# What does Sierra Circuits, Inc. use? Sierra Circuits, Inc. (protoexpress.com) shows public evidence of 24 tools, according to runsonwhat (last checked 2026-10-07). - Industry: Consumer Electronics - Size: 201–1,000 employees - Based in: Sunnyvale, United States - Founded: 1986 - LinkedIn: https://www.linkedin.com/company/sierra-circuits-inc ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Website code | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code | | | [Vimeo](https://www.runsonwhat.com/reverse/vimeo) | Media & UI | Website code | | | [YouTube](https://www.runsonwhat.com/reverse/youtube) | Media & UI | Website code | | | [Wistia](https://www.runsonwhat.com/reverse/wistia) | Media & UI | 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 | | | [FullStory](https://www.runsonwhat.com/reverse/fullstory) | Analytics | Website code | | | [Salesforce Personalization](https://www.runsonwhat.com/reverse/salesforce-personalization) | Flags & Experiments | 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 | | | [Salesforce](https://www.runsonwhat.com/reverse/salesforce) | Sales & CRM | Email records, Website code | | | [Marketo](https://www.runsonwhat.com/reverse/marketo) | Marketing | Custom domain, Email records, Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | DNS verification records | | | [reCAPTCHA](https://www.runsonwhat.com/reverse/recaptcha) | Security & Compliance | Website code | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | | [KnowBe4](https://www.runsonwhat.com/reverse/knowbe4) | Security & Compliance | DNS verification records | | | [DocuSign](https://www.runsonwhat.com/reverse/docusign) | Finance & Legal | DNS verification records, Website code | | | [Barracuda](https://www.runsonwhat.com/reverse/barracuda) | Security & Compliance | Email records | | | [hCaptcha](https://www.runsonwhat.com/reverse/hcaptcha) | Security & Compliance | Website code | | ## FAQ ### What tools does Sierra Circuits use? As of October 2026, runsonwhat has found 24 tools at Sierra Circuits (protoexpress.com) in public records. Edge & Hosting: Cloudflare. Application: jQuery, Vimeo and YouTube. Data & Observability: Google Analytics, Google Tag Manager and Sentry. Go-to-market: WordPress, Google Ads and Yoast SEO. Company Ops: Google Workspace, reCAPTCHA and Apple Business. Last checked October 7, 2026. ### What CRM does Sierra Circuits use? Sierra Circuits uses Salesforce for its CRM, according to runsonwhat (October 2026). runsonwhat found Salesforce through email records that authorize Salesforce and code on protoexpress.com. Salesforce is used by 33,624 companies runsonwhat tracks. ### What email provider does Sierra Circuits use? Sierra Circuits uses Google Workspace for email and office software, alongside Apple Business, according to runsonwhat (October 2026). runsonwhat found Google Workspace through a DNS verification record for Google Workspace. Google Workspace is used by 398,966 companies runsonwhat tracks. ### What analytics tools does Sierra Circuits use? Sierra Circuits uses Google Analytics for analytics, alongside Google Tag Manager and FullStory, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on protoexpress.com. Google Analytics is used by 855,926 companies runsonwhat tracks. ### What is Sierra Circuits's website built with? Sierra Circuits uses WordPress for its website, alongside Yoast SEO, according to runsonwhat (October 2026). runsonwhat found WordPress through WordPress code on protoexpress.com. WordPress is used by 584,034 companies runsonwhat tracks. ### What marketing software does Sierra Circuits use? Sierra Circuits uses Marketo for marketing, according to runsonwhat (October 2026). runsonwhat found Marketo through a subdomain that points at Marketo and email records. Marketo is used by 8,752 companies runsonwhat tracks. ### Does Sierra Circuits use jQuery? Yes. runsonwhat found jQuery at Sierra Circuits through jQuery code on protoexpress.com. jQuery is a Frontend tool used by 899,612 companies runsonwhat tracks. ### Which companies have a tech stack similar to Sierra Circuits's? The companies with the stacks most like Sierra Circuits' are Howden, Howden Hellas SA, Faithlife and Marmot, according to runsonwhat (October 2026). Each shares 7 to 9 tools with Sierra Circuits, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Sierra Circuits uses? runsonwhat reads public records only. Of the 24 tools at Sierra Circuits, 16 were found through code on protoexpress.com, 4 through DNS records, 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 protoexpress.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/protoexpress.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.