Privacy policy
Last updated: 16 March 2026
1. Who we are
Comparia ("we", "us", "our") operates the website comparia.ai and the application at app.comparia.ai. We are a UK-based service. If you have questions about this policy, contact us at privacy@comparia.ai.
2. What data we collect
We collect the minimum data needed to provide the service:
- Account data:email address and authentication credentials when you create an account.
- Decision data:the decisions, options, criteria and scores you create within the app. This is stored so you can access and manage your decisions.
- Usage data:anonymous, aggregated analytics (page views, feature usage) collected by Vercel Analytics. No personally identifiable information is included.
3. How we use your data
- To provide and maintain the Comparia service.
- To authenticate you and keep your account secure.
- To generate AI-powered recommendations based on the decision data you provide.
- To improve the service through anonymous usage analytics.
We do not sell your personal data. We do not use your data for advertising.
4. Cookies
Comparia uses a limited number of cookies, all of which are necessary for the service to function:
| Cookie | Purpose | Duration | Type |
|---|---|---|---|
| sb-*-auth-token | Authentication session. Keeps you signed in. | 1 year | Essential |
| sb-*-auth-token-code-verifier | PKCE verification for secure authentication. | Session | Essential |
We do not use tracking cookies, advertising cookies or third-party marketing cookies. Because we only use strictly essential cookies, a cookie consent banner is not required under EU/UK GDPR and the Privacy and Electronic Communications Regulations (PECR).
5. Third-party services
We use the following third-party services to operate Comparia:
- Supabase:authentication and database hosting. Your account and decision data is stored on Supabase infrastructure within the EU. See Supabase privacy policy.
- OpenAI:AI-powered recommendations and suggestions. Decision data (titles, options, criteria) is sent to OpenAI's API to generate recommendations. OpenAI does not use API data to train its models. See OpenAI privacy policy.
- Vercel:hosting and anonymous analytics. See Vercel privacy policy.
6. Affiliate links
Comparia includes affiliate links to third-party retailers such as Amazon and retailers within the Awin network. When you click an affiliate link, the destination retailer may set their own cookies in accordance with their own privacy policy. We earn a commission on qualifying purchases made through these links.
Affiliate links never influence the scoring, ranking or recommendations within Comparia. Recommendations are always based on the data and priorities you provide.
7. Data retention
Your account and decision data is retained for as long as your account is active. If you delete your account, all associated data will be permanently removed within 30 days.
Anonymous usage analytics are retained for up to 12 months.
8. Your rights
Under UK GDPR you have the right to:
- Access the personal data we hold about you.
- Request correction of inaccurate data.
- Request deletion of your data.
- Request a copy of your data in a portable format.
- Object to processing of your data.
To exercise any of these rights, email privacy@comparia.ai.
9. Data security
All data is transmitted over HTTPS. Authentication uses industry-standard protocols (PKCE, secure HTTP-only cookies). Database access is restricted by row-level security policies, ensuring users can only access their own data.
10. Children
Comparia is not directed at children under 16. We do not knowingly collect data from children. If you believe a child has provided us with personal data, please contact us and we will delete it.
11. Changes to this policy
We may update this policy from time to time. Changes will be posted on this page with an updated date. Continued use of the service after changes constitutes acceptance of the updated policy.