What does HackerOne use?

As of October 2026, runsonwhat has found 56 tools at HackerOne (hackerone.com) in public records. Edge & Hosting: Cloudflare, Fastly and Pantheon. Application: jQuery, Font Awesome and Tailwind CSS. Data & Observability: Google Analytics, Google Tag Manager and Sentry. Go-to-market: Google Ads, Meta Pixel and Microsoft Ads. Company Ops: Microsoft 365, Google Workspace and SendGrid. Last checked October 4, 2026.

HackerOne uses Pantheon for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Pantheon through Pantheon code on hackerone.com. Pantheon is used by 4,298 companies runsonwhat tracks.

The sales tools runsonwhat has found at HackerOne are ZoomInfo, 6sense, Qualified and TechTarget (October 2026); no CRM shows up in HackerOne's public records. runsonwhat found ZoomInfo through ZoomInfo code on hackerone.com.

HackerOne uses Microsoft 365 for email and office software, alongside Google Workspace, Apple Business and Proton Mail, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 694,518 companies runsonwhat tracks.

HackerOne uses Zendesk for customer support and documentation, alongside Freshdesk, Intercom and Drift, according to runsonwhat (October 2026). runsonwhat found Zendesk through email records that authorize Zendesk. Zendesk is used by 40,048 companies runsonwhat tracks.

HackerOne uses PayPal for payments and billing, alongside Stripe, according to runsonwhat (October 2026). runsonwhat found PayPal through PayPal code on hackerone.com. PayPal is used by 33,345 companies runsonwhat tracks.

HackerOne has used Freshdesk since at least July 2015, going by the first public certificate of the hackerone.com subdomain that points at Freshdesk.

Yes. runsonwhat found jQuery at HackerOne through jQuery code on hackerone.com. jQuery is a Frontend tool used by 854,173 companies runsonwhat tracks.

Yes. runsonwhat has found Anthropic and OpenAI at HackerOne; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so HackerOne may use more AI tools than these.

The companies with the stacks most like HackerOne's are Zscaler, Klaviyo, Mitek and Manhattan Associates, according to runsonwhat (October 2026). Each shares 21 to 32 tools with HackerOne, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

runsonwhat reads public records only. Of the 56 tools at HackerOne, 26 were found through DNS records, 22 through code on hackerone.com, 7 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 hackerone.com about monthly.