# What does Quillbot use? Quillbot (quillbot.com) shows public evidence of 43 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 | | | [Google Cloud](https://www.runsonwhat.com/reverse/gcp) | Hosting & Cloud | Website code | | | [Fastly](https://www.runsonwhat.com/reverse/fastly) | CDN & Edge | DNS records | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code | | | [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | | [Firebase](https://www.runsonwhat.com/reverse/firebase) | Backend & Database | DNS records, DNS verification records | | ## 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 | | | [Microsoft Clarity](https://www.runsonwhat.com/reverse/clarity) | Analytics | Website code | | | [Sentry](https://www.runsonwhat.com/reverse/sentry) | Monitoring | Custom domain, 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 | | | [Meta Pixel](https://www.runsonwhat.com/reverse/meta-pixel) | Ads & Pixels | DNS verification records, Website code | | | [Microsoft Ads](https://www.runsonwhat.com/reverse/bing-ads) | Ads & Pixels | Website code | | | [LinkedIn Insight Tag](https://www.runsonwhat.com/reverse/linkedin-insight) | Ads & Pixels | Website code | | | [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Custom domain, Email records, Website code | 2021-10 | | [Klaviyo](https://www.runsonwhat.com/reverse/klaviyo) | Marketing | DNS verification records | | | [ChatGPT Ads](https://www.runsonwhat.com/reverse/chatgpt-ads) | Ads & Pixels | Website code | | | [Amazon Advertising](https://www.runsonwhat.com/reverse/amazon-advertising) | Ads & Pixels | Website code | | | [Quora Ads](https://www.runsonwhat.com/reverse/quora-ads) | Ads & Pixels | Website code | | | [Brave Creators](https://www.runsonwhat.com/reverse/brave) | Marketing | DNS verification records | | | [PartnerStack](https://www.runsonwhat.com/reverse/partnerstack) | Marketing | Custom domain, Website code | 2022-10 | ## 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, Website code | | | [reCAPTCHA](https://www.runsonwhat.com/reverse/recaptcha) | Security & Compliance | Website code | | | [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records, Website code | | | [Atlassian](https://www.runsonwhat.com/reverse/atlassian) | Dev Tools | DNS verification records | | | [Let's Encrypt](https://www.runsonwhat.com/reverse/letsencrypt) | Security & Compliance | DNS records | | | [Mailgun](https://www.runsonwhat.com/reverse/mailgun) | Email Delivery | Custom domain | | | [Sectigo](https://www.runsonwhat.com/reverse/sectigo) | Security & Compliance | DNS records | | | [DigiCert](https://www.runsonwhat.com/reverse/digicert) | Security & Compliance | DNS records | | | [Google Trust Services](https://www.runsonwhat.com/reverse/google-trust) | Security & Compliance | DNS records | | | [OneTrust](https://www.runsonwhat.com/reverse/onetrust) | Security & Compliance | Website code | | | [KnowBe4](https://www.runsonwhat.com/reverse/knowbe4) | Security & Compliance | DNS verification records | | | [Adobe](https://www.runsonwhat.com/reverse/adobe) | Collaboration | DNS verification records | | | [Zoom](https://www.runsonwhat.com/reverse/zoom) | Collaboration | DNS verification records | | | [Amazon Trust Services](https://www.runsonwhat.com/reverse/amazon-trust) | Security & Compliance | DNS records | | | [Cursor](https://www.runsonwhat.com/reverse/cursor) | Dev Tools | DNS verification records | | | [Figma](https://www.runsonwhat.com/reverse/figma) | Collaboration | DNS verification records | | | [Notion](https://www.runsonwhat.com/reverse/notion) | Collaboration | DNS verification records | | | [Gem](https://www.runsonwhat.com/reverse/gem) | People & HR | DNS verification records | | ## FAQ ### What tools does Quillbot use? As of October 2026, runsonwhat has found 43 tools at Quillbot (quillbot.com) in public records. Edge & Hosting: Cloudflare, Google Cloud and Fastly. Application: Google Fonts, React and Anthropic. Data & Observability: Google Analytics, Google Tag Manager and Microsoft Clarity. Go-to-market: Google Ads, Meta Pixel and Microsoft Ads. Company Ops: Microsoft 365, Google Workspace and reCAPTCHA. Last checked October 20, 2026. ### What cloud does Quillbot run on? Quillbot uses Google Cloud for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Google Cloud through Google Cloud code on quillbot.com. Google Cloud is used by 75,939 companies runsonwhat tracks. ### What email provider does Quillbot use? Quillbot uses Microsoft 365 for email and office software, alongside Google Workspace, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 712,557 companies runsonwhat tracks. ### What does Quillbot use for customer support? Quillbot uses Zendesk for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Zendesk through a subdomain that points at Zendesk and email records, and Quillbot has used it since at least October 2021. Zendesk is used by 42,039 companies runsonwhat tracks. ### What analytics tools does Quillbot use? Quillbot uses Google Analytics for analytics, alongside Google Tag Manager, Microsoft Clarity and Amplitude, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on quillbot.com. Google Analytics is used by 884,595 companies runsonwhat tracks. ### What marketing software does Quillbot use? Quillbot uses Klaviyo for marketing, alongside Brave Creators and PartnerStack, according to runsonwhat (October 2026). runsonwhat found Klaviyo through a DNS verification record for Klaviyo. Klaviyo is used by 35,330 companies runsonwhat tracks. ### How long has Quillbot used Zendesk? Quillbot has used Zendesk since at least October 2021, going by the first public certificate of the quillbot.com subdomain that points at Zendesk. Other long-running tools at Quillbot include PartnerStack (since October 2022). ### Does Quillbot use Google Fonts? Yes. runsonwhat found Google Fonts at Quillbot through Google Fonts code on quillbot.com. Google Fonts is a Media & UI tool used by 812,587 companies runsonwhat tracks. ### Does Quillbot use AI tools? Yes. runsonwhat has found Anthropic at Quillbot; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Quillbot may use more AI tools than these. ### Which companies have a tech stack similar to Quillbot's? The companies with the stacks most like Quillbot's are Quo, Xero, Outgrow and Outgrow, according to runsonwhat (October 2026). Each shares 13 to 27 tools with Quillbot, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Quillbot uses? runsonwhat reads public records only. Of the 43 tools at Quillbot, 22 were found through DNS records, 15 through code on quillbot.com, 4 through subdomains that point at the vendor and 2 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and quillbot.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/quillbot.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.