottieFiles May 2025 · Miscellaneous
- dropped Contentsquare Apr 2025 · Analytics
- dropped Drift Apr 2025 · Live chat
- dropped Cart Functionality Mar 2025 · Ecommerce
- added Datadog Mar 2025 · RUM
- added Swagger UI Mar 2025 · Documentation
- added Cart Functionality Jan 2025 · Ecommerce
2024 8 added · 5 dropped
- added Userflow Dec 2024 · User onboarding
- added Quora Pixel Nov 2024 · Analytics
- added Slick Oct 2024 · JavaScript libraries
- added Unpkg Oct 2024 · CDN
- added YouTube Oct 2024 · Video players
- added Amazon ELB Jun 2024 · Load balancers
- dropped Amazon ELB May 2024 · Load balancers
- added Mixpanel May 2024 · Analytics
- dropped Osano Apr 2024 · Cookie compliance
- dropped Select2 Apr 2024 · JavaScript libraries
- added Tailwind CSS Apr 2024 · UI frameworks
- dropped LottieFiles Mar 2024 · Miscellaneous
- dropped Unpkg Jan 2024 · CDN
2023 16 added · 5 dropped · 2 switched
- added lit-element Nov 2023 · JavaScript libraries
- added lit-html Nov 2023 · JavaScript libraries
- switched Heroku Render Nov 2023 · PaaS
- dropped Wistia Sep 2023 · Video players
- added Drift Jul 2023 · Live chat
- dropped AngularJS May 2023 · JavaScript frameworks
- added Facebook Pixel May 2023 · Analytics
- dropped jQuery-pjax May 2023 · Mobile frameworks
- added LottieFiles May 2023 · Miscellaneous
- added theTradeDesk May 2023 · Advertising
- added Three.js May 2023 · JavaScript graphics
- dropped Facebook Pixel Apr 2023 · Analytics
- switched Marked Loadable-Components Apr 2023 · JavaScript libraries
- added Unpkg Apr 2023 · CDN
- dropped hCaptcha Mar 2023 · Security
- added Contentsquare Feb 2023 · A/B Testing
- added Alpine.js Jan 2023 · JavaScript frameworks
- added Amazon ELB Jan 2023 · Load balancers
- added Apple iCloud Mail Jan 2023 · Webmail
- added hCaptcha Jan 2023 · Security
- added HTTP/3 Jan 2023 · Miscellaneous
- added Plyr Jan 2023 · Video players
- added ReadMe Jan 2023 · Documentation
2022 39 added · 10 dropped
- added 6sense Dec 2022 · Marketing automation
- dropped Adobe Audience Manager Dec 2022 · Segmentation
- dropped Cloudflare Network Error Logging Dec 2022 · Issue trackers
- dropped Google App Engine Dec 2022 · Web servers
- dropped Knockout.js Dec 2022 · JavaScript frameworks
- dropped Cart Functionality Sep 2022 · Ecommerce
- added HSTS Sep 2022 · Security
- added Open Graph Sep 2022 · Miscellaneous
- added Adobe Audience Manager Aug 2022 · Segmentation
- added Algolia Aug 2022 · Search engines
- added AngularJS Aug 2022 · JavaScript frameworks
- added Apache HTTP Server Aug 2022 · Web servers
- added Bugcrowd Aug 2022 · Security
- added Cloudflare Network Error Logging Aug 2022 · Issue trackers
- added DataTables Aug 2022 · JavaScript libraries
- added DocuSign Aug 2022 · Miscellaneous
- added Dropbox Aug 2022 · Digital asset management
- added Facebook Pixel Aug 2022 · Analytics
- added Google Hosted Libraries Aug 2022 · CDN
- added Heroku Aug 2022 · PaaS
- added Java Aug 2022 · Programming languages
- added jQuery CDN Aug 2022 · CDN
- added jQuery Migrate Aug 2022 · JavaScript libraries
- added jQuery-pjax Aug 2022 · Mobile frameworks
- added Knockout.js Aug 2022 · JavaScript frameworks
- added Lightbox Aug 2022 · JavaScript libraries
- added Marked Aug 2022 · JavaScript libraries
- added Osano Aug 2022 · Cookie compliance
- added Popper Aug 2022 · Miscellaneous
- added reCAPTCHA Aug 2022 · Security
- added RequireJS Aug 2022 · JavaScript frameworks
- added Sentry Aug 2022 · Issue trackers
- added Wistia Aug 2022 · Video players
- added Zoominfo Aug 2022 · Analytics
- added ZURB Foundation Aug 2022 · UI frameworks
- added reCAPTCHA Jul 2022 · Security
- dropped Tailwind CSS Jun 2022 · UI frameworks
- added Sentry Apr 2022 · Issue trackers
- added Tailwind CSS Apr 2022 · UI frameworks
- dropped Unpkg Apr 2022 · CDN
- added Zoominfo Mar 2022 · Analytics
- added Cart Functionality Feb 2022 · Ecommerce
- added Cloudflare Network Error Logging Feb 2022 · Issue trackers
- dropped Cowboy Feb 2022 · Web Servers
- dropped Erlang Feb 2022 · Programming Languages
- added Google Hosted Libraries Feb 2022 · CDN
- added jQuery CDN Feb 2022 · CDN
- dropped Java Jan 2022 · Programming languages
- added Unpkg Jan 2022 · CDN
2021 31 added · 23 dropped · 2 switched
- dropped Amazon ELB Dec 2021 · Load balancers
- dropped Amazon Web Services Dec 2021 · PaaS
- dropped reCAPTCHA Dec 2021 · Security
- added cdnjs Nov 2021 · CDN
- added Envoy Nov 2021 · Reverse proxies
