Privacy notice
This notice covers the www.tessavox.com website. It does not cover Tessavox systems deployed at customer sites, which run entirely on the customer's own servers.
Who we are
This website is operated by Ze Yu United Development Co., Ltd., 28F, No. 66, Sec. 1, Zhongxiao W. Rd., Zhongzheng Dist., Taipei City 100, Taiwan.
Website analytics
We use Google Analytics 4 to understand how the site is used, so we can improve it. It collects information such as the pages you view, how long you stay, the site that referred you, your approximate location (country or city), and your browser and device type. Google Analytics uses cookies or similar identifiers for this.
- We do not use advertising features, remarketing or ad personalization.
- For visitors from the European Economic Area, the United Kingdom and Switzerland, analytics cookies are not set; Google may receive limited, cookieless signals instead.
- Analytics data is kept for up to 14 months.
You can block cookies in your browser settings, or install the Google Analytics opt-out browser add-on. More about how Google handles this data: How Google uses information from sites that use its services.
When you contact us
If you email us, we use your name, organization, email address and message only to reply, arrange demos and follow up on your inquiry. We keep this correspondence for as long as needed for that business relationship.
What we do not do
We do not sell personal data, and this website has no forms, accounts or payment features.
Your rights and contact
To ask what we hold about you, or to have it corrected or deleted, email jeff.wu@zeyuud.com. We handle requests in line with Taiwan's Personal Data Protection Act and other laws that apply to you.
Last updated: October 6, 2026