# What does Greenbook use? Greenbook (greenbook.org) shows public evidence of 19 tools, according to runsonwhat (last checked 2026-10-28). - LinkedIn: https://www.linkedin.com/company/greenbook ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Website code | | | [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Custom domain | | | [Google Cloud](https://www.runsonwhat.com/reverse/gcp) | Hosting & Cloud | Custom domain | | | [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | DNS records, Website code | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Tag Manager](https://www.runsonwhat.com/reverse/gtm) | Analytics | Website code | | | [Sentry](https://www.runsonwhat.com/reverse/sentry) | Monitoring | Website code | | | [PostHog](https://www.runsonwhat.com/reverse/posthog) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [HubSpot](https://www.runsonwhat.com/reverse/hubspot) | Sales & CRM | Email records | | | [Google Ad Manager](https://www.runsonwhat.com/reverse/google-ad-manager) | Ads & Pixels | Website code | | | [Salesforce](https://www.runsonwhat.com/reverse/salesforce) | Sales & CRM | Email records | | | [LinkedIn](https://www.runsonwhat.com/reverse/linkedin) | Marketing | DNS verification records | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records | | | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | | [Amazon SES](https://www.runsonwhat.com/reverse/ses) | Email Delivery | DNS verification records | | | [Uber for Business](https://www.runsonwhat.com/reverse/uber) | Finance & Legal | DNS verification records | | ## FAQ ### What tools does Greenbook use? As of November 2026, runsonwhat has found 19 tools at Greenbook (greenbook.org) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Google Cloud. Application: Next.js and Anthropic. Data & Observability: Google Tag Manager, Sentry and PostHog. Go-to-market: HubSpot, Google Ad Manager and Salesforce. Company Ops: Microsoft 365, Google Workspace and Apple Business. Last checked October 28, 2026. ### What cloud does Greenbook run on? Greenbook uses Amazon Web Services for hosting and cloud infrastructure, alongside Google Cloud and Vercel, according to runsonwhat (November 2026). runsonwhat found Amazon Web Services through a subdomain that points at Amazon Web Services. Amazon Web Services is used by 146,671 companies runsonwhat tracks. ### What CRM does Greenbook use? Greenbook uses HubSpot for its CRM, alongside Salesforce, according to runsonwhat (November 2026). runsonwhat found HubSpot through email records that authorize HubSpot. HubSpot is used by 96,187 companies runsonwhat tracks. ### What email provider does Greenbook use? Greenbook uses Microsoft 365 for email and office software, alongside Google Workspace and Apple Business, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 719,198 companies runsonwhat tracks. ### What analytics tools does Greenbook use? Greenbook uses Google Tag Manager for analytics, alongside PostHog, according to runsonwhat (November 2026). runsonwhat found Google Tag Manager through Google Tag Manager code on greenbook.org. Google Tag Manager is used by 515,330 companies runsonwhat tracks. ### What marketing software does Greenbook use? Greenbook uses LinkedIn for marketing, according to runsonwhat (November 2026). runsonwhat found LinkedIn through a DNS verification record for LinkedIn. LinkedIn is used by 14,908 companies runsonwhat tracks. ### Does Greenbook use Cloudflare? Yes. runsonwhat found Cloudflare at Greenbook through DNS records that point at Cloudflare and code on greenbook.org. Cloudflare is a CDN & Edge tool used by 723,957 companies runsonwhat tracks. ### Does Greenbook use AI tools? Yes. runsonwhat has found Anthropic at Greenbook; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Greenbook may use more AI tools than these. ### Which companies have a tech stack similar to Greenbook's? The companies with the stacks most like Greenbook's are BNY, Infobip, U.s. Silica Company and Zenvia, according to runsonwhat (November 2026). Each shares 5 to 11 tools with Greenbook, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Greenbook uses? runsonwhat reads public records only. Of the 19 tools at Greenbook, 9 were found through DNS records, 5 through code on greenbook.org, 3 through email records and 2 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and greenbook.org about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/greenbook.org (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.