- added DataTables Oct 2021 · JavaScript libraries
- added Amazon ELB Sep 2021 · Load balancers
- added Amazon Web Services Sep 2021 · PaaS
- added Azure Sep 2021 · PaaS
- dropped Cloudflare Browser Insights Sep 2021 · RUM
- added core-js Sep 2021 · JavaScript libraries
- dropped Duda Sep 2021 · CMS
- dropped Google Remarketing Tag Sep 2021 · Retargeting
- added Hotjar Sep 2021 · Analytics
- added IIS Sep 2021 · Web servers
- added Java Sep 2021 · Programming languages
- added Microsoft ASP.NET Sep 2021 · Web frameworks
- dropped MySQL Sep 2021 · Databases
- dropped MyWebsite Sep 2021 · CMS
- added Optimizely Content Management Sep 2021 · CMS
- dropped PHP Sep 2021 · Programming languages
- dropped Sentry Sep 2021 · Issue trackers
- switched Google Plus Wheelio Sep 2021 · Widgets
- added Windows Server Sep 2021 · Operating systems
- dropped WordPress Sep 2021 · Blogs
- dropped WP Engine Sep 2021 · PaaS
- dropped FancyBox Aug 2021 · JavaScript libraries
- dropped Google Sign-in Aug 2021 · Social logins
- added GSAP Aug 2021 · JavaScript frameworks
- dropped jQuery Migrate Aug 2021 · JavaScript libraries
- switched Gravatar Prism Aug 2021 · Miscellaneous
- added Stripe Aug 2021 · Payment processors
- added Wistia Aug 2021 · Video players
- added Algolia Jul 2021 · Search engines
- added Duda Jul 2021 · CMS
- added Facebook Pixel Jul 2021 · Analytics
- added Google Ads Conversion Tracking Jul 2021 · Analytics
- added Google Remarketing Tag Jul 2021 · Retargeting
- added jQuery-pjax Jul 2021 · Mobile frameworks
- added Marked Jul 2021 · JavaScript libraries
- added MyWebsite Jul 2021 · CMS
- added Sentry Jul 2021 · Issue trackers
- dropped Amazon Web Services Jun 2021 · PaaS
- added Cloudflare Browser Insights Jun 2021 · Analytics
- dropped Algolia Mar 2021 · Search engines
- dropped jQuery-pjax Mar 2021 · Mobile frameworks
- dropped Marked Mar 2021 · JavaScript libraries
- dropped Sentry Mar 2021 · Issue trackers
- dropped Twitter Emoji (Twemoji) Mar 2021 · Miscellaneous
- added Bootstrap Feb 2021 · UI frameworks
- dropped Chart.js Feb 2021 · JavaScript graphics
- added Google Sign-in Feb 2021 · Social logins
- added Linkedin Insight Tag Feb 2021 · Analytics
- added Microsoft Advertising Feb 2021 · Analytics
- dropped CodeMirror Jan 2021 · Miscellaneous
- added jQuery Migrate Jan 2021 · JavaScript libraries
2020 6 added · 7 dropped · 1 switched
- dropped jQuery Migrate Nov 2020 · JavaScript libraries
- dropped AdRoll Oct 2020 · Advertising
- added Amazon Web Services Aug 2020 · PaaS
- added Heroku Aug 2020 · PaaS
- switched Quantcast Choice OneTrust Aug 2020 · Cookie compliance
- added Quantcast Choice Aug 2020 · Cookie compliance
- dropped Babel Jul 2020 · Miscellaneous
- dropped All in One SEO Pack May 2020 · SEO
- dropped Amplitude May 2020 · Analytics
- added AdRoll Mar 2020 · Advertising Networks
- added Babel Mar 2020 · Miscellaneous
- added WP Engine Mar 2020 · PaaS
- dropped Apache HTTP Server Jan 2020 · Web Servers
- dropped Lithium Jan 2020 · CMS
2019 17 added · 2 dropped
- added Sentry Nov 2019 · Issue Trackers
- dropped WP Engine Oct 2019 · PaaS
- dropped Animate.css Aug 2019 · Web Frameworks
- added Amplitude Jun 2019 · Analytics
- added WP Engine May 2019 · PaaS
- added All in One SEO Pack Mar 2019 · SEO
- added Animate.css Mar 2019 · Web Frameworks
- added Apache HTTP Server Mar 2019 · Web Servers
- added FancyBox Mar 2019 · JavaScript Libraries
- added Google Plus Mar 2019 · Widgets
- added Gravatar Mar 2019 · Miscellaneous
- added jQuery Migrate Mar 2019 · JavaScript Libraries
- added jQuery UI Mar 2019 · JavaScript Libraries
- added Lithium Mar 2019 · CMS
- added MySQL Mar 2019 · Databases
- added Nginx Mar 2019 · Web Servers
- added PHP Mar 2019 · Programming Languages
- added Twitter Emoji (Twemoji) Mar 2019 · Miscellaneous
- added WordPress Mar 2019 · CMS
2018 11 added · 2 dropped · 1 switched
- added Google Maps Dec 2018 · Maps
- dropped Google Maps Nov 2018 · Maps
- added Animate.css Sep 2018 · Web Frameworks
- added New Relic Aug 2018 · Analytics
- added Segment Aug 2018 · Analytics
- dropped Underscore.js Aug 2018 · JavaScript Frameworks
- added Crazy Egg Jul 2018 · Analytics
- added Facebook Jul 2018 · Widgets
- added Google Analytics Jul 2018 · Analytics
- added Google Tag Manager Jul 2018 · Tag Managers
- added Marketo Jul 2018 · Marketing Automation
- added Quantcast Measure Jul 2018 · Analytics
- added Twitter Jul 2018 · Widgets
- switched webpack-2 Webpack Jul 2018 · Miscellaneous