In short
When you enquire about a property through an estate agent using Signal, our AI-powered assistant helps the agency arrange viewings and understand your preferences via WhatsApp. This notice explains what data we collect, how we use it, and your rights.
You can opt out at any time by replying STOP to any WhatsApp or SMS message.
Who is responsible for your data?
The estate agent you enquired with is the Data Controller — they decide how and why your data is processed.
Signal PropTech Ltd is the Data Processor — we process your data on behalf of the agency to provide our service.
What we collect
When you enquire about a property and interact with us via WhatsApp, we collect:
- Contact information — name, phone number, email address (from your property portal enquiry)
- Property preferences — areas, budget range, bedrooms, must-haves (from our conversation)
- Buying position — whether you’re a cash buyer, have a mortgage, are selling, etc.
- Viewing feedback — your ratings and comments after property viewings
- Conversation history — messages sent and received via WhatsApp
How we use your data
- To arrange property viewings on your behalf
- To understand your requirements and match you with suitable properties
- To collect feedback after viewings to improve the service
- To provide the agency’s team with buyer intelligence so they can help you better
AI processing
We use an AI assistant powered by Anthropic Claude to process our WhatsApp conversations. The AI helps us:
- Understand your property requirements from natural conversation
- Extract structured preferences (budget, locations, features)
- Score how ready you are to proceed with a purchase
Your conversation data is sent to Anthropic’s API for processing. Anthropic does not use your data to train their AI models. A Data Processing Agreement with Standard Contractual Clauses is in place.
Automated profiling
We use automated processing to create a buyer readiness score based on your financial position, timeline, and engagement. This score helps the agency’s team prioritise viewings and follow-ups.
This profiling does not produce legal effects or significantly affect you. No decisions about your ability to purchase property are made solely by automated processing. The score is a tool for the agency team, not a gatekeeper.
Who has access to your data
| Provider | Purpose | Data shared |
|---|---|---|
| Your estate agent | The agency you enquired with | All data (they are the Data Controller) |
| Anthropic | AI conversation processing | Conversation text, preferences |
| Twilio | WhatsApp and SMS message delivery | Phone number, message content |
| Supabase | Secure database hosting | All stored data (encrypted at rest) |
All providers have signed Data Processing Agreements. Data may be transferred outside the UK/EU with appropriate safeguards (Standard Contractual Clauses) in place.
How long we keep your data
| Situation | Retention |
|---|---|
| Active buyers | Duration of engagement + 12 months |
| Inactive buyers | 24 months from last activity |
| Opted-out buyers | Deleted immediately |
SMS / Text Messaging
This section applies to SMS text messages sent by Signal PropTech Ltd under our Signal Tours Assistant (Signal PropTech) programme, in addition to the rest of this notice. Signal PropTech is the sender of every message.
- Company: Signal Proptech Ltd, a company registered in the United Kingdom, registered office Pearl Assurance Building, 1 Donegall Square East, Belfast BT1 5HB. Contact: support@signalproptech.com.
- What we text: transactional messages to schedule, confirm, reschedule or cancel property viewing (showing) appointments, sent by Signal PropTech to coordinate viewings for licensed real estate agents who use our service. We do not send marketing messages.
- Message frequency varies (typically 2–10 messages per viewing request). Message and data rates may apply. Reply STOP to opt out or HELP for help.
- What we collect: your mobile number, the content of messages sent and received, and timestamps. This information is used only to coordinate viewing appointments.
No mobile information will be shared with third parties or affiliates for marketing or promotional purposes. Text messaging originator opt-in data and consent will not be shared with any third parties.
Retention: SMS records (mobile number, message content and timestamps) are kept for the duration of the viewing engagement plus 12 months, and no longer than 24 months from the last message, after which they are deleted. If you reply STOP, your message history is deleted and only your mobile number is kept on our opt-out list so that we do not message you again.
Deletion: to request deletion of your SMS data at any time, email support@signalproptech.com from the number or email you used, or contact the real estate agent you were coordinating a viewing with. We action requests within 30 days. See also our Data Deletion page.
Your rights
Under UK GDPR and EU GDPR, you have the right to:
- Access — request a copy of all data we hold about you
- Deletion — request complete erasure of your data
- Rectification — correct inaccurate data
- Portability — receive your data in a machine-readable format
- Object — object to processing based on legitimate interests
- Restrict — limit how we process your data
- Withdraw consent — at any time, without affecting prior processing
How to exercise your rights
- Opt out of messaging: reply STOP to any WhatsApp or SMS message
- Request data export or deletion: contact the estate agent you enquired with directly. They are the Data Controller for your data.
- Questions about Signal’s processing: email support@signalproptech.com
Legal basis
We process your data based on:
- Consent — you enquired about a property, initiating contact with us
- Legitimate interest — the agency has a legitimate interest in qualifying buyer enquiries to provide an efficient property service
For marketing communications (re-engagement campaigns), we rely on explicit consent only.
Supervisory authorities
If you have concerns about how your data is handled, you can contact:
- UK: Information Commissioner’s Office — ico.org.uk
- Ireland: Data Protection Commission — dataprotection.ie