# What does Antithesis use? Antithesis (antithesis.com) shows public evidence of 22 tools, according to runsonwhat (last checked 2026-11-06). - Industry: Software - Size: 11–50 employees - Based in: Tysons, United States - LinkedIn: https://www.linkedin.com/company/antithesis-operations ## 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 | | | [Amazon CloudFront](https://www.runsonwhat.com/reverse/cloudfront) | CDN & Edge | Website code | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code | | | [Tailwind CSS](https://www.runsonwhat.com/reverse/tailwind) | Frontend | Website code | | | [Astro](https://www.runsonwhat.com/reverse/astro) | Frontend | Website code | | | [MCP Registry](https://www.runsonwhat.com/reverse/mcp-registry) | AI | DNS verification records | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Tag Manager](https://www.runsonwhat.com/reverse/gtm) | Analytics | Website code | | | [PostHog](https://www.runsonwhat.com/reverse/posthog) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [LinkedIn Insight Tag](https://www.runsonwhat.com/reverse/linkedin-insight) | Ads & Pixels | Website code | | | [Salesforce](https://www.runsonwhat.com/reverse/salesforce) | Sales & CRM | Email records, Website code | | | [X Ads](https://www.runsonwhat.com/reverse/x-ads) | Ads & Pixels | Website code | | | [Marketo](https://www.runsonwhat.com/reverse/marketo) | Marketing | Email records, Website code | | | [Discord](https://www.runsonwhat.com/reverse/discord) | Support & Docs | Website code | | | [Reo.dev](https://www.runsonwhat.com/reverse/reo) | Sales & CRM | Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records, Website code | | | [Mailchimp Transactional](https://www.runsonwhat.com/reverse/mandrill) | Email Delivery | Email records | | | [Usercentrics](https://www.runsonwhat.com/reverse/usercentrics) | Security & Compliance | Website code | | | [Rippling](https://www.runsonwhat.com/reverse/rippling) | People & HR | DNS verification records | | | [Vanta](https://www.runsonwhat.com/reverse/vanta) | Security & Compliance | Custom domain | | ## Recent changes at Antithesis - 2026-11-06: started using [MCP Registry](https://www.runsonwhat.com/reverse/mcp-registry) ## Hiring at Antithesis 22 open roles on its public job board: Sales 10, Engineering 7, Customer Success 1, Data & AI 1, Finance & Legal 1, Marketing 1. ## FAQ ### What tools does Antithesis use? As of November 2026, runsonwhat has found 22 tools at Antithesis (antithesis.com) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Amazon Route 53. Application: React, Tailwind CSS and Astro. Data & Observability: Google Tag Manager and PostHog. Go-to-market: LinkedIn Insight Tag, Salesforce and X Ads. Company Ops: Google Workspace, Mailchimp Transactional and Usercentrics. Last checked November 6, 2026. ### What cloud does Antithesis run on? Antithesis 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 antithesis.com. Amazon Web Services is used by 147,481 companies runsonwhat tracks. ### What CRM does Antithesis use? Antithesis uses Salesforce for its CRM, alongside Reo.dev, according to runsonwhat (November 2026). runsonwhat found Salesforce through email records that authorize Salesforce and code on antithesis.com. Salesforce is used by 35,435 companies runsonwhat tracks. ### What email provider does Antithesis use? Antithesis uses Google Workspace for email and office software, according to runsonwhat (November 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace and code on antithesis.com. Google Workspace is used by 420,124 companies runsonwhat tracks. ### What does Antithesis use for customer support? Antithesis uses Discord for customer support and documentation, according to runsonwhat (November 2026). runsonwhat found Discord through Discord code on antithesis.com. Discord is used by 7,050 companies runsonwhat tracks. ### What analytics tools does Antithesis use? Antithesis uses Google Tag Manager for analytics, alongside PostHog, according to runsonwhat (November 2026). runsonwhat found Google Tag Manager through Google Tag Manager code on antithesis.com. Google Tag Manager is used by 516,109 companies runsonwhat tracks. ### Does Antithesis use Cloudflare? Yes. runsonwhat found Cloudflare at Antithesis through Cloudflare code on antithesis.com. Cloudflare is a CDN & Edge tool used by 733,385 companies runsonwhat tracks. ### Does Antithesis use AI tools? Yes. runsonwhat has found MCP Registry at Antithesis; MCP Registry, for example, through a DNS verification record for MCP Registry. AI services called only from servers leave no public trace, so Antithesis may use more AI tools than these. ### Is Antithesis hiring? Yes. As of November 2026, Antithesis has 22 open roles on its public Ashby job board, most in sales (10), engineering (7) and customer success (1). 4 were posted in the last 30 days and 11 were taken down. ### Has Antithesis changed tools recently? Yes. On runsonwhat's rechecks, Antithesis started using MCP Registry (latest on November 6, 2026). A change counts only between two checks of antithesis.com done the same way. ### Which companies have a tech stack similar to Antithesis's? The companies with the stacks most like Antithesis' are DataHub, Union.ai, MedusaJS and Ultralytics, according to runsonwhat (November 2026). Each shares 8 to 11 tools with Antithesis, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Antithesis uses? runsonwhat reads public records only. Of the 22 tools at Antithesis, 13 were found through code on antithesis.com, 4 through DNS records, 4 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 antithesis.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/antithesis.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.