# What does Cleo use? Cleo (cleo.com) shows public evidence of 38 tools, according to runsonwhat (last checked 2026-10-10). - Based in: United States - Founded: 1976 - LinkedIn: https://www.linkedin.com/company/cleo-communications ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Website code | | | [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Website code | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code | | | [Tailwind CSS](https://www.runsonwhat.com/reverse/tailwind) | Frontend | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | 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 | | | [Microsoft Clarity](https://www.runsonwhat.com/reverse/clarity) | Analytics | Website code | | | [Crazy Egg](https://www.runsonwhat.com/reverse/crazyegg) | Analytics | Website code | | | [Atlassian Statuspage](https://www.runsonwhat.com/reverse/statuspage) | Monitoring | Custom domain | 2021-08 | | [Intellimize](https://www.runsonwhat.com/reverse/intellimize) | Flags & Experiments | 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 | 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 | | | [Brevo](https://www.runsonwhat.com/reverse/brevo) | Marketing | Website code | | | [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Custom domain, Email records, Website code | 2019-09 | | [Salesforce](https://www.runsonwhat.com/reverse/salesforce) | Sales & CRM | Email records, Website code | | | [Calendly](https://www.runsonwhat.com/reverse/calendly) | Sales & CRM | 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 | | | [Taboola](https://www.runsonwhat.com/reverse/taboola) | Ads & Pixels | Website code | | | [Marketo](https://www.runsonwhat.com/reverse/marketo) | Marketing | Custom domain | | | [Clickagy](https://www.runsonwhat.com/reverse/clickagy) | Sales & CRM | Website code | | | [6sense](https://www.runsonwhat.com/reverse/sixsense) | Sales & CRM | Website code | | | [Oracle Eloqua](https://www.runsonwhat.com/reverse/oracle-eloqua) | Marketing | Email records, Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records, Email records, Website code | | | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records | | | [reCAPTCHA](https://www.runsonwhat.com/reverse/recaptcha) | Security & Compliance | Website code | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | | [Atlassian](https://www.runsonwhat.com/reverse/atlassian) | Dev Tools | DNS verification records | | | [Amazon SES](https://www.runsonwhat.com/reverse/ses) | Email Delivery | DNS verification records | | | [Mailgun](https://www.runsonwhat.com/reverse/mailgun) | Email Delivery | Custom domain, Email records | | | [OneTrust](https://www.runsonwhat.com/reverse/onetrust) | Security & Compliance | Website code | | | [KnowBe4](https://www.runsonwhat.com/reverse/knowbe4) | Security & Compliance | DNS verification records | | | [Zoom](https://www.runsonwhat.com/reverse/zoom) | Collaboration | DNS verification records | | | [Webex](https://www.runsonwhat.com/reverse/webex) | Collaboration | DNS verification records | | ## FAQ ### What tools does Cleo use? As of October 2026, runsonwhat has found 38 tools at Cleo (cleo.com) in public records. Edge & Hosting: Cloudflare and Amazon Web Services. Application: Google Fonts, Tailwind CSS and Anthropic. Data & Observability: Google Analytics, Google Tag Manager and Microsoft Clarity. Go-to-market: Google Ads, Meta Pixel and Microsoft Ads. Company Ops: Microsoft 365, Google Workspace and reCAPTCHA. Last checked October 10, 2026. ### What cloud does Cleo run on? Cleo 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 cleo.com. Amazon Web Services is used by 144,735 companies runsonwhat tracks. ### What CRM does Cleo use? Cleo uses Salesforce for its CRM, alongside Calendly, ZoomInfo and Clickagy, according to runsonwhat (October 2026). runsonwhat found Salesforce through email records that authorize Salesforce and code on cleo.com. Salesforce is used by 33,408 companies runsonwhat tracks. ### What email provider does Cleo use? Cleo 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 and email records. Microsoft 365 is used by 700,585 companies runsonwhat tracks. ### What does Cleo use for customer support? Cleo uses Zendesk for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Zendesk through a subdomain that points at Zendesk and email records, and Cleo has used it since at least September 2019. Zendesk is used by 40,822 companies runsonwhat tracks. ### What analytics tools does Cleo use? Cleo uses Google Analytics for analytics, alongside Google Tag Manager, Microsoft Clarity and Crazy Egg, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on cleo.com. Google Analytics is used by 850,006 companies runsonwhat tracks. ### How long has Cleo used Zendesk? Cleo has used Zendesk since at least September 2019, going by the first public certificate of the cleo.com subdomain that points at Zendesk. Other long-running tools at Cleo include Atlassian Statuspage (since August 2021). ### Does Cleo use Google Fonts? Yes. runsonwhat found Google Fonts at Cleo through Google Fonts code on cleo.com. Google Fonts is a Media & UI tool used by 789,573 companies runsonwhat tracks. ### Does Cleo use AI tools? Yes. runsonwhat has found Anthropic at Cleo; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Cleo may use more AI tools than these. ### Which companies have a tech stack similar to Cleo's? The companies with the stacks most like Cleo's are Les Mills, Domo, Teradata and Genesys Cloud Services, according to runsonwhat (October 2026). Each shares 12 to 19 tools with Cleo, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Cleo uses? runsonwhat reads public records only. Of the 38 tools at Cleo, 21 were found through code on cleo.com, 10 through DNS records, 4 through subdomains that point at the vendor and 3 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and cleo.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/cleo.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.