# What does Rainbow use?

Rainbow (openrainbow.com) shows public evidence of 20 tools, according to runsonwhat (last checked 2026-10-10).

- Industry: Telecommunications
- Size: 10,000+ employees
- Based in: Colombes, France
- LinkedIn: https://www.linkedin.com/company/openrainbow

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | DNS verification records |  |
| [Gandi](https://www.runsonwhat.com/reverse/gandi) | DNS | Email 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 |  |
| [Font Awesome](https://www.runsonwhat.com/reverse/fontawesome) | Media & UI | Website code |  |
| [React](https://www.runsonwhat.com/reverse/react) | 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 |  |
| [Hotjar](https://www.runsonwhat.com/reverse/hotjar) | Analytics | Website code |  |
| [Contentsquare](https://www.runsonwhat.com/reverse/contentsquare) | Analytics | Website code |  |
| [Instatus](https://www.runsonwhat.com/reverse/instatus) | Monitoring | Custom domain |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code |  |
| [Mailchimp](https://www.runsonwhat.com/reverse/mailchimp) | Marketing | Email records |  |
| [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Custom domain, Email records |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records |  |
| [OneTrust](https://www.runsonwhat.com/reverse/onetrust) | Security & Compliance | Website code |  |
| [Mailjet](https://www.runsonwhat.com/reverse/mailjet) | Email Delivery | Email records |  |
| [EasyDMARC](https://www.runsonwhat.com/reverse/easydmarc) | Security & Compliance | Email records |  |

## FAQ

### What tools does Rainbow use?

As of October 2026, runsonwhat has found 20 tools at Rainbow (openrainbow.com) in public records. Edge & Hosting: Vercel and Gandi. Application: jQuery, Google Fonts and Font Awesome. Data & Observability: Google Analytics, Google Tag Manager and Hotjar. Go-to-market: Google Ads, Mailchimp and Zendesk. Company Ops: Microsoft 365, OneTrust and Mailjet. Last checked October 10, 2026.

### What cloud does Rainbow run on?

Rainbow uses Vercel for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Vercel through a DNS verification record for Vercel. Vercel is used by 46,658 companies runsonwhat tracks.

### What email provider does Rainbow use?

Rainbow uses Microsoft 365 for email and office software, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 701,710 companies runsonwhat tracks.

### What does Rainbow use for customer support?

Rainbow uses Zendesk for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Zendesk through a subdomain that points at Zendesk and email records. Zendesk is used by 40,934 companies runsonwhat tracks.

### What analytics tools does Rainbow use?

Rainbow uses Google Analytics for analytics, alongside Google Tag Manager, Hotjar and Contentsquare, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on openrainbow.com. Google Analytics is used by 853,379 companies runsonwhat tracks.

### What marketing software does Rainbow use?

Rainbow uses Mailchimp for marketing, according to runsonwhat (October 2026). runsonwhat found Mailchimp through email records that authorize Mailchimp. Mailchimp is used by 113,225 companies runsonwhat tracks.

### Does Rainbow use jQuery?

Yes. runsonwhat found jQuery at Rainbow through jQuery code on openrainbow.com. jQuery is a Frontend tool used by 897,845 companies runsonwhat tracks.

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

The companies with the stacks most like Rainbow's are DIDWW Ireland, Voip.ms, Teachstone and Avarda Bank, according to runsonwhat (October 2026). Each shares 7 to 9 tools with Rainbow, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Rainbow uses?

runsonwhat reads public records only. Of the 20 tools at Rainbow, 10 were found through code on openrainbow.com, 4 through email records, 3 through DNS records, 2 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 openrainbow.com about monthly.


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