1. Who We Are

Zentro Technologies, a sole proprietorship owned by Subodh Banerjee, 446 Hyde Park Dr., San Jose, CA 95136, USA. zentroStack was founded by Rajeeb Mookhopadhyay. Contact: hello@zentrostack.com.

2. Two Kinds of Data

Our customers’ data. Information about the businesses and people who sign up for zentroStack and visitors to our website. For this data, we decide how it is used (we are the controller).
Our customers’ customer data. Calls, messages, bookings, quotes and invoices that flow through a customer’s zentroStack account. We process this only to provide the service, on our customer’s instructions (we are the processor). Each business using zentroStack is responsible for telling its own customers how their data is used.

3. What We Collect

Account details: name, business name, email, phone number, country, billing details.
Website data: pages visited, device and browser information, cookies (see section 9).
Service data: call details and the written transcript of each call (call audio is not stored); WhatsApp, Instagram and Messenger messages; contact details, bookings, quotes, signatures and invoices created in the apps.
Support data: messages you send us.

4. How We Use It

To provide, run and improve the apps.
To answer calls and messages through our AI on your behalf, using the information you give it.
To bill you and prevent fraud.
To send service messages and, with your consent where required, product updates.
To meet legal obligations.

We do not sell personal data.

5. Service Providers

We use trusted providers to run zentroStack, including providers for hosting, AI processing, telephony, messaging, payments and email. Current providers: Hostinger (server hosting), OpenAI (AI processing), Twilio (phone calls), Meta (WhatsApp Business Platform, Instagram and Messenger), Stripe (payments), Google (sign-in with Google and website analytics) and Zoho (email). They process data only to provide their service to us.

6. Data from Facebook, Instagram and WhatsApp

When a business connects its Facebook Page, Instagram account or WhatsApp Business account to zentroStack, we receive the account names and IDs, an access token and the messages sent to and from those accounts. We use this data only to show the messages in zentroStack and to send replies, including AI replies, on the business’s behalf. We do not sell this data or use it for advertising. A business can disconnect these accounts at any time; see our Data Deletion Instructions.

7. International Transfers

Our customers and providers are in many countries, so data may be processed outside your country. Where the law requires, we use safeguards such as standard contractual clauses.

8. How Long We Keep Data

We keep account and service data while your account is active and for 90 days after it closes, unless the law requires longer. You can ask us to delete data sooner.

9. Cookies

We use essential cookies to run the site and, with your consent where required, analytics cookies to understand how it is used. You can change cookie settings in your browser.

10. Your Rights

Depending on where you live, including under the EU and UK GDPR and the California Consumer Privacy Act, you may have the right to access, correct, delete or export your data, to object to or restrict processing and to withdraw consent. Email hello@zentrostack.com to use these rights. If you are a customer of a business that uses zentroStack, contact that business first.

11. Security

Each business’s data is isolated at database level, access is controlled by role permissions and card payments are handled by Stripe. No system is perfectly secure, and we will tell affected customers about a breach as the law requires.

12. Children

zentroStack is a business service and is not meant for anyone under 16.

13. Changes

We may update this policy. We will post the new version here and update the effective date, and tell customers about important changes by email.

14. Contact

hello@zentrostack.com · Zentro Technologies, 446 Hyde Park Dr., San Jose, CA 95136, USA

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