# What does Cleo use?

Cleo (extol.com) shows public evidence of 7 tools, according to runsonwhat (last checked 2026-10-30).

- 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 |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Tag Manager](https://www.runsonwhat.com/reverse/gtm) | Analytics | Website code |  |
| [Intellimize](https://www.runsonwhat.com/reverse/intellimize) | Flags & Experiments | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Brevo](https://www.runsonwhat.com/reverse/brevo) | Marketing | Website code |  |
| [Calendly](https://www.runsonwhat.com/reverse/calendly) | Sales & CRM | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records, Email records |  |
| [reCAPTCHA](https://www.runsonwhat.com/reverse/recaptcha) | Security & Compliance | Website code |  |

## FAQ

### What tools does Cleo use?

As of November 2026, runsonwhat has found 7 tools at Cleo (extol.com) in public records. Edge & Hosting: Cloudflare. Data & Observability: Google Tag Manager and Intellimize. Go-to-market: Brevo and Calendly. Company Ops: Microsoft 365 and reCAPTCHA. Last checked October 30, 2026.

### What sales tools does Cleo use?

The sales tools runsonwhat has found at Cleo are Calendly (November 2026); no CRM shows up in Cleo's public records. runsonwhat found Calendly through Calendly code on extol.com. Calendly is used by 31,242 companies runsonwhat tracks.

### What email provider does Cleo use?

Cleo uses Microsoft 365 for email and office software, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365 and email records. Microsoft 365 is used by 715,275 companies runsonwhat tracks.

### What analytics tools does Cleo use?

Cleo uses Google Tag Manager for analytics, according to runsonwhat (November 2026). runsonwhat found Google Tag Manager through Google Tag Manager code on extol.com. Google Tag Manager is used by 512,307 companies runsonwhat tracks.

### What marketing software does Cleo use?

Cleo uses Brevo for marketing, according to runsonwhat (November 2026). runsonwhat found Brevo through Brevo code on extol.com. Brevo is used by 80,921 companies runsonwhat tracks.

### Does Cleo use Cloudflare?

Yes. runsonwhat found Cloudflare at Cleo through DNS records that point at Cloudflare. Cloudflare is a CDN & Edge tool used by 714,483 companies runsonwhat tracks.

### Which companies have a tech stack similar to Cleo's?

The companies with the stacks most like Cleo's are General Catalyst, Building Industry Association Of Washington, Makrosystems Tecnologia De Informação and Venn, according to runsonwhat (November 2026). Each shares 3 to 4 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 7 tools at Cleo, 5 were found through code on extol.com, 2 through DNS records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and extol.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/extol.com (updated November 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.