# What does Calltree use?

Calltree (calltree.ai) shows public evidence of 12 tools, according to runsonwhat (last checked 2026-11-09).

- Industry: B2B
- Size: 11–50 employees
- Based in: San Francisco, United States
- LinkedIn: https://www.linkedin.com/company/calltree-ai

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [GoDaddy](https://www.runsonwhat.com/reverse/godaddy) | DNS | Custom domain |  |
| [Amazon Route 53](https://www.runsonwhat.com/reverse/route53) | DNS | DNS records |  |
| [Amazon CloudFront](https://www.runsonwhat.com/reverse/cloudfront) | CDN & Edge | Custom domain, Website code |  |
| [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | DNS verification records |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code |  |
| [PostHog](https://www.runsonwhat.com/reverse/posthog) | Analytics | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [RB2B](https://www.runsonwhat.com/reverse/rb2b) | 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 |  |
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records |  |
| [Oneleet](https://www.runsonwhat.com/reverse/oneleet) | Security & Compliance | Custom domain, DNS verification records |  |

## FAQ

### What tools does Calltree use?

As of November 2026, runsonwhat has found 12 tools at Calltree (calltree.ai) in public records. Edge & Hosting: GoDaddy, Amazon Route 53 and Amazon CloudFront. Application: Google Fonts. Data & Observability: Google Analytics and PostHog. Go-to-market: RB2B. Company Ops: Microsoft 365, Google Workspace and Oneleet. Last checked November 9, 2026.

### What cloud does Calltree run on?

Calltree uses Vercel for hosting and cloud infrastructure, according to runsonwhat (November 2026). runsonwhat found Vercel through a DNS verification record for Vercel. Vercel is used by 53,516 companies runsonwhat tracks.

### What sales tools does Calltree use?

The sales tools runsonwhat has found at Calltree are RB2B (November 2026); no CRM shows up in Calltree's public records. runsonwhat found RB2B through RB2B code on calltree.ai. RB2B is used by 3,166 companies runsonwhat tracks.

### What email provider does Calltree use?

Calltree uses Microsoft 365 for email and office software, alongside Google Workspace, 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 736,662 companies runsonwhat tracks.

### What analytics tools does Calltree use?

Calltree uses Google Analytics for analytics, alongside PostHog, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on calltree.ai. Google Analytics is used by 904,030 companies runsonwhat tracks.

### Does Calltree use Google Fonts?

Yes. runsonwhat found Google Fonts at Calltree through Google Fonts code on calltree.ai. Google Fonts is a Media & UI tool used by 825,709 companies runsonwhat tracks.

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

The companies with the stacks most like Calltree's are BentoLabs, Meticulate, Flowglad and Artos, according to runsonwhat (November 2026). Each shares 4 to 9 tools with Calltree, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Calltree uses?

runsonwhat reads public records only. Of the 12 tools at Calltree, 4 were found through code on calltree.ai, 4 through DNS records, 3 through subdomains that point at the vendor and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and calltree.ai about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/calltree.ai (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.