# What does OpenWork use? OpenWork (openworklabs.com) shows public evidence of 17 tools, according to runsonwhat (last checked 2026-10-09). - Industry: Productivity - 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 | | | [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 | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | Subprocessor list | | | [OpenAI](https://www.runsonwhat.com/reverse/openai) | AI | Subprocessor list | | | [MCP Registry](https://www.runsonwhat.com/reverse/mcp-registry) | AI | DNS verification records | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [PostHog](https://www.runsonwhat.com/reverse/posthog) | Analytics | Website code, Subprocessor list | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Plain](https://www.runsonwhat.com/reverse/plain) | Support & Docs | DNS verification records | | ## 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, Subprocessor list | | | [Resend](https://www.runsonwhat.com/reverse/resend) | Email Delivery | Email records | | | [GitHub](https://www.runsonwhat.com/reverse/github) | Dev Tools | Subprocessor list | | | [Comp AI](https://www.runsonwhat.com/reverse/comp-ai) | Security & Compliance | DNS verification records | | ## Recent changes at OpenWork - 2026-10-09: started using [MCP Registry](https://www.runsonwhat.com/reverse/mcp-registry) ## FAQ ### What tools does OpenWork use? As of October 2026, runsonwhat has found 17 tools at OpenWork (openworklabs.com) in public records. Edge & Hosting: Cloudflare and Vercel. Application: React, Tailwind CSS and Next.js. Data & Observability: PostHog. Go-to-market: Plain. Company Ops: Microsoft 365, Google Workspace and Resend. Last checked October 9, 2026. ### What cloud does OpenWork run on? OpenWork uses Vercel for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Vercel through a subdomain that points at Vercel and a DNS verification record. Vercel is used by 46,321 companies runsonwhat tracks. ### What email provider does OpenWork use? OpenWork 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 700,596 companies runsonwhat tracks. ### What does OpenWork use for customer support? OpenWork uses Plain for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Plain through a DNS verification record for Plain. Plain is used by 72 companies runsonwhat tracks. ### What analytics tools does OpenWork use? OpenWork uses PostHog for analytics, according to runsonwhat (October 2026). runsonwhat found PostHog through PostHog code on openworklabs.com and its subprocessor list. PostHog is used by 9,337 companies runsonwhat tracks. ### Does OpenWork use Cloudflare? Yes. runsonwhat found Cloudflare at OpenWork through DNS records that point at Cloudflare and code on openworklabs.com. Cloudflare is a CDN & Edge tool used by 691,534 companies runsonwhat tracks. ### Does OpenWork use AI tools? Yes. runsonwhat has found Anthropic, OpenAI and MCP Registry at OpenWork; Anthropic, for example, through Anthropic on openworklabs.com's subprocessor list. AI services called only from servers leave no public trace, so OpenWork may use more AI tools than these. ### Has OpenWork changed tools recently? Yes. On runsonwhat's rechecks, OpenWork started using MCP Registry (latest on October 9, 2026). A change counts only between two checks of openworklabs.com done the same way. ### Which companies have a tech stack similar to OpenWork's? The companies with the stacks most like OpenWork's are Dailybot, OnePatch, Context Dev and Vercel, according to runsonwhat (October 2026). Each shares 8 to 10 tools with OpenWork, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what OpenWork uses? runsonwhat reads public records only. Of the 17 tools at OpenWork, 6 were found through DNS records, 4 through code on openworklabs.com, 3 through its own subprocessor list, 2 through email records, 1 through website configuration files and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and openworklabs.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/openworklabs.com (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.