# What does Checkr use? Checkr (checkr.com) shows public evidence of 79 tools, according to runsonwhat (last checked 2026-10-18). - Industry: Human Resources - Size: 201–1,000 employees - Based in: San Francisco, United States - LinkedIn: https://www.linkedin.com/company/checkr-com ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS verification records, DNS records, Website code | | | [Netlify](https://www.runsonwhat.com/reverse/netlify) | Hosting & Cloud | Custom domain, Website code | 2026-06 | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code | | | [Vimeo](https://www.runsonwhat.com/reverse/vimeo) | Media & UI | Website code | | | [YouTube](https://www.runsonwhat.com/reverse/youtube) | Media & UI | Website code | | | [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code | | | [Tailwind CSS](https://www.runsonwhat.com/reverse/tailwind) | 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 | | | [Lottie](https://www.runsonwhat.com/reverse/lottie) | Media & UI | Website code | | | [Stripe](https://www.runsonwhat.com/reverse/stripe) | Payments & Billing | DNS verification records, Website code | | | [Wistia](https://www.runsonwhat.com/reverse/wistia) | Media & UI | Website code | | | [Auth0](https://www.runsonwhat.com/reverse/auth0) | Auth & Identity | Custom domain | 2019-01 | | [Twilio](https://www.runsonwhat.com/reverse/twilio) | Backend & Database | DNS verification records | | | [MongoDB Atlas](https://www.runsonwhat.com/reverse/mongodb) | Backend & Database | 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 | | | [Datadog](https://www.runsonwhat.com/reverse/datadog) | Monitoring | Website code | | | [VWO](https://www.runsonwhat.com/reverse/vwo) | Flags & Experiments | Website code | | | [Atlassian Statuspage](https://www.runsonwhat.com/reverse/statuspage) | Monitoring | DNS verification records, Website code | | | [Amplitude](https://www.runsonwhat.com/reverse/amplitude) | Analytics | Website code | | | [HockeyStack](https://www.runsonwhat.com/reverse/hockeystack) | 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, Website code | | | [Microsoft Ads](https://www.runsonwhat.com/reverse/bing-ads) | Ads & Pixels | Website code | | | [LinkedIn Insight Tag](https://www.runsonwhat.com/reverse/linkedin-insight) | Ads & Pixels | Website code | | | [HubSpot](https://www.runsonwhat.com/reverse/hubspot) | Sales & CRM | DNS verification records, Email records, Website code | | | [Brevo](https://www.runsonwhat.com/reverse/brevo) | Marketing | DNS verification records | | | [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Email records | | | [Microsoft Xandr](https://www.runsonwhat.com/reverse/xandr) | Ads & Pixels | Website code | | | [Salesforce](https://www.runsonwhat.com/reverse/salesforce) | Sales & CRM | Custom domain | 2018-01 | | [Squarespace](https://www.runsonwhat.com/reverse/squarespace) | Website & CMS | DNS records | | | [Ahrefs](https://www.runsonwhat.com/reverse/ahrefs) | Marketing | DNS verification records | | | [ChatGPT Ads](https://www.runsonwhat.com/reverse/chatgpt-ads) | Ads & Pixels | Website code | | | [LiveRamp](https://www.runsonwhat.com/reverse/liveramp) | Ads & Pixels | Website code | | | [Reddit Ads](https://www.runsonwhat.com/reverse/reddit-ads) | Ads & Pixels | Website code | | | [ZoomInfo](https://www.runsonwhat.com/reverse/zoominfo) | Sales & CRM | Website code | | | [Demandbase](https://www.runsonwhat.com/reverse/demandbase) | Sales & CRM | Website code | | | [Marketo](https://www.runsonwhat.com/reverse/marketo) | Marketing | Custom domain, Website code | 2017-10 | | [Intercom](https://www.runsonwhat.com/reverse/intercom) | Support & Docs | Email records | | | [Weglot](https://www.runsonwhat.com/reverse/weglot) | Website & CMS | Website code | | | [MNTN](https://www.runsonwhat.com/reverse/mntn) | Ads & Pixels | Website code | | | [6sense](https://www.runsonwhat.com/reverse/sixsense) | Sales & CRM | Website code | | | [RB2B](https://www.runsonwhat.com/reverse/rb2b) | Sales & CRM | Website code | | | [Storyblok](https://www.runsonwhat.com/reverse/storyblok) | Website & CMS | Website code | | | [Quora Ads](https://www.runsonwhat.com/reverse/quora-ads) | Ads & Pixels | Website code | | | [Qualified](https://www.runsonwhat.com/reverse/qualified) | Sales & CRM | Website code | | | [Drift](https://www.runsonwhat.com/reverse/drift) | Support & Docs | DNS verification records | | | [impact.com](https://www.runsonwhat.com/reverse/impact-com) | Marketing | Website code | | | [Navattic](https://www.runsonwhat.com/reverse/navattic) | Marketing | Website code | | | [PartnerStack](https://www.runsonwhat.com/reverse/partnerstack) | Marketing | Custom domain | 2026-04 | | [Influ2](https://www.runsonwhat.com/reverse/influ2) | Ads & Pixels | Website code | | | [AcuityAds](https://www.runsonwhat.com/reverse/acuityads) | Ads & Pixels | Website code | | | [Decagon](https://www.runsonwhat.com/reverse/decagon) | Support & Docs | DNS verification records | | | [LaunchNotes](https://www.runsonwhat.com/reverse/launchnotes) | Marketing | Custom domain | 2023-08 | ## 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 | | | [reCAPTCHA](https://www.runsonwhat.com/reverse/recaptcha) | Security & Compliance | Website code | | | [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | | [Atlassian](https://www.runsonwhat.com/reverse/atlassian) | Dev Tools | DNS verification records | | | [Mailchimp Transactional](https://www.runsonwhat.com/reverse/mandrill) | Email Delivery | DNS verification records, Email records | | | [GlobalSign](https://www.runsonwhat.com/reverse/globalsign) | Security & Compliance | DNS verification records | | | [Proofpoint](https://www.runsonwhat.com/reverse/proofpoint) | Security & Compliance | Email records | | | [OneTrust](https://www.runsonwhat.com/reverse/onetrust) | Security & Compliance | Website code | | | [Resend](https://www.runsonwhat.com/reverse/resend) | Email Delivery | Email records | | | [Cloudflare Turnstile](https://www.runsonwhat.com/reverse/turnstile) | Security & Compliance | Website code | | | [Mailjet](https://www.runsonwhat.com/reverse/mailjet) | Email Delivery | Email records | | | [Miro](https://www.runsonwhat.com/reverse/miro) | Collaboration | DNS verification records | | | [hCaptcha](https://www.runsonwhat.com/reverse/hcaptcha) | Security & Compliance | Website code | | | [Cursor](https://www.runsonwhat.com/reverse/cursor) | Dev Tools | DNS verification records | | | [GoTo](https://www.runsonwhat.com/reverse/goto) | Collaboration | DNS verification records | | | [Docker](https://www.runsonwhat.com/reverse/docker) | Dev Tools | DNS verification records | | | [Zapier](https://www.runsonwhat.com/reverse/zapier) | Dev Tools | DNS verification records | | | [HashiCorp Cloud](https://www.runsonwhat.com/reverse/hashicorp) | Dev Tools | DNS verification records | | | [Parallels](https://www.runsonwhat.com/reverse/parallels) | Dev Tools | DNS verification records | | | [Keybase](https://www.runsonwhat.com/reverse/keybase) | Security & Compliance | DNS verification records, Website code | | ## Recent changes at Checkr - 2026-10-18: started using [Twilio](https://www.runsonwhat.com/reverse/twilio) ## FAQ ### What tools does Checkr use? As of October 2026, runsonwhat has found 79 tools at Checkr (checkr.com) in public records. Edge & Hosting: Cloudflare and Netlify. Application: jQuery, Vimeo and YouTube. 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 reCAPTCHA. Last checked October 18, 2026. ### What cloud does Checkr run on? Checkr uses Netlify for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Netlify through a subdomain that points at Netlify and code on checkr.com, and Checkr has used it since at least June 2026. Netlify is used by 11,119 companies runsonwhat tracks. ### What CRM does Checkr use? Checkr uses HubSpot for its CRM, alongside Salesforce, ZoomInfo and Demandbase, according to runsonwhat (October 2026). runsonwhat found HubSpot through a DNS verification record for HubSpot and email records. HubSpot is used by 92,657 companies runsonwhat tracks. ### What email provider does Checkr use? Checkr uses Microsoft 365 for email and office software, alongside Google Workspace and Apple Business, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 705,072 companies runsonwhat tracks. ### What does Checkr use for customer support? Checkr uses Zendesk for customer support and documentation, alongside Intercom, Drift and Decagon, according to runsonwhat (October 2026). runsonwhat found Zendesk through email records that authorize Zendesk. Zendesk is used by 41,176 companies runsonwhat tracks. ### What payment provider does Checkr use? Checkr uses Stripe for payments and billing, according to runsonwhat (October 2026). runsonwhat found Stripe through a DNS verification record for Stripe and code on checkr.com. Stripe is used by 26,616 companies runsonwhat tracks. ### How long has Checkr used Marketo? Checkr has used Marketo since at least October 2017, going by the first public certificate of the checkr.com subdomain that points at Marketo. Other long-running tools at Checkr include Salesforce (since January 2018), Auth0 (since January 2019) and LaunchNotes (since August 2023). ### Does Checkr use jQuery? Yes. runsonwhat found jQuery at Checkr through jQuery code on checkr.com. jQuery is a Frontend tool used by 901,964 companies runsonwhat tracks. ### Does Checkr use AI tools? Yes. runsonwhat has found Anthropic at Checkr; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Checkr may use more AI tools than these. ### Has Checkr changed tools recently? Yes. On runsonwhat's rechecks, Checkr started using Twilio (latest on October 18, 2026). A change counts only between two checks of checkr.com done the same way. ### Which companies have a tech stack similar to Checkr's? The companies with the stacks most like Checkr's are Eden, Toast, Mono and Method Financial, according to runsonwhat (October 2026). Each shares 12 to 23 tools with Checkr, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Checkr uses? runsonwhat reads public records only. Of the 79 tools at Checkr, 39 were found through code on checkr.com, 27 through DNS records, 7 through email records and 6 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and checkr.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/checkr.com (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.