Technology history for calendar.com
Stack size over time
From 5 detected technologies in Aug 2018 to 36 in Jun 2026 (peak 39).
Currently detected
- Google Tag Manager since Aug 2018
- Google Analytics since Aug 2018
- Amazon CloudFront since Aug 2018
- Amazon S3 since Aug 2018
- jQuery since Aug 2018
- Google Font API since Sep 2018
- Google Maps since Sep 2018
- React since Sep 2018
- Stripe since Sep 2018
- Amazon Web Services since Feb 2019
- Cloudflare since Feb 2019
- Webpack since Jun 2019
- Gatsby since Aug 2019
- Google Sign-in since Feb 2021
- Apple Sign-in since Feb 2021
- Font Awesome since Jul 2021
- core-js since Sep 2021
- Google Hosted Libraries since Feb 2022
- Profitwell since Mar 2022
- Tailwind CSS since Apr 2022
- Google Workspace since Aug 2022
- PWA since Aug 2022
- Zendesk since Aug 2022
- HSTS since Sep 2022
- Open Graph since Sep 2022
- Ruby since Jan 2023
- Ruby on Rails since Jan 2023
- Sendinblue since Jan 2023
- Moment.js since Jan 2023
- Cloudflare Bot Management since Jan 2023
- HubSpot since Jan 2023
- Sendgrid since Dec 2023
- lit-element since Jun 2024
- lit-html since Jun 2024
- React Router since Feb 2025
- Envoy since Apr 2025
Previously used
- Microsoft Clarity Jul 2024 to Apr 2025 · 9 mo
- Amplitude Sep 2021 to Jan 2025 · 3 yrs
- Lodash Sep 2018 to Jan 2025 · 6 yrs
- styled-components Sep 2018 to Jan 2025 · 6 yrs
- HTTP/3 Sep 2022 to Oct 2024 · 2 yrs
- Google Optimize Jul 2021 to Aug 2023 · 2 yrs
- Facebook Pixel Jul 2021 to Mar 2023 · 1 yr
- Klaviyo Sep 2021 to Mar 2023 · 1 yr
- Cloudflare Network Error Logging Feb 2022 to Oct 2022 · 8 mo
- Facebook Mar 2019 to Apr 2022 · 3 yrs
- Google Plus Aug 2019 to Oct 2021 · 2 yrs
- Wheelio Sep 2021 to Oct 2021 · 1 mo
- Express May 2019 to Jul 2019 · 2 mo
- Node.js May 2019 to Jul 2019 · 2 mo
- Nginx Sep 2018 to Jan 2019 · 4 mo
- Intercom Nov 2018 to Nov 2018 · 1 mo
Timeline
2025 1 added · 3 dropped · 1 switched
- dropped Microsoft Clarity Jun 2025 · Analytics
- added Envoy Apr 2025 · Reverse proxies
- dropped Amplitude Mar 2025 · Analytics
- dropped Lodash Mar 2025 · JavaScript libraries
- switched styled-components React Router Feb 2025 · JavaScript frameworks
2024 5 added · 2 dropped
- dropped HTTP/3 Dec 2024 · Miscellaneous
- added Cloudflare Bot Management Nov 2024 · Security
- added Microsoft Clarity Jul 2024 · Analytics
- added lit-element Jun 2024 · JavaScript libraries
- added lit-html Jun 2024 · JavaScript libraries
- dropped Cloudflare Bot Management May 2024 · Security
- added Cloudflare Bot Management Mar 2024 · Security
2023 3 added · 3 dropped · 1 switched
- added Sendgrid Dec 2023 · Email
- dropped Cloudflare Bot Management Nov 2023 · Security
- dropped Google Optimize Oct 2023 · A/B Testing
- dropped Klaviyo May 2023 · Marketing automation
- switched Facebook Pixel Amplitude Mar 2023 · Analytics
- added HubSpot Jan 2023 · Marketing automation
- added Sendinblue Jan 2023 · Marketing automation
2022 10 added · 3 dropped
- dropped Cloudflare Network Error Logging Dec 2022 · Issue trackers
- added HSTS Sep 2022 · Security
- added HTTP/3 Sep 2022 · Miscellaneous
- added Open Graph Sep 2022 · Miscellaneous
- added Google Workspace Aug 2022 · Webmail
- added PWA Aug 2022 · Miscellaneous
- added Zendesk Aug 2022 · Issue trackers
- dropped Facebook Jun 2022 · Widgets
- added Tailwind CSS Apr 2022 · UI frameworks
- added Profitwell Mar 2022 · Analytics
- added Cloudflare Network Error Logging Feb 2022 · Issue trackers
- added Google Hosted Libraries Feb 2022 · CDN
- dropped Amplitude Jan 2022 · Analytics
2021 10 added · 1 dropped · 1 switched
- dropped Wheelio Dec 2021 · Widgets
- added Amplitude Sep 2021 · Analytics
- added core-js Sep 2021 · JavaScript libraries
- added Klaviyo Sep 2021 · Marketing automation
- switched Google Plus Wheelio Sep 2021 · Widgets
- added Facebook Pixel Jul 2021 · Analytics
- added Font Awesome Jul 2021 · Font scripts
- added Google Optimize Jul 2021 · A/B Testing
- added Lodash Jul 2021 · JavaScript libraries
- added styled-components Jul 2021 · Development
- added Apple Sign-in Feb 2021 · Social logins
- added Google Sign-in Feb 2021 · Social logins
2020 1 dropped
- dropped Google Plus Feb 2020 · Widgets
2019 16 added · 7 dropped · 2 switched
- dropped Express Sep 2019 · Web Servers
- dropped Google Maps Sep 2019 · Maps
- dropped Lodash Sep 2019 · JavaScript Libraries
- dropped Node.js Sep 2019 · Programming Languages
- dropped Stripe Sep 2019 · Payment Processors
- added Gatsby Aug 2019 · Static Site Generator
- dropped Google Font API Aug 2019 · Font Scripts
- added Google Plus Aug 2019 · Widgets
- added Webpack Jun 2019 · Miscellaneous
- switched Nginx Express May 2019 · Web Servers
- added Node.js May 2019 · Programming Languages
- added Amazon CloudFront Mar 2019 · CDN
- added Amazon Web Services Mar 2019 · PaaS
- added Cloudflare Mar 2019 · CDN
- added Facebook Mar 2019 · Widgets
- switched Intercom Google Analytics Mar 2019 · Analytics
- added Google Font API Mar 2019 · Font Scripts
- added Google Maps Mar 2019 · Maps
- added Google Tag Manager Mar 2019 · Tag Managers
- added Lodash Mar 2019 · JavaScript Libraries
- added React Mar 2019 · JavaScript Frameworks
- added Stripe Mar 2019 · Payment Processors
- dropped styled-components Mar 2019 · JavaScript Frameworks
- added Amazon Web Services Feb 2019 · PaaS
- added Cloudflare Feb 2019 · CDN
2018 8 added · 2 dropped
- added Intercom Nov 2018 · Analytics
- dropped Amazon S3 Oct 2018 · Miscellaneous
- dropped jQuery Oct 2018 · JavaScript Libraries
- added Google Font API Sep 2018 · Font Scripts
- added Google Maps Sep 2018 · Maps
- added Lodash Sep 2018 · JavaScript Libraries
- added Nginx Sep 2018 · Web Servers
- added React Sep 2018 · JavaScript Frameworks
- added Stripe Sep 2018 · Payment Processors
- added styled-components Sep 2018 · Dev Tools