# What does Sieve use? Sieve (sievedata.com) shows public evidence of 20 tools, according to runsonwhat (last checked 2026-10-09). - Industry: Infrastructure - Size: 11–50 employees - Based in: San Francisco, United States - Founded: 2022 - LinkedIn: https://www.linkedin.com/company/sievedata ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records | | | [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | Custom domain, DNS verification records, DNS records, Website code | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | | [Auth0](https://www.runsonwhat.com/reverse/auth0) | Auth & Identity | Custom domain | | ## 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 | | | [web-vitals](https://www.runsonwhat.com/reverse/web-vitals) | Monitoring | Website code | | | [PostHog](https://www.runsonwhat.com/reverse/posthog) | Analytics | Website code | | | [Vercel Analytics](https://www.runsonwhat.com/reverse/vercel-analytics) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Mailchimp](https://www.runsonwhat.com/reverse/mailchimp) | Marketing | Email records | | | [Apollo.io](https://www.runsonwhat.com/reverse/apollo) | Sales & CRM | Custom domain | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records | | | [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records | | | [Mailgun](https://www.runsonwhat.com/reverse/mailgun) | Email Delivery | Email records | | | [Resend](https://www.runsonwhat.com/reverse/resend) | Email Delivery | Email records | | | [Notion](https://www.runsonwhat.com/reverse/notion) | Collaboration | DNS verification records | | ## FAQ ### What tools does Sieve use? As of October 2026, runsonwhat has found 20 tools at Sieve (sievedata.com) in public records. Edge & Hosting: Cloudflare and Vercel. Application: Next.js, Anthropic and Auth0. Data & Observability: Google Analytics, Google Tag Manager and Sentry. Go-to-market: Mailchimp and Apollo.io. Company Ops: Google Workspace, SendGrid and Mailgun. Last checked October 9, 2026. ### What cloud does Sieve run on? Sieve 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 46,658 companies runsonwhat tracks. ### What sales tools does Sieve use? The sales tools runsonwhat has found at Sieve are Apollo.io (October 2026); no CRM shows up in Sieve's public records. runsonwhat found Apollo.io through a subdomain that points at Apollo.io. Apollo.io is used by 10,801 companies runsonwhat tracks. ### What email provider does Sieve use? Sieve uses Google Workspace for email and office software, according to runsonwhat (October 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace. Google Workspace is used by 397,574 companies runsonwhat tracks. ### What analytics tools does Sieve use? Sieve uses Google Analytics for analytics, alongside Google Tag Manager, PostHog and Vercel Analytics, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on sievedata.com. Google Analytics is used by 853,379 companies runsonwhat tracks. ### What marketing software does Sieve use? Sieve uses Mailchimp for marketing, according to runsonwhat (October 2026). runsonwhat found Mailchimp through email records that authorize Mailchimp. Mailchimp is used by 113,225 companies runsonwhat tracks. ### Does Sieve use Cloudflare? Yes. runsonwhat found Cloudflare at Sieve through DNS records that point at Cloudflare. Cloudflare is a CDN & Edge tool used by 692,707 companies runsonwhat tracks. ### Does Sieve use AI tools? Yes. runsonwhat has found Anthropic at Sieve; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Sieve may use more AI tools than these. ### Which companies have a tech stack similar to Sieve's? The companies with the stacks most like Sieve's are Spokn, SINAI Technologies, Semble and Flowspace, according to runsonwhat (October 2026). Each shares 5 to 8 tools with Sieve, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Sieve uses? runsonwhat reads public records only. Of the 20 tools at Sieve, 7 were found through code on sievedata.com, 5 through email records, 4 through DNS records, 3 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 sievedata.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/sievedata.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.