Ansafi
Sign inStart free
2026-08-01 crawl · observed, not inferred

Technology used by pen.org

PEN America stands at the intersection of literature and human rights to protect free expression in the United States and worldwide.

50
technologies detected
pen america
company
51-200
employees
writing and editing
industry
New York, united states
location

Recent changes

2026-07-01 dropped WordPress Multisiteconfirmed
2026-07-01 dropped Amazon CloudFrontprovisional
2026-07-01 dropped Microsoft ASP.NETprovisional
2026-07-01 dropped WordPress Site Editorconfirmed
2026-06-01 dropped AngularJSconfirmed
2026-06-01 dropped Bootstrapconfirmed
2026-06-01 dropped cdnjsconfirmed
2026-06-01 dropped Microsoft Application Insightsconfirmed
2026-06-01 dropped CKEditorconfirmed
2026-04-01 dropped AngularJSprovisional
2026-04-01 dropped Bootstrapprovisional
2026-04-01 dropped Cloudflare Bot Managementprovisional

Full detected stack

Everything detected on this domain in the latest monthly crawl, grouped by what it does. ↩ marks when we first observed it — no later than that date, not necessarily when they adopted it. Faded dates were seen in fewer than four crawls.

WordPress plugins
Speculative Loading1.6.0|1.6.0↩ Sept 2024Site Kit1.183.0|1.183.0↩ Apr 2026Performant Translations1.2.0|1.2.0↩ Sept 2024Performance Lab4.2.0|4.2.0↩ Apr 2024Optimization Detective1.0.0|1.0.0↩ Sept 2024Image Prioritizer1.0.0|1.0.0↩ Sept 2024Image Placeholders1.2.1|1.2.1↩ Sept 2024Enhanced Responsive Images1.7.0|1.7.0↩ Sept 2024Embed Optimizer1.0.0|1.0.0↩ Sept 2024
JavaScript libraries
Underscore.js↩ May 2018core-js3.15.2↩ Sept 2021Preact↩ Jun 2023Lodash4.17.21↩ Jul 2021jQuery Migrate3.4.1↩ Oct 2017jQuery3.7.1↩ Oct 2017
Analytics
TikTok Pixel↩ Jan 2026Mouse Flow↩ Apr 2023Linkedin Insight Tag↩ Sept 2022Google Analytics↩ May 2018Facebook Pixel2.9.377↩ Jul 2021Cloudflare Browser Insights↩ May 2024
CDN
Fastly↩ Jun 2021Cloudflare↩ Sept 2020Amazon S3↩ May 2026
Advertising
Linkedin Ads↩ Dec 2025Twitter Ads↩ Jul 2021Microsoft Advertising↩ Dec 2022
Security
Very Good Security↩ Sept 2024HSTS↩ Sept 2022Cloudflare Bot Management↩ Mar 2022
Databases
MySQL↩ May 2018MariaDB↩ Apr 2020
PaaS
Amazon Web Services↩ Aug 2024Pantheon↩ Apr 2020
SEO
Yoast SEO Premium28.1↩ Oct 2025Yoast SEO28.1|28.1↩ Jan 2019
Email
Mailgun↩ Aug 2022Google Workspace↩ Aug 2022
Miscellaneous
RSS↩ Dec 2022Open Graph↩ Sept 2022
Page builders
WordPress Block Editor↩ Jul 2024
CMS
WordPress↩ May 2017
Programming languages
PHP↩ May 2018
Caching
Varnish↩ Apr 2020
Web servers
Nginx↩ May 2017
JavaScript frameworks
Backbone.js1.1.2↩ Sept 2024
Performance
Priority Hints↩ Sept 2023
RUM
New Relic↩ Aug 2022
Tag managers
Google Tag Manager↩ Jan 2019
Fundraising & donations
EveryAction↩ Sept 2024
Who else runs this stack?

Build a list of companies using any of these, filtered by size, industry and country — with every prospect's full stack attached.

Build a list →