# What does Castos use?

Castos (castos.com) shows public evidence of 18 tools, according to runsonwhat (last checked 2026-10-20).

- Industry: Software
- Size: 11–50 employees
- Based in: Winter Garden, United States
- Founded: 2017
- LinkedIn: https://www.linkedin.com/company/castos

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Website code |  |

## Application

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

## 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 |  |
| [UptimeRobot](https://www.runsonwhat.com/reverse/uptimerobot) | Monitoring | Custom domain |  |

## 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 |  |
| [Microsoft Ads](https://www.runsonwhat.com/reverse/bing-ads) | Ads & Pixels | Website code |  |
| [HubSpot](https://www.runsonwhat.com/reverse/hubspot) | Sales & CRM | Custom domain, Email records, Website code |  |
| [HubSpot CMS](https://www.runsonwhat.com/reverse/hubspot-cms) | Website & CMS | Custom domain |  |
| [Help Scout](https://www.runsonwhat.com/reverse/helpscout) | Support & Docs | Email records, Custom domain |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records, Website code |  |
| [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records |  |
| [CookieYes](https://www.runsonwhat.com/reverse/cookieyes) | Security & Compliance | Website code |  |
| [DMARC Digests](https://www.runsonwhat.com/reverse/dmarcdigests) | Security & Compliance | Email records |  |

## FAQ

### What tools does Castos use?

As of October 2026, runsonwhat has found 18 tools at Castos (castos.com) in public records. Edge & Hosting: Cloudflare. Application: Google Fonts and Astro. Data & Observability: Google Analytics, Google Tag Manager and UptimeRobot. Go-to-market: Google Ads, Meta Pixel and Microsoft Ads. Company Ops: Google Workspace, SendGrid and CookieYes. Last checked October 20, 2026.

### What CRM does Castos use?

Castos uses HubSpot for its CRM, according to runsonwhat (October 2026). runsonwhat found HubSpot through a subdomain that points at HubSpot and email records. HubSpot is used by 93,604 companies runsonwhat tracks.

### What email provider does Castos use?

Castos uses Google Workspace for email and office software, according to runsonwhat (October 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace and code on castos.com. Google Workspace is used by 401,483 companies runsonwhat tracks.

### What does Castos use for customer support?

Castos uses Help Scout for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Help Scout through email records that authorize Help Scout and a subdomain. Help Scout is used by 2,873 companies runsonwhat tracks.

### What analytics tools does Castos use?

Castos uses Google Analytics for analytics, alongside Google Tag Manager, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on castos.com. Google Analytics is used by 874,059 companies runsonwhat tracks.

### What is Castos's website built with?

Castos uses HubSpot CMS for its website, according to runsonwhat (October 2026). runsonwhat found HubSpot CMS through a subdomain that points at HubSpot CMS. HubSpot CMS is used by 33,154 companies runsonwhat tracks.

### Does Castos use Google Fonts?

Yes. runsonwhat found Google Fonts at Castos through Google Fonts code on castos.com. Google Fonts is a Media & UI tool used by 805,409 companies runsonwhat tracks.

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

The companies with the stacks most like Castos' are Planet Crust, Textbroker, Flyr and Hingeto, according to runsonwhat (October 2026). Each shares 3 to 10 tools with Castos, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Castos uses?

runsonwhat reads public records only. Of the 18 tools at Castos, 7 were found through code on castos.com, 4 through email records, 3 through DNS records, 3 through subdomains that point at the vendor and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and castos.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/castos.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.