# What does Diffco use? Diffco (diffco.us) shows public evidence of 38 tools, according to runsonwhat (last checked 2026-10-07). - Industry: Software - Size: 51–200 employees - Based in: San Jose, United States - Founded: 2008 - LinkedIn: https://www.linkedin.com/company/diffco-us ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Email records, Website code | | | [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Website code | | | [Google Cloud](https://www.runsonwhat.com/reverse/gcp) | Hosting & Cloud | Custom domain | | | [Amazon CloudFront](https://www.runsonwhat.com/reverse/cloudfront) | CDN & Edge | Website code | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code | | | [YouTube](https://www.runsonwhat.com/reverse/youtube) | Media & UI | Website code | | | [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code | | | [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code | | | [OpenAI](https://www.runsonwhat.com/reverse/openai) | AI | DNS verification records | | | [Lottie](https://www.runsonwhat.com/reverse/lottie) | Media & UI | Website code | | | [Stripe](https://www.runsonwhat.com/reverse/stripe) | Payments & Billing | DNS verification records, 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 | | | [Sentry](https://www.runsonwhat.com/reverse/sentry) | Monitoring | Website code | | | [Hotjar](https://www.runsonwhat.com/reverse/hotjar) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code | | | [HubSpot](https://www.runsonwhat.com/reverse/hubspot) | Sales & CRM | Email records, Website code | | | [LinkedIn](https://www.runsonwhat.com/reverse/linkedin) | Marketing | DNS verification records | | | [Apollo.io](https://www.runsonwhat.com/reverse/apollo) | Sales & CRM | Custom domain | 2024-08 | ## 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 | | | [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records, Website code | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | | [Atlassian](https://www.runsonwhat.com/reverse/atlassian) | Dev Tools | DNS verification records | | | [Let's Encrypt](https://www.runsonwhat.com/reverse/letsencrypt) | Security & Compliance | DNS records | | | [Sectigo](https://www.runsonwhat.com/reverse/sectigo) | Security & Compliance | DNS records | | | [DigiCert](https://www.runsonwhat.com/reverse/digicert) | Security & Compliance | DNS records | | | [Google Trust Services](https://www.runsonwhat.com/reverse/google-trust) | Security & Compliance | DNS records | | | [Valimail](https://www.runsonwhat.com/reverse/valimail) | Security & Compliance | Email records | | | [Resend](https://www.runsonwhat.com/reverse/resend) | Email Delivery | Email records | | | [Cloudflare Turnstile](https://www.runsonwhat.com/reverse/turnstile) | Security & Compliance | Website code | | | [Sophos](https://www.runsonwhat.com/reverse/sophos) | Security & Compliance | DNS verification records | | | [Amazon Trust Services](https://www.runsonwhat.com/reverse/amazon-trust) | Security & Compliance | DNS records | | | [Cursor](https://www.runsonwhat.com/reverse/cursor) | Dev Tools | DNS verification records | | | [Notion](https://www.runsonwhat.com/reverse/notion) | Collaboration | DNS verification records | | | [Rippling](https://www.runsonwhat.com/reverse/rippling) | People & HR | DNS verification records | | ## FAQ ### What tools does Diffco use? As of October 2026, runsonwhat has found 38 tools at Diffco (diffco.us) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Google Cloud. Application: Google Fonts, YouTube and React. Data & Observability: Google Analytics, Google Tag Manager and Sentry. Go-to-market: Google Ads, HubSpot and LinkedIn. Company Ops: Microsoft 365, Google Workspace and SendGrid. Last checked October 7, 2026. ### What cloud does Diffco run on? Diffco uses Amazon Web Services for hosting and cloud infrastructure, alongside Google Cloud, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on diffco.us. Amazon Web Services is used by 143,260 companies runsonwhat tracks. ### What CRM does Diffco use? Diffco uses HubSpot for its CRM, alongside Apollo.io, according to runsonwhat (October 2026). runsonwhat found HubSpot through email records that authorize HubSpot and code on diffco.us. HubSpot is used by 87,488 companies runsonwhat tracks. ### What email provider does Diffco use? Diffco uses Microsoft 365 for email and office software, alongside Google Workspace and Apple Business, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 693,090 companies runsonwhat tracks. ### What payment provider does Diffco use? Diffco uses Stripe for payments and billing, according to runsonwhat (October 2026). runsonwhat found Stripe through a DNS verification record for Stripe and code on diffco.us. Stripe is used by 24,174 companies runsonwhat tracks. ### What analytics tools does Diffco use? Diffco uses Google Analytics for analytics, alongside Google Tag Manager and Hotjar, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on diffco.us. Google Analytics is used by 764,514 companies runsonwhat tracks. ### How long has Diffco used Apollo.io? Diffco has used Apollo.io since at least August 2024, going by the first public certificate of the diffco.us subdomain that points at Apollo.io. ### Does Diffco use Google Fonts? Yes. runsonwhat found Google Fonts at Diffco through Google Fonts code on diffco.us. Google Fonts is a Media & UI tool used by 702,207 companies runsonwhat tracks. ### Does Diffco use AI tools? Yes. runsonwhat has found OpenAI at Diffco; OpenAI, for example, through a DNS verification record for OpenAI. AI services called only from servers leave no public trace, so Diffco may use more AI tools than these. ### How does runsonwhat know what Diffco uses? runsonwhat reads public records only. Of the 38 tools at Diffco, 17 were found through DNS records, 13 through code on diffco.us, 5 through email records, 2 through subdomains that point at the vendor and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and diffco.us about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/diffco.us (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.