# What does G Pen use? G Pen (gpen.com) shows public evidence of 36 tools, according to runsonwhat (last checked 2026-11-03). - Industry: Consumer Electronics - Size: 11–50 employees - Based in: St Louis, United States - Founded: 2012 - LinkedIn: https://www.linkedin.com/company/grenco-science-inc ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Website code | | | [GoDaddy](https://www.runsonwhat.com/reverse/godaddy) | DNS | DNS records, Website code | | | [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | Custom domain | | | [GitHub Pages](https://www.runsonwhat.com/reverse/github-pages) | Hosting & Cloud | Custom domain | 2026-09 | | [Heroku](https://www.runsonwhat.com/reverse/heroku) | Hosting & Cloud | Custom domain | 2020-02 | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code | | | [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code | | | [Font Awesome](https://www.runsonwhat.com/reverse/fontawesome) | Media & UI | Website code | | | [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code | | | [Adobe Fonts](https://www.runsonwhat.com/reverse/adobe-fonts) | Media & UI | Website code | | | [Vue.js](https://www.runsonwhat.com/reverse/vue) | Frontend | Website code | | | [Sezzle](https://www.runsonwhat.com/reverse/sezzle) | Payments & Billing | Website code | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code | | | [Google Tag Manager](https://www.runsonwhat.com/reverse/gtm) | Analytics | Website code | | | [Sentry](https://www.runsonwhat.com/reverse/sentry) | Monitoring | Website code | | | [Triple Whale](https://www.runsonwhat.com/reverse/triple-whale) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [WordPress](https://www.runsonwhat.com/reverse/wordpress) | Website & CMS | Website code | | | [Meta Pixel](https://www.runsonwhat.com/reverse/meta-pixel) | Ads & Pixels | Website code | | | [HubSpot](https://www.runsonwhat.com/reverse/hubspot) | Sales & CRM | Website code | | | [WooCommerce](https://www.runsonwhat.com/reverse/woocommerce) | Website & CMS | Website code | | | [Rank Math](https://www.runsonwhat.com/reverse/rankmath) | Website & CMS | Website code | | | [Shopify](https://www.runsonwhat.com/reverse/shopify) | Website & CMS | Email records, Website code | | | [Klaviyo](https://www.runsonwhat.com/reverse/klaviyo) | Marketing | DNS verification records, Website code | | | [Webflow](https://www.runsonwhat.com/reverse/webflow) | Website & CMS | Website code | | | [Salesforce](https://www.runsonwhat.com/reverse/salesforce) | Sales & CRM | Email records, Website code | | | [X Ads](https://www.runsonwhat.com/reverse/x-ads) | Ads & Pixels | Website code | | | [Quantcast](https://www.runsonwhat.com/reverse/quantcast) | Ads & Pixels | Website code | | | [Yotpo](https://www.runsonwhat.com/reverse/yotpo) | Marketing | Website code | | | [PushOwl](https://www.runsonwhat.com/reverse/pushowl) | Marketing | Website code | | | [Dstillery](https://www.runsonwhat.com/reverse/dstillery) | Ads & Pixels | Website code | | | [Grin](https://www.runsonwhat.com/reverse/grin) | Marketing | Website code | | | [PickyStory](https://www.runsonwhat.com/reverse/pickystory) | Marketing | Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records, Website code | | | [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Custom domain, Email records | | | [NetSuite](https://www.runsonwhat.com/reverse/netsuite) | Finance & Legal | Email records | | ## FAQ ### What tools does G Pen use? As of November 2026, runsonwhat has found 36 tools at G Pen (gpen.com) in public records. Edge & Hosting: Cloudflare, GoDaddy and Vercel. Application: jQuery, Google Fonts and Font Awesome. Data & Observability: Google Analytics, Google Tag Manager and Sentry. Go-to-market: WordPress, Meta Pixel and HubSpot. Company Ops: Google Workspace, SendGrid and NetSuite. Last checked November 3, 2026. ### What cloud does G Pen run on? G Pen uses Vercel for hosting and cloud infrastructure, alongside GitHub Pages and Heroku, according to runsonwhat (November 2026). runsonwhat found Vercel through a subdomain that points at Vercel. Vercel is used by 52,584 companies runsonwhat tracks. ### What CRM does G Pen use? G Pen uses HubSpot for its CRM, alongside Salesforce, according to runsonwhat (November 2026). runsonwhat found HubSpot through HubSpot code on gpen.com. HubSpot is used by 97,276 companies runsonwhat tracks. ### What email provider does G Pen use? G Pen uses Google Workspace for email and office software, according to runsonwhat (November 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace and code on gpen.com. Google Workspace is used by 418,014 companies runsonwhat tracks. ### What payment provider does G Pen use? G Pen uses Sezzle for payments and billing, according to runsonwhat (November 2026). runsonwhat found Sezzle through Sezzle code on gpen.com. Sezzle is used by 397 companies runsonwhat tracks. ### What analytics tools does G Pen use? G Pen uses Google Analytics for analytics, alongside Google Tag Manager and Triple Whale, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on gpen.com. Google Analytics is used by 903,766 companies runsonwhat tracks. ### How long has G Pen used Heroku? G Pen has used Heroku since at least February 2020, going by the first public certificate of the gpen.com subdomain that points at Heroku. Other long-running tools at G Pen include GitHub Pages (since September 2026). ### Does G Pen use jQuery? Yes. runsonwhat found jQuery at G Pen through jQuery code on gpen.com. jQuery is a Frontend tool used by 927,163 companies runsonwhat tracks. ### Which companies have a tech stack similar to G Pen's? The companies with the stacks most like G Pen's are Stündenglass: Gravity Hookahs and Infusers, 420 Science, Live Tinted and Marley's Monsters, according to runsonwhat (November 2026). Each shares 10 to 24 tools with G Pen, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what G Pen uses? runsonwhat reads public records only. Of the 36 tools at G Pen, 25 were found through code on gpen.com, 4 through email records, 4 through subdomains that point at the vendor and 3 through DNS records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and gpen.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/gpen.com (updated November 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.