# What does Extend use? Extend (extend.ai) shows public evidence of 26 tools, according to runsonwhat (last checked 2026-11-06). - Industry: Artificial Intelligence - Size: 11–50 employees - Based in: New York, United States - Founded: 2023 - LinkedIn: https://www.linkedin.com/company/extend-app ## 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 | | | [Amazon CloudFront](https://www.runsonwhat.com/reverse/cloudfront) | CDN & Edge | Custom domain | 2026-10 | | [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | Custom domain, DNS verification records, DNS records, 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 | | | [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code | | | [Lottie](https://www.runsonwhat.com/reverse/lottie) | Media & UI | Website code | | | [MCP Registry](https://www.runsonwhat.com/reverse/mcp-registry) | AI | DNS verification records | | | [WorkOS](https://www.runsonwhat.com/reverse/workos) | Auth & Identity | Custom domain | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code | | | [web-vitals](https://www.runsonwhat.com/reverse/web-vitals) | Monitoring | Website code | | | [PostHog](https://www.runsonwhat.com/reverse/posthog) | Analytics | Website code | | | [Vercel Analytics](https://www.runsonwhat.com/reverse/vercel-analytics) | Analytics | Website code | | | [incident.io](https://www.runsonwhat.com/reverse/incidentio) | Monitoring | Custom domain | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code | | | [HubSpot](https://www.runsonwhat.com/reverse/hubspot) | Sales & CRM | Website code | | | [RB2B](https://www.runsonwhat.com/reverse/rb2b) | Sales & CRM | Website code | | | [Short.io](https://www.runsonwhat.com/reverse/short-io) | Marketing | Custom domain | | | [Snitcher](https://www.runsonwhat.com/reverse/snitcher) | Sales & CRM | Website code | | | [Unify](https://www.runsonwhat.com/reverse/unify) | Sales & CRM | Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | DNS verification records, Email records, Website code | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | | [Vanta](https://www.runsonwhat.com/reverse/vanta) | Security & Compliance | Custom domain | | ## Recent changes at Extend - 2026-11-06: started using again [Apple Business](https://www.runsonwhat.com/reverse/apple) - 2026-11-06: started using [Amazon CloudFront](https://www.runsonwhat.com/reverse/cloudfront) - 2026-11-06: started using again [Google Search Console](https://www.runsonwhat.com/reverse/gsc) - 2026-11-06: started using again [MCP Registry](https://www.runsonwhat.com/reverse/mcp-registry) - 2026-11-06: stopped using [CleanShot Cloud](https://www.runsonwhat.com/reverse/cleanshot) - 2026-11-02: stopped using [Apple Business](https://www.runsonwhat.com/reverse/apple) - 2026-11-02: stopped using [MCP Registry](https://www.runsonwhat.com/reverse/mcp-registry) - 2026-11-02: stopped using [Google Search Console](https://www.runsonwhat.com/reverse/gsc) ## FAQ ### What tools does Extend use? As of November 2026, runsonwhat has found 26 tools at Extend (extend.ai) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Amazon CloudFront. Application: React, Tailwind CSS and Next.js. Data & Observability: Google Analytics, web-vitals and PostHog. Go-to-market: Google Ads, HubSpot and RB2B. Company Ops: Google Workspace, Apple Business and Vanta. Last checked November 6, 2026. ### What cloud does Extend run on? Extend uses Amazon Web Services for hosting and cloud infrastructure, alongside Vercel, according to runsonwhat (November 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on extend.ai. Amazon Web Services is used by 147,439 companies runsonwhat tracks. ### What CRM does Extend use? Extend uses HubSpot for its CRM, alongside RB2B, Snitcher and Unify, according to runsonwhat (November 2026). runsonwhat found HubSpot through HubSpot code on extend.ai. HubSpot is used by 97,600 companies runsonwhat tracks. ### What email provider does Extend use? Extend uses Google Workspace for email and office software, alongside Apple Business, according to runsonwhat (November 2026). runsonwhat found Google Workspace through a DNS verification record for Google Workspace and email records. Google Workspace is used by 420,064 companies runsonwhat tracks. ### What analytics tools does Extend use? Extend uses Google Analytics for analytics, alongside PostHog and Vercel Analytics, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on extend.ai. Google Analytics is used by 903,864 companies runsonwhat tracks. ### What marketing software does Extend use? Extend uses Short.io for marketing, according to runsonwhat (November 2026). runsonwhat found Short.io through a subdomain that points at Short.io. Short.io is used by 1,456 companies runsonwhat tracks. ### How long has Extend used Amazon CloudFront? Extend has used Amazon CloudFront since at least October 2026, going by the first public certificate of the extend.ai subdomain that points at Amazon CloudFront. ### Does Extend use Cloudflare? Yes. runsonwhat found Cloudflare at Extend through DNS records that point at Cloudflare and code on extend.ai. Cloudflare is a CDN & Edge tool used by 733,023 companies runsonwhat tracks. ### Does Extend use AI tools? Yes. runsonwhat has found MCP Registry at Extend; MCP Registry, for example, through a DNS verification record for MCP Registry. AI services called only from servers leave no public trace, so Extend may use more AI tools than these. ### Has Extend changed tools recently? Yes. On runsonwhat's rechecks, Extend started using Apple Business, Amazon CloudFront and Google Search Console (latest on November 6, 2026) and stopped using CleanShot Cloud, Apple Business and MCP Registry (latest on November 6, 2026). A change counts only between two checks of extend.ai done the same way. ### Which companies have a tech stack similar to Extend's? The companies with the stacks most like Extend's are Amplitude, Mintlify, Paddle.com Market and Twelverays, according to runsonwhat (November 2026). Each shares 9 to 18 tools with Extend, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Extend uses? runsonwhat reads public records only. Of the 26 tools at Extend, 14 were found through code on extend.ai, 6 through subdomains that point at the vendor, 5 through DNS records and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and extend.ai about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/extend.ai (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.