# What does Diffchecker use? Diffchecker (diffchecker.com) shows public evidence of 17 tools, according to runsonwhat (last checked 2026-10-31). ## 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 | DNS verification records | | | [Render](https://www.runsonwhat.com/reverse/render) | Hosting & Cloud | Custom domain | 2026-07 | ## 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 | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code | | | [Sentry](https://www.runsonwhat.com/reverse/sentry) | Monitoring | Website code | | | [Mixpanel](https://www.runsonwhat.com/reverse/mixpanel) | Analytics | Website code | | | [Better Stack](https://www.runsonwhat.com/reverse/betterstack) | Monitoring | Custom domain | 2026-06 | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Mailchimp](https://www.runsonwhat.com/reverse/mailchimp) | Marketing | Email records | | | [MailerLite](https://www.runsonwhat.com/reverse/mailerlite) | Marketing | DNS verification records, Email 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, Website code | | | [SparkPost](https://www.runsonwhat.com/reverse/sparkpost) | Email Delivery | Email records, Website code | | | [Vanta](https://www.runsonwhat.com/reverse/vanta) | Security & Compliance | Custom domain | 2026-08 | ## FAQ ### What tools does Diffchecker use? As of November 2026, runsonwhat has found 17 tools at Diffchecker (diffchecker.com) in public records. Edge & Hosting: Cloudflare, Vercel and Render. Application: React, Tailwind CSS and Next.js. Data & Observability: Google Analytics, Sentry and Mixpanel. Go-to-market: Mailchimp and MailerLite. Company Ops: Microsoft 365, Google Workspace and SparkPost. Last checked October 31, 2026. ### What cloud does Diffchecker run on? Diffchecker uses Vercel for hosting and cloud infrastructure, alongside Render, according to runsonwhat (November 2026). runsonwhat found Vercel through a DNS verification record for Vercel. Vercel is used by 51,154 companies runsonwhat tracks. ### What email provider does Diffchecker use? Diffchecker uses Microsoft 365 for email and office software, alongside Google Workspace, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 719,672 companies runsonwhat tracks. ### What analytics tools does Diffchecker use? Diffchecker uses Google Analytics for analytics, alongside Mixpanel, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on diffchecker.com. Google Analytics is used by 906,173 companies runsonwhat tracks. ### What marketing software does Diffchecker use? Diffchecker uses Mailchimp for marketing, alongside MailerLite, according to runsonwhat (November 2026). runsonwhat found Mailchimp through email records that authorize Mailchimp. Mailchimp is used by 117,776 companies runsonwhat tracks. ### What monitoring tools does Diffchecker use? Diffchecker uses Sentry for monitoring, alongside Better Stack, according to runsonwhat (November 2026). runsonwhat found Sentry through Sentry code on diffchecker.com. Sentry is used by 80,056 companies runsonwhat tracks. ### How long has Diffchecker used Better Stack? Diffchecker has used Better Stack since at least June 2026, going by the first public certificate of the diffchecker.com subdomain that points at Better Stack. Other long-running tools at Diffchecker include Render (since July 2026) and Vanta (since August 2026). ### Does Diffchecker use Cloudflare? Yes. runsonwhat found Cloudflare at Diffchecker through DNS records that point at Cloudflare and code on diffchecker.com. Cloudflare is a CDN & Edge tool used by 724,934 companies runsonwhat tracks. ### Which companies have a tech stack similar to Diffchecker's? The companies with the stacks most like Diffchecker's are Quantum Analytics, Rts Reliable Tax Service, Sigod and Rojkind Inmobiliaria, SA de CV, according to runsonwhat (November 2026). Each shares 3 to 9 tools with Diffchecker, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Diffchecker uses? runsonwhat reads public records only. Of the 17 tools at Diffchecker, 6 were found through code on diffchecker.com, 5 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 diffchecker.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/diffchecker.com (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.