# What does CliffsNotes use? CliffsNotes (cliffsnotes.com) shows public evidence of 25 tools, according to runsonwhat (last checked 2026-10-20). ## 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 | Website code | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code | | | [Tailwind CSS](https://www.runsonwhat.com/reverse/tailwind) | Frontend | 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 | | | [Amplitude](https://www.runsonwhat.com/reverse/amplitude) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code | | | [Google Ad Manager](https://www.runsonwhat.com/reverse/google-ad-manager) | Ads & Pixels | Website config | | | [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Custom domain, Email records, Website code | | | [Microsoft Xandr](https://www.runsonwhat.com/reverse/xandr) | Ads & Pixels | Website config | | | [Magnite](https://www.runsonwhat.com/reverse/magnite) | Ads & Pixels | Website config | | | [PubMatic](https://www.runsonwhat.com/reverse/pubmatic) | Ads & Pixels | Website config | | | [OpenX](https://www.runsonwhat.com/reverse/openx) | Ads & Pixels | Website config | | | [Media.net](https://www.runsonwhat.com/reverse/media-net) | Ads & Pixels | Website config | | | [Index Exchange](https://www.runsonwhat.com/reverse/index-exchange) | Ads & Pixels | Website config | | | [Sharethrough](https://www.runsonwhat.com/reverse/sharethrough) | Ads & Pixels | Website config | | | [Help Scout](https://www.runsonwhat.com/reverse/helpscout) | Support & Docs | Email records | | ## 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 | Email records | | | [Amazon SES](https://www.runsonwhat.com/reverse/ses) | Email Delivery | Email records, Website code | | | [GlobalSign](https://www.runsonwhat.com/reverse/globalsign) | Security & Compliance | DNS verification records | | | [OneTrust](https://www.runsonwhat.com/reverse/onetrust) | Security & Compliance | Website code | | | [Sift](https://www.runsonwhat.com/reverse/sift) | Security & Compliance | Website code | | ## FAQ ### What tools does CliffsNotes use? As of October 2026, runsonwhat has found 25 tools at CliffsNotes (cliffsnotes.com) in public records. Edge & Hosting: Cloudflare and Amazon Web Services. Application: React and Tailwind CSS. Data & Observability: Google Analytics, Google Tag Manager and Amplitude. Go-to-market: Google Ads, Google Ad Manager and Zendesk. Company Ops: Google Workspace, SendGrid and Amazon SES. Last checked October 20, 2026. ### What cloud does CliffsNotes run on? CliffsNotes uses Amazon Web Services for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on cliffsnotes.com. Amazon Web Services is used by 146,186 companies runsonwhat tracks. ### What email provider does CliffsNotes use? CliffsNotes uses Google Workspace for email and office software, according to runsonwhat (October 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace and code on cliffsnotes.com. Google Workspace is used by 406,706 companies runsonwhat tracks. ### What does CliffsNotes use for customer support? CliffsNotes uses Zendesk for customer support and documentation, alongside Help Scout, according to runsonwhat (October 2026). runsonwhat found Zendesk through a subdomain that points at Zendesk and email records. Zendesk is used by 42,428 companies runsonwhat tracks. ### What analytics tools does CliffsNotes use? CliffsNotes uses Google Analytics for analytics, alongside Google Tag Manager and Amplitude, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on cliffsnotes.com. Google Analytics is used by 899,489 companies runsonwhat tracks. ### Does CliffsNotes use Cloudflare? Yes. runsonwhat found Cloudflare at CliffsNotes through DNS records that point at Cloudflare and code on cliffsnotes.com. Cloudflare is a CDN & Edge tool used by 714,382 companies runsonwhat tracks. ### Which companies have a tech stack similar to CliffsNotes's? The companies with the stacks most like CliffsNotes' are عطارة روح الطبيعة وصفات طبيعية زيوت عسل بهارات اعشاب مكسرات, منتجات هاتش, Edukazi.com and باك كير مراتب طبية و أسرة و كراسي راحة ومساج في السعودية, according to runsonwhat (October 2026). Each shares 4 to 9 tools with CliffsNotes, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what CliffsNotes uses? runsonwhat reads public records only. Of the 25 tools at CliffsNotes, 9 were found through code on cliffsnotes.com, 8 through website configuration files, 4 through email records, 3 through DNS records and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and cliffsnotes.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/cliffsnotes.com (updated October 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.