# What does Harper Collins Publishers Limited use?

Harper Collins Publishers Limited (collinsdictionary.com) shows public evidence of 48 tools, according to runsonwhat (last checked 2026-10-20).

- Size: 1–10 employees
- Based in: United Kingdom
- LinkedIn: https://www.linkedin.com/company/harper-collins-publishers-limited

## 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 |  |
| [OpenAI](https://www.runsonwhat.com/reverse/openai) | AI | DNS verification records |  |
| [Auth0](https://www.runsonwhat.com/reverse/auth0) | Auth & Identity | Custom domain |  |

## 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 |  |
| [comScore](https://www.runsonwhat.com/reverse/comscore) | Analytics | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code |  |
| [LinkedIn Insight Tag](https://www.runsonwhat.com/reverse/linkedin-insight) | Ads & Pixels | Website code |  |
| [Google Ad Manager](https://www.runsonwhat.com/reverse/google-ad-manager) | Ads & Pixels | Website config, Website code |  |
| [Microsoft Xandr](https://www.runsonwhat.com/reverse/xandr) | Ads & Pixels | Website config, Website code |  |
| [Criteo](https://www.runsonwhat.com/reverse/criteo) | Ads & Pixels | Website config, Website code |  |
| [LiveRamp](https://www.runsonwhat.com/reverse/liveramp) | Ads & Pixels | Website code |  |
| [Magnite](https://www.runsonwhat.com/reverse/magnite) | Ads & Pixels | Website config, Website code |  |
| [PubMatic](https://www.runsonwhat.com/reverse/pubmatic) | Ads & Pixels | Website config, Website code |  |
| [Adobe Audience Manager](https://www.runsonwhat.com/reverse/adobe-audience-manager) | Ads & Pixels | Website code |  |
| [StackAdapt](https://www.runsonwhat.com/reverse/stackadapt) | Ads & Pixels | Website code |  |
| [OpenX](https://www.runsonwhat.com/reverse/openx) | Ads & Pixels | Website config, Website code |  |
| [Amazon Publisher Services](https://www.runsonwhat.com/reverse/amazon-publisher-services) | Ads & Pixels | Website config |  |
| [Media.net](https://www.runsonwhat.com/reverse/media-net) | Ads & Pixels | Website config, Website code |  |
| [Index Exchange](https://www.runsonwhat.com/reverse/index-exchange) | Ads & Pixels | Website config |  |
| [Sovrn](https://www.runsonwhat.com/reverse/sovrn) | Ads & Pixels | Website config |  |
| [TripleLift](https://www.runsonwhat.com/reverse/triplelift) | Ads & Pixels | Website config, Website code |  |
| [Taboola](https://www.runsonwhat.com/reverse/taboola) | Ads & Pixels | Website config |  |
| [Amazon Advertising](https://www.runsonwhat.com/reverse/amazon-advertising) | Ads & Pixels | Website code |  |
| [Teads](https://www.runsonwhat.com/reverse/teads) | Ads & Pixels | Website config, Website code |  |
| [RTB House](https://www.runsonwhat.com/reverse/rtb-house) | Ads & Pixels | Website code |  |
| [Quantcast](https://www.runsonwhat.com/reverse/quantcast) | Ads & Pixels | Website code |  |
| [Demandbase](https://www.runsonwhat.com/reverse/demandbase) | Sales & CRM | Website code |  |
| [Adobe Advertising](https://www.runsonwhat.com/reverse/adobe-advertising) | Ads & Pixels | Website code |  |
| [Bombora](https://www.runsonwhat.com/reverse/bombora) | Sales & CRM | Website code |  |
| [MediaMath](https://www.runsonwhat.com/reverse/mediamath) | Ads & Pixels | Website code |  |
| [33Across](https://www.runsonwhat.com/reverse/33across) | Ads & Pixels | Website code |  |
| [Lotame](https://www.runsonwhat.com/reverse/lotame) | Ads & Pixels | Website code |  |
| [Nativo](https://www.runsonwhat.com/reverse/nativo) | Ads & Pixels | Website code |  |
| [MGID](https://www.runsonwhat.com/reverse/mgid) | Ads & Pixels | Website code |  |
| [MNTN](https://www.runsonwhat.com/reverse/mntn) | Ads & Pixels | Website code |  |
| [Clickagy](https://www.runsonwhat.com/reverse/clickagy) | Sales & CRM | Website code |  |
| [Smart Ad Server](https://www.runsonwhat.com/reverse/smart-ad-server) | Ads & Pixels | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records, Email records |  |
| [reCAPTCHA](https://www.runsonwhat.com/reverse/recaptcha) | Security & Compliance | Website code |  |
| [Amazon SES](https://www.runsonwhat.com/reverse/ses) | Email Delivery | DNS verification records, Email records |  |
| [Let's Encrypt](https://www.runsonwhat.com/reverse/letsencrypt) | Security & Compliance | DNS records |  |
| [Proofpoint](https://www.runsonwhat.com/reverse/proofpoint) | Security & Compliance | Email records |  |
| [Sectigo](https://www.runsonwhat.com/reverse/sectigo) | Security & Compliance | DNS records |  |
| [DigiCert](https://www.runsonwhat.com/reverse/digicert) | Security & Compliance | DNS records |  |
| [Google Trust Services](https://www.runsonwhat.com/reverse/google-trust) | Security & Compliance | DNS records |  |
| [OneTrust](https://www.runsonwhat.com/reverse/onetrust) | Security & Compliance | Website code |  |

## FAQ

### What tools does Harper Collins Publishers use?

As of October 2026, runsonwhat has found 48 tools at Harper Collins Publishers (collinsdictionary.com) in public records. Edge & Hosting: Cloudflare. Application: Google Fonts, OpenAI and Auth0. Data & Observability: Google Analytics, Google Tag Manager and comScore. Go-to-market: Google Ads, LinkedIn Insight Tag and Google Ad Manager. Company Ops: Microsoft 365, reCAPTCHA and Amazon SES. Last checked October 20, 2026.

### What sales tools does Harper Collins Publishers use?

The sales tools runsonwhat has found at Harper Collins Publishers are Demandbase, Bombora and Clickagy (October 2026); no CRM shows up in Harper Collins Publishers' public records. runsonwhat found Demandbase through Demandbase code on collinsdictionary.com.

### What email provider does Harper Collins Publishers use?

Harper Collins Publishers 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 and email records. Microsoft 365 is used by 716,324 companies runsonwhat tracks.

### What analytics tools does Harper Collins Publishers use?

Harper Collins Publishers uses Google Analytics for analytics, alongside Google Tag Manager and comScore, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on collinsdictionary.com. Google Analytics is used by 893,294 companies runsonwhat tracks.

### What does Harper Collins Publishers use for login and identity?

Harper Collins Publishers uses Auth0 for sign-in and identity, according to runsonwhat (October 2026). runsonwhat found Auth0 through a subdomain that points at Auth0. Auth0 is used by 5,809 companies runsonwhat tracks.

### Does Harper Collins Publishers use Google Fonts?

Yes. runsonwhat found Google Fonts at Harper Collins Publishers through Google Fonts code on collinsdictionary.com. Google Fonts is a Media & UI tool used by 817,873 companies runsonwhat tracks.

### Does Harper Collins Publishers use AI tools?

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

### How does runsonwhat know what Harper Collins Publishers uses?

runsonwhat reads public records only. Of the 48 tools at Harper Collins Publishers, 25 were found through code on collinsdictionary.com, 13 through website configuration files, 8 through DNS records, 1 through email records and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and collinsdictionary.com about monthly.


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