# What does Quantum-Si use? Quantum-Si (quantum-si.com) shows public evidence of 37 tools, according to runsonwhat (last checked 2026-11-04). - Industry: Biotechnology - Size: 51–200 employees - Based in: Branford, United States - Founded: 2013 - LinkedIn: https://www.linkedin.com/company/quantum-si ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Website code | | | [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Website code | | | [Amazon Route 53](https://www.runsonwhat.com/reverse/route53) | DNS | DNS records | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code | | | [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code | | | [Adobe Fonts](https://www.runsonwhat.com/reverse/adobe-fonts) | Media & UI | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | | [OpenAI](https://www.runsonwhat.com/reverse/openai) | AI | DNS verification records | | ## 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 | | | [Hotjar](https://www.runsonwhat.com/reverse/hotjar) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [WordPress](https://www.runsonwhat.com/reverse/wordpress) | Website & CMS | Website code | | | [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code | | | [Yoast SEO](https://www.runsonwhat.com/reverse/yoast) | Website & CMS | Website code | | | [LinkedIn Insight Tag](https://www.runsonwhat.com/reverse/linkedin-insight) | Ads & Pixels | Website code | | | [Microsoft Ads](https://www.runsonwhat.com/reverse/bing-ads) | Ads & Pixels | Website code | | | [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Email records, Website code | | | [Microsoft Xandr](https://www.runsonwhat.com/reverse/xandr) | Ads & Pixels | Website code | | | [Salesforce](https://www.runsonwhat.com/reverse/salesforce) | Sales & CRM | Email records, Website code | | | [Pardot](https://www.runsonwhat.com/reverse/pardot) | Marketing | DNS verification records, Website code | | | [6sense](https://www.runsonwhat.com/reverse/sixsense) | Sales & CRM | Website code | | | [Salesloft](https://www.runsonwhat.com/reverse/salesloft) | Sales & CRM | Custom domain | 2024-10 | | [ConvertFlow](https://www.runsonwhat.com/reverse/convertflow) | Marketing | Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records, Email records, Website code | | | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records | | | [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | | [Cookiebot](https://www.runsonwhat.com/reverse/cookiebot) | Security & Compliance | Website code | | | [Atlassian](https://www.runsonwhat.com/reverse/atlassian) | Dev Tools | DNS verification records | | | [Amazon SES](https://www.runsonwhat.com/reverse/ses) | Email Delivery | Email records, Website code | | | [KnowBe4](https://www.runsonwhat.com/reverse/knowbe4) | Security & Compliance | Email records | | | [DocuSign](https://www.runsonwhat.com/reverse/docusign) | Finance & Legal | DNS verification records, Website code | | | [Zoom](https://www.runsonwhat.com/reverse/zoom) | Collaboration | DNS verification records | | | [dmarcian](https://www.runsonwhat.com/reverse/dmarcian) | Security & Compliance | Email records | | | [Canva](https://www.runsonwhat.com/reverse/canva) | Collaboration | DNS verification records | | | [Zapier](https://www.runsonwhat.com/reverse/zapier) | Dev Tools | DNS verification records | | ## FAQ ### What tools does Quantum-Si use? As of November 2026, runsonwhat has found 37 tools at Quantum-Si (quantum-si.com) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Amazon Route 53. Application: jQuery, Google Fonts and Adobe Fonts. Data & Observability: Google Analytics, Google Tag Manager and Hotjar. Go-to-market: WordPress, Google Ads and Yoast SEO. Company Ops: Microsoft 365, Google Workspace and SendGrid. Last checked November 4, 2026. ### What cloud does Quantum-Si run on? Quantum-Si uses Amazon Web Services for hosting and cloud infrastructure, according to runsonwhat (November 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on quantum-si.com. Amazon Web Services is used by 147,453 companies runsonwhat tracks. ### What CRM does Quantum-Si use? Quantum-Si uses Salesforce for its CRM, alongside 6sense and Salesloft, according to runsonwhat (November 2026). runsonwhat found Salesforce through email records that authorize Salesforce and code on quantum-si.com. Salesforce is used by 35,430 companies runsonwhat tracks. ### What email provider does Quantum-Si use? Quantum-Si 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 and email records. Microsoft 365 is used by 734,122 companies runsonwhat tracks. ### What does Quantum-Si use for customer support? Quantum-Si uses Zendesk for customer support and documentation, according to runsonwhat (November 2026). runsonwhat found Zendesk through email records that authorize Zendesk and code on quantum-si.com. Zendesk is used by 43,646 companies runsonwhat tracks. ### What analytics tools does Quantum-Si use? Quantum-Si uses Google Analytics for analytics, alongside Google Tag Manager and Hotjar, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on quantum-si.com. Google Analytics is used by 903,928 companies runsonwhat tracks. ### How long has Quantum-Si used Salesloft? Quantum-Si has used Salesloft since at least October 2024, going by the first public certificate of the quantum-si.com subdomain that points at Salesloft. ### Does Quantum-Si use jQuery? Yes. runsonwhat found jQuery at Quantum-Si through jQuery code on quantum-si.com. jQuery is a Frontend tool used by 927,220 companies runsonwhat tracks. ### Does Quantum-Si use AI tools? Yes. runsonwhat has found Anthropic and OpenAI at Quantum-Si; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Quantum-Si may use more AI tools than these. ### Which companies have a tech stack similar to Quantum-Si's? The companies with the stacks most like Quantum-Si's are Corning Data, City Cdjrf Of Brookfield, Day.io and Accurate, according to runsonwhat (November 2026). Each shares 14 to 14 tools with Quantum-Si, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Quantum-Si uses? runsonwhat reads public records only. Of the 37 tools at Quantum-Si, 17 were found through code on quantum-si.com, 12 through DNS records, 7 through email records 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 quantum-si.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/quantum-si.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.