Privacy

Who we are

Slipstream is run by Raplin Ventures Ltd, registered in England and Wales, company number 17276917. Registered office: 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ. We are the controller of the personal data described on this page.

To contact us about your data, write to us at our registered office: 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ.

What we collect and why

Early-access email list. If you join early access, we collect your email address. Our email provider, Brevo, sends you a confirmation email, and you're only added to the list once you click the link in it (double opt-in). Alongside your address we keep a note that you signed up from our early-access page and, once you confirm, your place in the queue and whether you qualify for the early-access offer. We also receive an email notification of each sign-up. We use your address only to email you about early access, live availability and search packs. Lawful basis: your consent, which you can withdraw at any time.

Your searches. When you search, the text you type (for example your points balances and where you want to fly) is put into the page address, as /search?q=…, and processed on our server to work out your results. We don't save your searches to a database and we don't link them to you. Because the text is part of the page address, it appears in the standard access logs kept by our web server and by Cloudflare and, if you accept analytics, in Microsoft Clarity — so please don't type anything into the search box that you wouldn't want recorded there. To understand your request and write the summary, we send the text of your search to Anthropic, our AI provider. Its AI only handles the wording: every number we show comes from our own calculations. Lawful basis: legitimate interests, in giving you the results you asked for.

Analytics. With your consent, Microsoft Clarity records how visitors use the site — pages visited, clicks, scrolling and anonymised session recordings — so we can see what works and fix what doesn't. The Clarity script loads on every page, but it sets cookies and records sessions only if you choose Accept in the cookie notice. Lawful basis: your consent.

Server and network logs. Like almost every website, our hosting provider's web server and Cloudflare (which protects and delivers the site) log technical details of each request: your IP address, browser type, the page address and the time. We use these to keep the site secure and working. Lawful basis: legitimate interests.

Partner links. Some links may go to partners — for example a flight search on Aviasales through our Travelpayouts partner link, or hotels and airport parking. If you click through, the partner and Travelpayouts (which tracks the referral so we can be paid commission) may set their own cookies under their own privacy policies. We don't pass them your searches or any other personal data ourselves — only the route, dates and cabin in the link.

Who processes your data for us

Brevo (the early-access list and its emails); Microsoft (Clarity analytics, only with your consent); our hosting provider (runs the server); Cloudflare (network delivery and security); and Anthropic (our AI provider, which reads the text of your searches). We don't sell your data. Some of these providers may process data outside the UK; where they do, we rely on the safeguards they provide for international transfers under UK data protection law.

How long we keep it

Your early-access email address and its notes: until you unsubscribe or ask us to delete them. Your searches: we don't store them ourselves; they exist only in the logs described above. Our server logs: up to 60 days. Cloudflare's network logs and Clarity data: kept by Cloudflare and Microsoft under their own retention settings.

Cookies and similar storage

Slipstream itself sets no cookies. Your browser keeps two small preferences in local storage on your device: your cookie choice, and whether you've closed the early-access banner. Microsoft Clarity sets cookies only after you choose Accept; no analytics cookies are set before that. To change your choice, clear this site's data in your browser and the cookie notice will appear again.

Your rights

Under UK data protection law you can ask for a copy of your personal data, ask us to correct it, delete it or restrict how we use it, object to how we use it, and ask for it in a portable format. Where we rely on your consent, you can withdraw it at any time — unsubscribe from any of our emails, or change your cookie choice as described above. To use any of these rights, write to us at our registered office: 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ.

Complaints

If you're unhappy with how we've handled your data, please tell us first so we can put it right. You can also complain to the Information Commissioner's Office (ICO): ico.org.uk/make-a-complaint.

Changes

We'll update this page if the way we handle data changes.

Last updated: 28 September 2026.