# What does QR Code.io use?

QR Code.io (qr-code.io) shows public evidence of 17 tools, according to runsonwhat (last checked 2026-10-31).

## Edge & Hosting

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

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code |  |
| [Tailwind CSS](https://www.runsonwhat.com/reverse/tailwind) | Frontend | Website code |  |
| [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code |  |
| [PayPal](https://www.runsonwhat.com/reverse/paypal) | Payments & Billing | Website code |  |
| [OpenAI](https://www.runsonwhat.com/reverse/openai) | 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 |  |
| [Hotjar](https://www.runsonwhat.com/reverse/hotjar) | Analytics | Website code |  |
| [New Relic](https://www.runsonwhat.com/reverse/newrelic) | Monitoring | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code |  |
| [Microsoft Ads](https://www.runsonwhat.com/reverse/bing-ads) | Ads & Pixels | Website code |  |
| [Brevo](https://www.runsonwhat.com/reverse/brevo) | Marketing | DNS verification records, Email records, Website code |  |
| [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Email records, Website code |  |

## Company Ops

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

## FAQ

### What tools does QR Code.io use?

As of November 2026, runsonwhat has found 17 tools at QR Code.io (qr-code.io) in public records. Edge & Hosting: Cloudflare. Application: React, Tailwind CSS and Next.js. Data & Observability: Google Analytics, Google Tag Manager and Microsoft Clarity. Go-to-market: Google Ads, Microsoft Ads and Brevo. Company Ops: Microsoft 365. Last checked October 31, 2026.

### What email provider does QR Code.io use?

QR Code.io uses Microsoft 365 for email and office software, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365 and a DNS verification record. Microsoft 365 is used by 716,268 companies runsonwhat tracks.

### What does QR Code.io use for customer support?

QR Code.io uses Zendesk for customer support and documentation, according to runsonwhat (November 2026). runsonwhat found Zendesk through email records that authorize Zendesk and code on qr-code.io. Zendesk is used by 42,503 companies runsonwhat tracks.

### What payment provider does QR Code.io use?

QR Code.io uses PayPal for payments and billing, according to runsonwhat (November 2026). runsonwhat found PayPal through PayPal code on qr-code.io. PayPal is used by 35,143 companies runsonwhat tracks.

### What analytics tools does QR Code.io use?

QR Code.io uses Google Analytics for analytics, alongside Google Tag Manager, Microsoft Clarity and Hotjar, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on qr-code.io. Google Analytics is used by 899,753 companies runsonwhat tracks.

### What marketing software does QR Code.io use?

QR Code.io uses Brevo for marketing, according to runsonwhat (November 2026). runsonwhat found Brevo through a DNS verification record for Brevo and email records. Brevo is used by 81,034 companies runsonwhat tracks.

### Does QR Code.io use Cloudflare?

Yes. runsonwhat found Cloudflare at QR Code.io through DNS records that point at Cloudflare and email records. Cloudflare is a CDN & Edge tool used by 715,054 companies runsonwhat tracks.

### Does QR Code.io use AI tools?

Yes. runsonwhat has found OpenAI at QR Code.io; OpenAI, for example, through a DNS verification record for OpenAI. AI services called only from servers leave no public trace, so QR Code.io may use more AI tools than these.

### How does runsonwhat know what QR Code.io uses?

runsonwhat reads public records only. Of the 17 tools at QR Code.io, 11 were found through code on qr-code.io, 4 through DNS records and 2 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and qr-code.io about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/qr-code.io (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.