# What does Circular.co use?

Circular.co (circular.co) shows public evidence of 15 tools, according to runsonwhat (last checked 2026-10-24).

- Industry: Internet
- Size: 11–50 employees
- Based in: San Francisco, United States
- Founded: 2021
- LinkedIn: https://www.linkedin.com/company/circularco

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Website code |  |
| [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Custom domain |  |
| [Amazon Route 53](https://www.runsonwhat.com/reverse/route53) | DNS | DNS records |  |

## Application

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

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code |  |
| [Webflow](https://www.runsonwhat.com/reverse/webflow) | Website & CMS | Custom domain, Website code |  |
| [Discourse](https://www.runsonwhat.com/reverse/discourse) | Support & Docs | Custom domain |  |

## 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 |  |
| [SendGrid](https://www.runsonwhat.com/reverse/sendgrid) | Email Delivery | Email records |  |

## FAQ

### What tools does Circular.co use?

As of October 2026, runsonwhat has found 15 tools at Circular.co (circular.co) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Amazon Route 53. Application: jQuery, Google Fonts and GSAP. Data & Observability: Google Analytics and Google Tag Manager. Go-to-market: Google Ads, Webflow and Discourse. Company Ops: Microsoft 365, Google Workspace and SendGrid. Last checked October 24, 2026.

### What cloud does Circular.co run on?

Circular.co uses Amazon Web Services for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through a subdomain that points at Amazon Web Services. Amazon Web Services is used by 145,627 companies runsonwhat tracks.

### What email provider does Circular.co use?

Circular.co uses Microsoft 365 for email and office software, alongside Google Workspace, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 710,130 companies runsonwhat tracks.

### What does Circular.co use for customer support?

Circular.co uses Discourse for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Discourse through a subdomain that points at Discourse. Discourse is used by 722 companies runsonwhat tracks.

### What analytics tools does Circular.co use?

Circular.co uses Google Analytics for analytics, alongside Google Tag Manager, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on circular.co. Google Analytics is used by 878,885 companies runsonwhat tracks.

### What is Circular.co's website built with?

Circular.co uses Webflow for its website, according to runsonwhat (October 2026). runsonwhat found Webflow through a subdomain that points at Webflow and code on circular.co. Webflow is used by 34,828 companies runsonwhat tracks.

### Does Circular.co use jQuery?

Yes. runsonwhat found jQuery at Circular.co through jQuery code on circular.co. jQuery is a Frontend tool used by 914,969 companies runsonwhat tracks.

### Which companies have a tech stack similar to Circular.co's?

The companies with the stacks most like Circular.co's are Asset Vantage, Fulcrum Science, Ruby on Rails: Compress the complexity of modern web apps and Chitchat, according to runsonwhat (October 2026). Each shares 2 to 8 tools with Circular.co, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Circular.co uses?

runsonwhat reads public records only. Of the 15 tools at Circular.co, 7 were found through code on circular.co, 3 through DNS records, 3 through subdomains that point at the vendor and 2 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and circular.co about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/circular.co (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.