**Cookie Policy**
Last updated: 4 October 2026
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This policy explains how Crystal Voice Data Ltd (company no. 13442068) uses cookies and similar technologies on www.crystalvoicedata.com. Cookies are small files stored on your device. Some are essential for the site to work. Others help us understand how the site is used or let us show embedded content. We only use non-essential cookies if you agree to them.
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**Your choices**
When you first visit, our banner lets you **Accept all**, **Reject all** or choose by category. You can change your mind at any time with the **Cookie settings** link in the footer of every page. You can also block or delete cookies in your browser settings, but some parts of the site may not work properly if you do.
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**Cookies we use**
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| Cookie | Provider | Purpose | How long | Category |
|---|---|---|---|---|
| CMP consent cookie | Crystal Voice Data (via our consent management platform) | Remembers your cookie choices | 12 months | Strictly necessary |
| `__cf_bm`, `cf_clearance`, `__cf_ob` | Cloudflare (on behalf of Vimeo) | Security / bot protection for embedded video | up to 12 months | Strictly necessary (only with embedded video) |
| `_ga`, `_ga_[ID]` | Google Analytics 4 (Google) | Counts visits and shows us which pages are used, in aggregate | up to 2 years | Analytics (opt-in) |
| `_sp_id.*`, `_sp_ses.*` | Duda (our website platform) | Website visit statistics | up to 13 months / 30 minutes | Analytics (opt-in) |
| `dm_total_visits`, `dm_last_visit`, `dm_this_page_view`, `dm_last_page_view`, `dm_timezone_offset` | Duda | Remembers previous visits so the site can show relevant content | up to 12 months | Analytics / personalisation (opt-in) |
| `chaty_app_user_id`, `chaty_app_referrer` | Chaty | Runs our chat / WhatsApp contact button | up to 12 months / session | Functional (opt-in) |
| `vuid` | Vimeo | Plays embedded videos and measures views | up to 13 months | Functional / embedded content (opt-in) |
| Local storage `cn_uc__` | Common Ninja | Displays our customer reviews widget | until cleared | Functional |
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We do not currently use advertising or remarketing cookies. If we add them, for example to measure Google Ads, they will only be set if you accept "Marketing" cookies, and we will update this page.
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**Third parties**
Google, Vimeo and Chaty may process data outside the UK. See our [Privacy Notice](/privacy) for how we protect international transfers.
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**Contact**
Questions about cookies: info@crystalvoicedata.com or 0333 5678 444.