Privacy Policy

Last updated 28 September 2025

Who we are: Seido AI Ltd, 17 Meriden Close, Bromley, BR1 2UF, United Kingdom.

This policy explains how we process personal data when you subscribe to our newsletter or otherwise interact with our website at www.seido.dev.

1. Information We Collect

1.1 Personal Information

We may collect personal information, such as your name, email address, and other contact details when you voluntarily provide it to us, such as when you register for an account, subscribe to newsletters, or contact us through the website.

1.2 Usage Information

We may collect information about your use of the website, including your IP address, browser type, device information, and pages visited. This information helps us analyse trends, administer the site, and improve user experience.

1.3 Subscription & Email Information

We may collect information about your subscription including your time of signup, form URL, page URL, consent text shown, confirmation status, and unsubscribe events. We may collect information about emails sent to your email including delivery status, opens, clicks, bounces, and unsubscribes (used to measure performance and maintain list hygiene). We do not intentionally collect special categories of data via the newsletter form.

2. How We Use Your Information

  • Send you our newsletter and product updates. Legal basis: Consent (GDPR Art. 6(1)(a)).
  • Maintain compliance records and manage the list (deliverability, abuse prevention, unsubscribes). Legal basis: Legitimate interests (Art. 6(1)(f)).
  • Analytics on email performance (aggregated open/click rates). Legal basis: Legitimate interests in improving communications.
  • Product analytics and conversion measurement (understanding how the site is used, which pages and features are engaged, and how visitors reach signup). Legal basis: Legitimate interests (Art. 6(1)(f)) in operating, securing, and improving the site.

You can withdraw consent at any time by clicking Unsubscribe in any email or by contacting us at help@seido.dev.

3. Who Processes Your Data

  • Kit (ConvertKit, LLC) for email consent, sending, and subscriber management.
  • Cloudflare for website hosting and delivery.
  • PostHog (EU region) for privacy-friendly product analytics.

We ensure appropriate contracts are in place with all processors, including Data Processing Addendums and Standard Contractual Clauses for international transfers where applicable.

4. Cookies & Analytics

We use cookies and similar technologies to enhance your experience. You can control cookies through your browser settings, but disabling them may affect certain features of the site.

Analytics: We use PostHog (hosted in the EU) to understand how the site is used. It automatically records usage events, including page views, clicks, and form interactions across the site, together with technical details such as your device, browser, and approximate location. This is limited to product-usage analytics; we do not use it for advertising or cross-site ad tracking, and we honour your browser's Do Not Track / Global Privacy Control signal.

Consent: If you visit from the EU, EEA, UK, or Switzerland, we ask for your consent before any analytics cookie is set. Until you choose, nothing is stored on your device. If you decline, we still count your visit anonymously using a privacy-preserving hash, with no cookies and nothing stored on your device. Visitors from other regions are counted with cookies by default.

Across our sites: PostHog sets a cookie scoped to the seido.dev domain so your activity is recognised consistently across this marketing site and the Seido app (app.seido.dev). If you later sign in, earlier anonymous browsing on this site may be linked to your account.

Your choice: You can turn analytics off on this device at any time using the button below. You can also reach us at help@seido.dev.

5. Data Retention

Active subscribers: until you unsubscribe or we stop sending the newsletter. We may extend retention where required by law or to establish, exercise, or defend legal claims.

6. Your Rights

Under GDPR and applicable UK/EU law, you can request:

  • Access to your data
  • Rectification of inaccuracies
  • Erasure (right to be forgotten)
  • Restriction or objection to processing
  • Portability of data you provided
  • Withdrawal of consent at any time

7. Security

We use appropriate technical and organisational measures, including TLS encryption in transit, access controls, least-privilege access, and regular review of processor security commitments.

8. Children's Privacy

Our website is not directed to individuals under 18. If you become aware that a child has provided us with personal information, please contact us and we will take steps to remove it.

9. Changes

We may update this policy periodically. Changes will be posted on this page. Continued use of the website constitutes acknowledgment of the updated policy.

10. Contact

Questions about this policy? Reach us at help@seido.dev.