# What does Base39 use? Base39 (base39.com.br) shows public evidence of 26 tools, according to runsonwhat (last checked 2026-11-07). - Industry: Software - Size: 51–200 employees - Based in: São Paulo, Brazil - LinkedIn: https://www.linkedin.com/company/base39 ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Amazon Route 53](https://www.runsonwhat.com/reverse/route53) | DNS | DNS records | | | [Amazon CloudFront](https://www.runsonwhat.com/reverse/cloudfront) | CDN & Edge | Custom domain, Website code | | | [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | Custom domain, DNS verification records | 2023-08 | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | | [Stripe](https://www.runsonwhat.com/reverse/stripe) | Payments & Billing | DNS verification records | | | [Astro](https://www.runsonwhat.com/reverse/astro) | Frontend | Website code | | | [Auth0](https://www.runsonwhat.com/reverse/auth0) | Auth & Identity | Custom domain, Website config | 2024-11 | | [MongoDB Atlas](https://www.runsonwhat.com/reverse/mongodb) | Backend & Database | DNS verification records | | | [Clerk](https://www.runsonwhat.com/reverse/clerk) | Auth & Identity | Custom domain | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code | | | [PostHog](https://www.runsonwhat.com/reverse/posthog) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Meta Pixel](https://www.runsonwhat.com/reverse/meta-pixel) | Ads & Pixels | DNS verification records | | | [Apollo.io](https://www.runsonwhat.com/reverse/apollo) | Sales & CRM | Website code | | | [Dub](https://www.runsonwhat.com/reverse/dub) | Marketing | Custom domain | 2024-10 | ## 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 | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | | [Zoom](https://www.runsonwhat.com/reverse/zoom) | Collaboration | DNS verification records | | | [Slack](https://www.runsonwhat.com/reverse/slack) | Collaboration | DNS verification records | | | [Canva](https://www.runsonwhat.com/reverse/canva) | Collaboration | DNS verification records | | | [Box](https://www.runsonwhat.com/reverse/box) | Collaboration | DNS verification records | | | [Notion](https://www.runsonwhat.com/reverse/notion) | Collaboration | DNS verification records | | | [HubSpot App Developer](https://www.runsonwhat.com/reverse/hubspot-developer) | Dev Tools | DNS verification records | | | [Detectify](https://www.runsonwhat.com/reverse/detectify) | Security & Compliance | DNS verification records | | | [Lovable](https://www.runsonwhat.com/reverse/lovable) | Dev Tools | DNS verification records | | ## Recent changes at Base39 - 2026-11-07: started using [Astro](https://www.runsonwhat.com/reverse/astro) - 2026-11-07: started using [Clerk](https://www.runsonwhat.com/reverse/clerk) - 2026-11-07: stopped using [Framer](https://www.runsonwhat.com/reverse/framer) - 2026-11-07: stopped using [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) - 2026-11-07: stopped using [HubSpot](https://www.runsonwhat.com/reverse/hubspot) - 2026-11-07: stopped using [Resend](https://www.runsonwhat.com/reverse/resend) - 2026-10-23: stopped using [Zendesk](https://www.runsonwhat.com/reverse/zendesk) ## FAQ ### What tools does Base39 use? As of November 2026, runsonwhat has found 26 tools at Base39 (base39.com.br) in public records. Edge & Hosting: Amazon Route 53, Amazon CloudFront and Vercel. Application: Anthropic, Stripe and Astro. Data & Observability: Google Analytics and PostHog. Go-to-market: Meta Pixel, Apollo.io and Dub. Company Ops: Microsoft 365, Google Workspace and Apple Business. Last checked November 7, 2026. ### What cloud does Base39 run on? Base39 uses Vercel for hosting and cloud infrastructure, according to runsonwhat (November 2026). runsonwhat found Vercel through a subdomain that points at Vercel and a DNS verification record, and Base39 has used it since at least August 2023. Vercel is used by 53,205 companies runsonwhat tracks. ### What sales tools does Base39 use? The sales tools runsonwhat has found at Base39 are Apollo.io (November 2026); no CRM shows up in Base39's public records. runsonwhat found Apollo.io through Apollo.io code on base39.com.br. Apollo.io is used by 11,586 companies runsonwhat tracks. ### What email provider does Base39 use? Base39 uses Microsoft 365 for email and office software, alongside Google Workspace and Apple Business, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 734,184 companies runsonwhat tracks. ### What payment provider does Base39 use? Base39 uses Stripe for payments and billing, according to runsonwhat (November 2026). runsonwhat found Stripe through a DNS verification record for Stripe. Stripe is used by 31,412 companies runsonwhat tracks. ### What analytics tools does Base39 use? Base39 uses Google Analytics for analytics, alongside PostHog, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on base39.com.br. Google Analytics is used by 903,920 companies runsonwhat tracks. ### How long has Base39 used Vercel? Base39 has used Vercel since at least August 2023, going by the first public certificate of the base39.com.br subdomain that points at Vercel. Other long-running tools at Base39 include Dub (since October 2024) and Auth0 (since November 2024). ### Does Base39 use Meta Pixel? Yes. runsonwhat found Meta Pixel at Base39 through a DNS verification record for Meta Pixel. Meta Pixel is a Ads & Pixels tool used by 422,475 companies runsonwhat tracks. ### Does Base39 use AI tools? Yes. runsonwhat has found Anthropic at Base39; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Base39 may use more AI tools than these. ### Has Base39 changed tools recently? Yes. On runsonwhat's rechecks, Base39 started using Astro and Clerk (latest on November 7, 2026) and stopped using Framer, Google Fonts and HubSpot (latest on November 7, 2026). A change counts only between two checks of base39.com.br done the same way. ### Which companies have a tech stack similar to Base39's? The companies with the stacks most like Base39's are Superapp, weweb.io, Trayo AI and Rekonnection, according to runsonwhat (November 2026). Each shares 5 to 16 tools with Base39, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Base39 uses? runsonwhat reads public records only. Of the 26 tools at Base39, 16 were found through DNS records, 5 through subdomains that point at the vendor, 4 through code on base39.com.br and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and base39.com.br about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/base39.com.br (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.