# What does Stacktrace AI, Inc. use? Stacktrace AI, Inc. (stacktrace.ai) shows public evidence of 12 tools, according to runsonwhat (last checked 2026-11-02). - Industry: Infrastructure - Size: 1–10 employees - Based in: San Francisco, United States ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Website code | | | [Railway](https://www.runsonwhat.com/reverse/railway) | Hosting & Cloud | Custom domain | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | | [Astro](https://www.runsonwhat.com/reverse/astro) | Frontend | Website code | | | [Clerk](https://www.runsonwhat.com/reverse/clerk) | Auth & Identity | Custom domain | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code | | | [PostHog](https://www.runsonwhat.com/reverse/posthog) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Cal.com](https://www.runsonwhat.com/reverse/calcom) | Sales & CRM | Certificate records | 2026-10 | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | ## Recent changes at Stacktrace AI, Inc. - 2026-11-02: started using [Clerk](https://www.runsonwhat.com/reverse/clerk) - 2026-11-02: started using [Google Analytics](https://www.runsonwhat.com/reverse/ga) - 2026-10-29: started using [Cal.com](https://www.runsonwhat.com/reverse/calcom) ## FAQ ### What tools does Stacktrace AI use? As of November 2026, runsonwhat has found 12 tools at Stacktrace AI (stacktrace.ai) in public records. Edge & Hosting: Cloudflare and Railway. Application: Anthropic, Astro and Clerk. Data & Observability: Google Analytics and PostHog. Go-to-market: Cal.com. Company Ops: Google Workspace and Apple Business. Last checked November 2, 2026. ### What cloud does Stacktrace AI run on? Stacktrace AI uses Railway for hosting and cloud infrastructure, according to runsonwhat (November 2026). runsonwhat found Railway through a subdomain that points at Railway. Railway is used by 2,570 companies runsonwhat tracks. ### What sales tools does Stacktrace AI use? The sales tools runsonwhat has found at Stacktrace AI are Cal.com (November 2026); no CRM shows up in Stacktrace AI's public records. runsonwhat found Cal.com through certificate records for Cal.com, in use since at least October 2026. Cal.com is used by 927 companies runsonwhat tracks. ### What email provider does Stacktrace AI use? Stacktrace AI uses Google Workspace for email and office software, alongside Apple Business, according to runsonwhat (November 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace. Google Workspace is used by 412,607 companies runsonwhat tracks. ### What analytics tools does Stacktrace AI use? Stacktrace AI uses Google Analytics for analytics, alongside PostHog, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on stacktrace.ai. Google Analytics is used by 905,967 companies runsonwhat tracks. ### What does Stacktrace AI use for login and identity? Stacktrace AI uses Clerk for sign-in and identity, according to runsonwhat (November 2026). runsonwhat found Clerk through a subdomain that points at Clerk. Clerk is used by 1,416 companies runsonwhat tracks. ### How long has Stacktrace AI used Cal.com? Stacktrace AI has used Cal.com since at least October 2026, going by the first public certificate of the stacktrace.ai subdomain that points at Cal.com. ### Does Stacktrace AI use Cloudflare? Yes. runsonwhat found Cloudflare at Stacktrace AI through DNS records that point at Cloudflare and code on stacktrace.ai. Cloudflare is a CDN & Edge tool used by 726,206 companies runsonwhat tracks. ### Does Stacktrace AI use AI tools? Yes. runsonwhat has found Anthropic at Stacktrace AI; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Stacktrace AI may use more AI tools than these. ### Has Stacktrace AI changed tools recently? Yes. On runsonwhat's rechecks, Stacktrace AI started using Clerk, Google Analytics and Cal.com (latest on November 2, 2026). A change counts only between two checks of stacktrace.ai done the same way. ### Which companies have a tech stack similar to Stacktrace AI's? The companies with the stacks most like Stacktrace AI's are Mochi, Arky Labs, Swaay and act.3, according to runsonwhat (November 2026). Each shares 3 to 5 tools with Stacktrace AI, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Stacktrace AI uses? runsonwhat reads public records only. Of the 12 tools at Stacktrace AI, 4 were found through DNS records, 3 through code on stacktrace.ai, 2 through subdomains that point at the vendor, 1 through email records, 1 through website configuration files and 1 through certificate records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and stacktrace.ai about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/stacktrace.ai (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.