# What does Chainlink use? Chainlink (chain.link) shows public evidence of 35 tools, according to runsonwhat (last checked 2026-10-20). - LinkedIn: https://www.linkedin.com/company/chainlink-labs ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Website code | | | [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | DNS verification records | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code | | | [GSAP](https://www.runsonwhat.com/reverse/gsap) | Media & UI | Website code | | | [Adobe Fonts](https://www.runsonwhat.com/reverse/adobe-fonts) | Media & UI | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | | [Auth0](https://www.runsonwhat.com/reverse/auth0) | Auth & Identity | Custom domain, Website config | 2025-10 | | [Vidyard](https://www.runsonwhat.com/reverse/vidyard) | Media & UI | 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 | | | [Intellimize](https://www.runsonwhat.com/reverse/intellimize) | Flags & Experiments | 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 | Website code | | | [LinkedIn Insight Tag](https://www.runsonwhat.com/reverse/linkedin-insight) | Ads & Pixels | Website code | | | [HubSpot](https://www.runsonwhat.com/reverse/hubspot) | Sales & CRM | Custom domain, Email records, Website code | 2022-04 | | [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Custom domain, Email records, Website code | 2025-03 | | [Microsoft Xandr](https://www.runsonwhat.com/reverse/xandr) | Ads & Pixels | Website code | | | [Webflow](https://www.runsonwhat.com/reverse/webflow) | Website & CMS | Custom domain, Website code | | | [Salesforce](https://www.runsonwhat.com/reverse/salesforce) | Sales & CRM | Email records, Website code | | | [HubSpot CMS](https://www.runsonwhat.com/reverse/hubspot-cms) | Website & CMS | Custom domain | 2022-04 | | [X Ads](https://www.runsonwhat.com/reverse/x-ads) | Ads & Pixels | Website code | | | [Discord](https://www.runsonwhat.com/reverse/discord) | Support & Docs | Website code | | ## 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 | | | [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records | | | [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 | | | [Proofpoint](https://www.runsonwhat.com/reverse/proofpoint) | Security & Compliance | Email records | | | [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 | | | [Cloudflare Turnstile](https://www.runsonwhat.com/reverse/turnstile) | Security & Compliance | Website code | | | [Amazon Trust Services](https://www.runsonwhat.com/reverse/amazon-trust) | Security & Compliance | DNS records | | ## FAQ ### What tools does Chainlink use? As of October 2026, runsonwhat has found 35 tools at Chainlink (chain.link) in public records. Edge & Hosting: Cloudflare and Vercel. Application: jQuery, GSAP and Adobe Fonts. Data & Observability: Google Analytics, Google Tag Manager and Intellimize. Go-to-market: Google Ads, Meta Pixel and LinkedIn Insight Tag. Company Ops: Microsoft 365, Google Workspace and SendGrid. Last checked October 20, 2026. ### What cloud does Chainlink run on? Chainlink uses Vercel for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Vercel through a DNS verification record for Vercel. Vercel is used by 49,700 companies runsonwhat tracks. ### What CRM does Chainlink use? Chainlink uses HubSpot for its CRM, alongside Salesforce, according to runsonwhat (October 2026). runsonwhat found HubSpot through a subdomain that points at HubSpot and email records, and Chainlink has used it since at least April 2022. HubSpot is used by 95,220 companies runsonwhat tracks. ### What email provider does Chainlink use? Chainlink 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 715,785 companies runsonwhat tracks. ### What does Chainlink use for customer support? Chainlink uses Zendesk for customer support and documentation, alongside Discord, according to runsonwhat (October 2026). runsonwhat found Zendesk through a subdomain that points at Zendesk and email records, and Chainlink has used it since at least March 2025. Zendesk is used by 42,367 companies runsonwhat tracks. ### What analytics tools does Chainlink use? Chainlink uses Google Analytics for analytics, alongside Google Tag Manager, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on chain.link. Google Analytics is used by 894,565 companies runsonwhat tracks. ### How long has Chainlink used HubSpot? Chainlink has used HubSpot since at least April 2022, going by the first public certificate of the chain.link subdomain that points at HubSpot. Other long-running tools at Chainlink include HubSpot CMS (since April 2022), Zendesk (since March 2025) and Auth0 (since October 2025). ### Does Chainlink use jQuery? Yes. runsonwhat found jQuery at Chainlink through jQuery code on chain.link. jQuery is a Frontend tool used by 923,440 companies runsonwhat tracks. ### Does Chainlink use AI tools? Yes. runsonwhat has found Anthropic at Chainlink; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Chainlink may use more AI tools than these. ### Which companies have a tech stack similar to Chainlink's? The companies with the stacks most like Chainlink's are General Catalyst, Venn, Veritystream By Healthstream and RePro Stream, according to runsonwhat (October 2026). Each shares 10 to 14 tools with Chainlink, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Chainlink uses? runsonwhat reads public records only. Of the 35 tools at Chainlink, 14 were found through code on chain.link, 11 through DNS records, 5 through subdomains that point at the vendor, 4 through email records and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and chain.link about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/chain.link (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.