Privacy
Plain English summary of how the public beta handles your input. Last updated 16 June 2026. See also our legal & disclaimer page.
What you enter
You may enter a UK postcode or address, choose buying or renting, and optional priorities. Reports are generated from that input plus public data sources. We do not require an account to use the core service. If you choose to register, you sign in with an email address and password — handled by our authentication provider (see Accounts below).
Accounts and sign-in
When we enable accounts in your environment, you can register and log in with an email address and password. Sign-in is provided by Supabase Auth — a third-party authentication service. Your email is used to create your account, let you log in, and send password-reset messages if you forget your password. We do not store your password on Postknow servers; Supabase handles login securely on our behalf, but no online service can guarantee perfect security. If you add a display name or a default buying/renting preference on your account page, we store that in your profile. Saved property reports and saved area comparisons are planned for member accounts in a later update — they are not available yet. Postknow does not store card or payment details. To request account or profile data deletion, email us at the address below (ideally from the email on your account).
What we store
We store short-lived opaque report sessions so your report link can be opened again without putting your address in the URL. Sessions keep the original search input server-side for up to seven days. We may also store optional beta feedback, monitor sign-ups or purchase records if you choose to use those features. A redacted query preview may be kept for support, but not in public URLs.
Optional email
Email is optional for beta feedback and only used if you choose to leave it for follow-up. Report email delivery and postcode monitoring require an email address for the feature you request. We do not sell personal data.
Report URLs
New reports use opaque links such as /report/r/rs_abc123… — your address is not placed in the URL. Legacy /report?query=… URLs redirect to opaque sessions automatically; avoid bookmarking or sharing legacy links manually as they briefly expose the query string.
Public data sources
Reports draw on public UK datasets (EPC, Land Registry, planning, flood, crime and others). Those datasets are maintained by third parties; we do not control what they publish or retain. See our data sources & licences page for detail on each source, update frequency and limitations.
Recently viewed reports (this device)
If you use Compare with another home, we may store a short list of recently viewed report session IDs and safe labels in your browser localStorage only — not on our servers. You can remove entries or clear this list in the comparison UI. Do not share report session links unless you are comfortable with someone else opening that saved report.
Saved report comparison
When you compare saved reports, we process opaque session IDs server-side to regenerate comparison results. Comparison URLs contain session IDs — treat them as private links. Sessions expire after seven days according to our existing report retention.
Area Finder searches
When you use Area Finder, we process your optional destination and manual candidate areas to generate comparison results. We do not require an account for this public beta flow. Avoid entering unnecessary personal details; a postcode, station or town is sufficient.
Ofcom postcode cache
When broadband or mobile coverage signals are available, we may cache normalised postcode-level results for up to 30 days to reduce duplicate public-data lookups. We store parsed signals only, not your full address and not raw responses for resale. Purpose: reliability and responsible use of public data services.
Logs
Server error logs may record technical failures. We avoid logging full addresses or postcodes in routine logs. Do not include sensitive personal information in optional feedback comments.
Your rights
If you have used a feature that stored your email (feedback, monitoring, purchase, or an optional account), you can ask us to delete it by contacting the support email below. For registered accounts, email us from the address on the account and we will delete your profile and authentication record when we can verify the request. Postknow is operated from the UK; we aim to handle personal data carefully and proportionately.
Privacy questions? Contact support@postnow.co.uk.