Privacy
What Mestro keeps, what it does not, and how to ask for deletion.
Last updated 20 September 2026. Mestro is in preview; this page is kept current as the service changes.
Who operates Mestro
Mestro is a product of Agentic AI Systems Ltd, a company registered in the Dubai International Financial Centre (DIFC), registration number 14007, Level 3, Innovation One, DIFC, Dubai, United Arab Emirates. The DIFC Data Protection Law applies to us. Questions and requests: hello@callagentcloud.com.
What Mestro is
Mestro is a voice and text assistant that an organisation, such as an airport or a hotel, offers to its customers or staff. You reach it through that organisation's app, by phone, or on WhatsApp. It answers from the organisation's own information.
What we process to answer you
- Your messages. What you type or say is used to produce an answer and is kept as the conversation so the assistant can follow what was said before.
- Voice notes and calls. Speech is transcribed to text so the assistant can answer, and the assistant's spoken replies are generated from text. We keep the transcript with the conversation and do not keep the audio. On WhatsApp, media you send is also held for a limited time on Meta's own servers under Meta's terms, which we do not control.
- Photos. A photo you send is read to work out what you need and is not stored. Only what the assistant concluded from it, if you ask it to remember, is kept as text.
- Things you ask it to remember. A fact is saved only when you ask, is shown back to you as text, and can be removed by asking the assistant to forget it or by emailing us.
- Your account and channel. An invitation code, the organisation it grants access to, your language preference, usage counts, and, on WhatsApp, the phone number the messages come from.
Who else processes it
To produce answers we use a language model from Anthropic, speech recognition and synthesis from ElevenLabs and HUMAIN, and, for WhatsApp, Meta's WhatsApp Business Platform delivers the messages. Each receives only what is needed for that step. Our servers run on Amazon Web Services in Frankfurt, Germany.
What we do not do
- We do not sell your data and we do not use it for advertising.
- We do not store photos or use your conversations to train models.
- The assistant never makes a payment or a booking on its own; those are handed to a person to confirm.
This website
callagentcloud.com sets no cookies, runs no analytics and loads nothing from third parties. Our web server keeps ordinary access logs (address, page, time) for security, for a short period.
On WhatsApp
When you message Mestro on WhatsApp, WhatsApp carries the message to us. Your relationship with WhatsApp, including what it holds about you, is governed by WhatsApp's privacy policy. We receive your phone number and the content you send to Mestro's number; we do not receive your contacts, your other chats or your profile beyond the name WhatsApp shows us.
How long we keep it
Conversations and saved facts are kept while the service is provided to you, so that the assistant has the context it needs, and are deleted when you ask.
Deletion and your rights
Step-by-step instructions are on the data deletion page. In short: email hello@callagentcloud.com from the address or phone number you use with Mestro, or ask the organisation that invited you. We delete your conversations, saved facts and account link, and confirm when it is done. You may also ask what we hold about you and have it corrected.