# What does Bold use? Bold (boldcf.co) shows public evidence of 22 tools, according to runsonwhat (last checked 2026-10-20). - LinkedIn: https://www.linkedin.com/company/boldteam ## 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 | |---|---|---|---| | [Tailwind CSS](https://www.runsonwhat.com/reverse/tailwind) | Frontend | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | | [Gatsby](https://www.runsonwhat.com/reverse/gatsby) | Frontend | Website code | | | [Stytch](https://www.runsonwhat.com/reverse/stytch) | Auth & Identity | DNS verification records, Website code | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [AppsFlyer](https://www.runsonwhat.com/reverse/appsflyer) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [LinkedIn Insight Tag](https://www.runsonwhat.com/reverse/linkedin-insight) | Ads & Pixels | Website code | | | [Contentful](https://www.runsonwhat.com/reverse/contentful) | Website & CMS | Website code | | ## 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 | | | [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 | | | [Sectigo](https://www.runsonwhat.com/reverse/sectigo) | Security & Compliance | DNS records | | | [KnowBe4](https://www.runsonwhat.com/reverse/knowbe4) | Security & Compliance | DNS verification records | | | [Amazon Trust Services](https://www.runsonwhat.com/reverse/amazon-trust) | Security & Compliance | DNS records | | | [HackerOne](https://www.runsonwhat.com/reverse/hackerone) | Security & Compliance | DNS verification records | | | [Probely](https://www.runsonwhat.com/reverse/probely) | Security & Compliance | DNS verification records | | | [Coda](https://www.runsonwhat.com/reverse/coda) | Collaboration | DNS verification records | | ## FAQ ### What tools does Bold use? As of October 2026, runsonwhat has found 22 tools at Bold (boldcf.co) in public records. Edge & Hosting: Amazon Web Services, Amazon Route 53 and Amazon CloudFront. Application: Tailwind CSS, Anthropic and Gatsby. Data & Observability: AppsFlyer. Go-to-market: LinkedIn Insight Tag and Contentful. Company Ops: Microsoft 365, Google Workspace and SendGrid. Last checked October 20, 2026. ### What cloud does Bold run on? Bold 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 boldcf.co. Amazon Web Services is used by 145,240 companies runsonwhat tracks. ### What email provider does Bold use? Bold 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 706,386 companies runsonwhat tracks. ### What analytics tools does Bold use? Bold uses AppsFlyer for analytics, according to runsonwhat (October 2026). runsonwhat found AppsFlyer through AppsFlyer code on boldcf.co. AppsFlyer is used by 2,861 companies runsonwhat tracks. ### What is Bold's website built with? Bold uses Contentful for its website, according to runsonwhat (October 2026). runsonwhat found Contentful through Contentful code on boldcf.co. Contentful is used by 4,100 companies runsonwhat tracks. ### What does Bold use for login and identity? Bold uses Stytch for sign-in and identity, according to runsonwhat (October 2026). runsonwhat found Stytch through a DNS verification record for Stytch and code on boldcf.co. Stytch is used by 281 companies runsonwhat tracks. ### Does Bold use SendGrid? Yes. runsonwhat found SendGrid at Bold through email records that authorize SendGrid. SendGrid is a Email Delivery tool used by 192,350 companies runsonwhat tracks. ### Does Bold use AI tools? Yes. runsonwhat has found Anthropic at Bold; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Bold may use more AI tools than these. ### Which companies have a tech stack similar to Bold's? The companies with the stacks most like Bold's are Harvey AI, Spring Care, Siemens Healthineers and BioRender, according to runsonwhat (October 2026). Each shares 8 to 12 tools with Bold, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Bold uses? runsonwhat reads public records only. Of the 22 tools at Bold, 12 were found through DNS records, 7 through code on boldcf.co and 3 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and boldcf.co about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/boldcf.co (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.