# What does a0.dev use? a0.dev (a0.dev) shows public evidence of 24 tools, according to runsonwhat (last checked 2026-10-09). - Industry: Engineering, Product and Design - Size: 1–10 employees - Based in: San Francisco, United States ## 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 | Custom domain | | | [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | Custom domain, DNS verification records, DNS records, Website code | | | [Namecheap](https://www.runsonwhat.com/reverse/namecheap) | DNS | Email records | | ## 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 | | | [Stripe](https://www.runsonwhat.com/reverse/stripe) | Payments & Billing | Website code | | | [Supabase](https://www.runsonwhat.com/reverse/supabase) | Backend & Database | Website code | | | [Angular](https://www.runsonwhat.com/reverse/angular) | Frontend | Website code | | | [Rive](https://www.runsonwhat.com/reverse/rive) | 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 | | | [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 | | | [Better Stack](https://www.runsonwhat.com/reverse/betterstack) | Monitoring | Custom domain | | ## 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 | | | [Brevo](https://www.runsonwhat.com/reverse/brevo) | Marketing | DNS verification records | | | [Calendly](https://www.runsonwhat.com/reverse/calendly) | Sales & CRM | Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records | | | [Resend](https://www.runsonwhat.com/reverse/resend) | Email Delivery | Email records | | ## Recent changes at a0.dev - 2026-10-09: started using [Namecheap](https://www.runsonwhat.com/reverse/namecheap) ## FAQ ### What tools does a0.dev use? As of October 2026, runsonwhat has found 24 tools at a0.dev (a0.dev) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Vercel. Application: React, Tailwind CSS and Next.js. Data & Observability: Google Analytics, Google Tag Manager and web-vitals. Go-to-market: Google Ads, Meta Pixel and Brevo. Company Ops: Google Workspace and Resend. Last checked October 9, 2026. ### What cloud does a0.dev run on? a0.dev uses Amazon Web Services for hosting and cloud infrastructure, alongside Vercel, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through a subdomain that points at Amazon Web Services. Amazon Web Services is used by 144,293 companies runsonwhat tracks. ### What sales tools does a0.dev use? The sales tools runsonwhat has found at a0.dev are Calendly (October 2026); no CRM shows up in a0.dev's public records. runsonwhat found Calendly through Calendly code on a0.dev. Calendly is used by 23,560 companies runsonwhat tracks. ### What email provider does a0.dev use? a0.dev uses Google Workspace for email and office software, according to runsonwhat (October 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace. Google Workspace is used by 393,483 companies runsonwhat tracks. ### What payment provider does a0.dev use? a0.dev uses Stripe for payments and billing, according to runsonwhat (October 2026). runsonwhat found Stripe through Stripe code on a0.dev. Stripe is used by 25,651 companies runsonwhat tracks. ### What analytics tools does a0.dev use? a0.dev uses Google Analytics for analytics, alongside Google Tag Manager, PostHog and Vercel Analytics, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on a0.dev. Google Analytics is used by 839,526 companies runsonwhat tracks. ### Does a0.dev use Cloudflare? Yes. runsonwhat found Cloudflare at a0.dev through DNS records that point at Cloudflare and code on a0.dev. Cloudflare is a CDN & Edge tool used by 686,732 companies runsonwhat tracks. ### Has a0.dev changed tools recently? Yes. On runsonwhat's rechecks, a0.dev started using Namecheap (latest on October 9, 2026). A change counts only between two checks of a0.dev done the same way. ### Which companies have a tech stack similar to a0.dev's? The companies with the stacks most like a0.dev's are Frigade, Confident AI, Spine and Stacksync, according to runsonwhat (October 2026). Each shares 9 to 14 tools with a0.dev, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what a0.dev uses? runsonwhat reads public records only. Of the 24 tools at a0.dev, 15 were found through code on a0.dev, 3 through DNS records, 3 through email records and 3 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and a0.dev about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/a0.dev (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.