# What does Flex use? Flex (flex.team) shows public evidence of 25 tools, according to runsonwhat (last checked 2026-10-07). - Industry: IT Services - Size: 51–200 employees - Based in: Seoul, South Korea - LinkedIn: https://www.linkedin.com/company/flexteamofficial ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [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 | | | [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | 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 | | | [Sentry](https://www.runsonwhat.com/reverse/sentry) | Monitoring | Website code | | | [Naver Analytics](https://www.runsonwhat.com/reverse/naver-analytics) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code | | | [Meta Pixel](https://www.runsonwhat.com/reverse/meta-pixel) | Ads & Pixels | DNS verification records | | | [Ahrefs](https://www.runsonwhat.com/reverse/ahrefs) | Marketing | DNS verification records | | | [Intercom](https://www.runsonwhat.com/reverse/intercom) | Support & Docs | Website code | | | [ReadMe](https://www.runsonwhat.com/reverse/readme) | Support & Docs | Custom domain | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records | | | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records, Website code | | | [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records | | | [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 | | | [Mailgun](https://www.runsonwhat.com/reverse/mailgun) | Email Delivery | Email records, Website code | | | [JetBrains](https://www.runsonwhat.com/reverse/jetbrains) | Dev Tools | DNS verification records | | | [HashiCorp Cloud](https://www.runsonwhat.com/reverse/hashicorp) | Dev Tools | DNS verification records | | ## FAQ ### What tools does Flex use? As of October 2026, runsonwhat has found 25 tools at Flex (flex.team) in public records. Edge & Hosting: Amazon Web Services, Amazon Route 53 and Amazon CloudFront. Application: React, Next.js and Anthropic. Data & Observability: Google Analytics, Google Tag Manager and Sentry. Go-to-market: Google Ads, Meta Pixel and Ahrefs. Company Ops: Microsoft 365, Google Workspace and SendGrid. Last checked October 7, 2026. ### What cloud does Flex run on? Flex uses Amazon Web Services for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on flex.team. Amazon Web Services is used by 144,878 companies runsonwhat tracks. ### What email provider does Flex use? Flex uses Microsoft 365 for email and office software, alongside Google Workspace, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 701,710 companies runsonwhat tracks. ### What does Flex use for customer support? Flex uses Intercom for customer support and documentation, alongside ReadMe, according to runsonwhat (October 2026). runsonwhat found Intercom through Intercom code on flex.team. Intercom is used by 8,373 companies runsonwhat tracks. ### What analytics tools does Flex use? Flex uses Google Analytics for analytics, alongside Google Tag Manager and Naver Analytics, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on flex.team. Google Analytics is used by 853,379 companies runsonwhat tracks. ### What marketing software does Flex use? Flex uses Ahrefs for marketing, according to runsonwhat (October 2026). runsonwhat found Ahrefs through a DNS verification record for Ahrefs. Ahrefs is used by 22,994 companies runsonwhat tracks. ### Does Flex use Google Ads? Yes. runsonwhat found Google Ads at Flex through Google Ads code on flex.team. Google Ads is a Ads & Pixels tool used by 461,054 companies runsonwhat tracks. ### Does Flex use AI tools? Yes. runsonwhat has found Anthropic and OpenAI at Flex; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Flex may use more AI tools than these. ### Which companies have a tech stack similar to Flex's? The companies with the stacks most like Flex's are Opslevel, CM.com, Fat Zebra and Apostra, according to runsonwhat (October 2026). Each shares 11 to 13 tools with Flex, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Flex uses? runsonwhat reads public records only. Of the 25 tools at Flex, 10 were found through code on flex.team, 10 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 flex.team about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/flex.team (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.