What does Kayak use?

As of October 2026, runsonwhat has found 64 tools at Kayak (kayak.com) in public records. Edge & Hosting: Cloudflare, Fastly and Vercel. Application: Google Fonts, React and Anthropic. Data & Observability: Google Analytics, Google Tag Manager and FullStory. Go-to-market: Google Ads, Microsoft Ads and LinkedIn Insight Tag. Company Ops: Microsoft 365, Google Workspace and reCAPTCHA. Last checked October 20, 2026.

Kayak 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 47,910 companies runsonwhat tracks.

Kayak uses Microsoft 365 for email and office software, alongside Google Workspace and Apple Business, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 709,036 companies runsonwhat tracks.

Kayak uses Zendesk for customer support and documentation, alongside Help Scout, according to runsonwhat (October 2026). runsonwhat found Zendesk through email records that authorize Zendesk and code on kayak.com. Zendesk is used by 41,615 companies runsonwhat tracks.

Kayak uses Stripe for payments and billing, according to runsonwhat (October 2026). runsonwhat found Stripe through a DNS verification record for Stripe and code on kayak.com. Stripe is used by 27,759 companies runsonwhat tracks.

Kayak uses Google Analytics for analytics, alongside Google Tag Manager, FullStory and Usabilla, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on kayak.com. Google Analytics is used by 875,532 companies runsonwhat tracks.

Kayak has used MoEngage since at least June 2025, going by the first public certificate of the kayak.com subdomain that points at MoEngage.

Yes. runsonwhat found Google Fonts at Kayak through Google Fonts code on kayak.com. Google Fonts is a Media & UI tool used by 806,736 companies runsonwhat tracks.

Yes. runsonwhat has found Anthropic and OpenAI at Kayak; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Kayak may use more AI tools than these.

Yes. On runsonwhat's rechecks, Kayak started using KnowBe4 (latest on October 9, 2026). A change counts only between two checks of kayak.com done the same way.

The companies with the stacks most like Kayak's are Kayak, Kayak, Home Chef and Shoppers Drug Mart, according to runsonwhat (October 2026). Each shares 21 to 24 tools with Kayak, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

runsonwhat reads public records only. Of the 64 tools at Kayak, 30 were found through DNS records, 21 through code on kayak.com, 9 through email records, 2 through website configuration files 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 kayak.com about monthly.