# What does Zero use? Zero (zero.inc) shows public evidence of 37 tools, according to runsonwhat (last checked 2026-10-25). ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | Custom domain, DNS records, Website code, Subprocessor list | 2024-09 | | [Namecheap](https://www.runsonwhat.com/reverse/namecheap) | DNS | DNS records | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records, Subprocessor list | | | [OpenAI](https://www.runsonwhat.com/reverse/openai) | AI | Subprocessor list | | | [Stripe](https://www.runsonwhat.com/reverse/stripe) | Payments & Billing | Subprocessor list | | | [Cloudinary](https://www.runsonwhat.com/reverse/cloudinary) | Media & UI | Subprocessor list | | | [MongoDB Atlas](https://www.runsonwhat.com/reverse/mongodb) | Backend & Database | Subprocessor list | | | [Rive](https://www.runsonwhat.com/reverse/rive) | Media & UI | Website code | | | [Google Gemini](https://www.runsonwhat.com/reverse/gemini) | AI | Subprocessor list | | | [Langfuse](https://www.runsonwhat.com/reverse/langfuse) | AI | Subprocessor list | | ## 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 | | | [Sentry](https://www.runsonwhat.com/reverse/sentry) | Monitoring | Subprocessor list | | | [web-vitals](https://www.runsonwhat.com/reverse/web-vitals) | Monitoring | Website code | | | [PostHog](https://www.runsonwhat.com/reverse/posthog) | Analytics | Website code, Subprocessor list | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | 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 | Subprocessor list | | | [Reddit Ads](https://www.runsonwhat.com/reverse/reddit-ads) | Ads & Pixels | Website code | | | [GitBook](https://www.runsonwhat.com/reverse/gitbook) | Support & Docs | Custom domain | 2025-07 | | [Cal.com](https://www.runsonwhat.com/reverse/calcom) | Sales & CRM | Website code | | | [Pipedrive](https://www.runsonwhat.com/reverse/pipedrive) | Sales & CRM | Subprocessor list | | | [Attio](https://www.runsonwhat.com/reverse/attio) | Sales & CRM | Subprocessor list | | | [Loops](https://www.runsonwhat.com/reverse/loops) | Marketing | Subprocessor list | | | [Monaco](https://www.runsonwhat.com/reverse/monaco-sales) | Sales & CRM | Subprocessor list | | ## 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 | | | [Resend](https://www.runsonwhat.com/reverse/resend) | Email Delivery | Email records | | | [Slack](https://www.runsonwhat.com/reverse/slack) | Collaboration | Subprocessor list | | | [Notion](https://www.runsonwhat.com/reverse/notion) | Collaboration | Subprocessor list | | | [HubSpot App Developer](https://www.runsonwhat.com/reverse/hubspot-developer) | Dev Tools | DNS verification records | | | [Linear](https://www.runsonwhat.com/reverse/linear) | Dev Tools | Subprocessor list | | | [Oneleet](https://www.runsonwhat.com/reverse/oneleet) | Security & Compliance | Custom domain, DNS verification records | 2026-08 | | [GitHub](https://www.runsonwhat.com/reverse/github) | Dev Tools | Subprocessor list | | ## FAQ ### What tools does Zero use? As of October 2026, runsonwhat has found 37 tools at Zero (zero.inc) in public records. Edge & Hosting: Vercel and Namecheap. Application: Next.js, Anthropic and OpenAI. Data & Observability: Google Analytics, Google Tag Manager and Sentry. Go-to-market: Google Ads, LinkedIn Insight Tag and HubSpot. Company Ops: Microsoft 365, Google Workspace and Resend. Last checked October 25, 2026. ### What cloud does Zero run on? Zero uses Vercel for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Vercel through a subdomain that points at Vercel and DNS records, and Zero has used it since at least September 2024. Vercel is used by 49,762 companies runsonwhat tracks. ### What CRM does Zero use? Zero uses HubSpot for its CRM, alongside Pipedrive, Attio and Cal.com, according to runsonwhat (October 2026). runsonwhat found HubSpot through HubSpot on zero.inc's subprocessor list. HubSpot is used by 95,252 companies runsonwhat tracks. ### What email provider does Zero use? Zero 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 715,423 companies runsonwhat tracks. ### What does Zero use for customer support? Zero uses GitBook for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found GitBook through a subdomain that points at GitBook, and Zero has used it since at least July 2025. GitBook is used by 2,033 companies runsonwhat tracks. ### What payment provider does Zero use? Zero uses Stripe for payments and billing, according to runsonwhat (October 2026). runsonwhat found Stripe through Stripe on zero.inc's subprocessor list. Stripe is used by 30,151 companies runsonwhat tracks. ### How long has Zero used Vercel? Zero has used Vercel since at least September 2024, going by the first public certificate of the zero.inc subdomain that points at Vercel. Other long-running tools at Zero include GitBook (since July 2025) and Oneleet (since August 2026). ### Does Zero use Google Ads? Yes. runsonwhat found Google Ads at Zero through Google Ads code on zero.inc. Google Ads is a Ads & Pixels tool used by 529,510 companies runsonwhat tracks. ### Does Zero use AI tools? Yes. runsonwhat has found Anthropic, OpenAI, Google Gemini and Langfuse at Zero; Anthropic, for example, through a DNS verification record for Anthropic and its subprocessor list. AI services called only from servers leave no public trace, so Zero may use more AI tools than these. ### Which companies have a tech stack similar to Zero's? The companies with the stacks most like Zero's are Superagent, SAGARIS, IMMERSE and Clawvisor, according to runsonwhat (October 2026). Each shares 11 to 16 tools with Zero, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Zero uses? runsonwhat reads public records only. Of the 37 tools at Zero, 16 were found through its own subprocessor list, 10 through code on zero.inc, 5 through DNS records, 3 through subdomains that point at the vendor, 2 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 zero.inc about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/zero.inc (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.