Cookie Policy
What cookies ARQERA uses, why we use them, and how you can control them. Last updated: February 2026.
1. What Are Cookies
Cookies are small text files stored on your device when you visit a website. They are widely used to make websites work, improve user experience, and provide information to site operators. Some cookies are essential for the website to function; others help us understand how you use the site.
This Cookie Policy explains how Arqera Limited (“ARQERA”, “we”, “us”) uses cookies and similar technologies on arqera.io and the ARQERA platform.
2. Types of Cookies We Use
2.1 Essential Cookies
These cookies are strictly necessary for the platform to function. They enable core features like authentication, session management, and security. They cannot be disabled without breaking the platform.
| Cookie Name | Purpose | Expiry |
|---|---|---|
| arqera_session | User session management and authentication state | Session (browser close) |
| arqera_csrf | Cross-site request forgery protection | Session |
| arqera_auth | JWT authentication token | 7 days |
| arqera_consent | Records your cookie consent preferences | 12 months |
2.2 Analytics Cookies
These cookies help us understand how visitors interact with the platform so we can improve it. Analytics cookies are only set with your consent. We use PostHog for product analytics.
| Cookie Name | Purpose | Expiry |
|---|---|---|
| ph_phc_* | PostHog anonymous user identification for analytics | 12 months |
| ph_*_posthog | PostHog session and feature flag state | 12 months |
| ph_*_sessionid | PostHog session replay identification | 30 minutes |
2.3 Functional Cookies
These cookies remember your preferences and settings to provide a more personalised experience. They do not track you across other websites.
| Cookie Name | Purpose | Expiry |
|---|---|---|
| arqera_theme | Stores your dark/light mode preference | 12 months |
| arqera_locale | Stores your language/region preference | 12 months |
3. Third-Party Cookies
We do not use third-party advertising or tracking cookies. The only third-party cookies on our platform are set by:
| Provider | Purpose | Category |
|---|---|---|
| PostHog | Product analytics, feature flags, session replay | Analytics (consent required) |
| Stripe | Fraud prevention during payment processing | Essential |
Stripe cookies (__stripe_mid, __stripe_sid) are set only on pages with payment forms and are classified as essential because they are required for secure payment processing and fraud prevention.
4. Managing Your Cookie Preferences
4.1 Cookie Consent Banner
When you first visit ARQERA, a cookie consent banner allows you to accept or decline non-essential cookies. You can change your preferences at any time by clicking the cookie settings link in the website footer.
4.2 Browser Settings
Most browsers allow you to control cookies through their settings. You can typically set your browser to block all cookies, accept all cookies, or notify you when a cookie is set. Note that blocking essential cookies may prevent the platform from functioning correctly.
Instructions for managing cookies in common browsers:
- Chrome: Settings > Privacy and Security > Cookies and other site data
- Firefox: Settings > Privacy & Security > Cookies and Site Data
- Safari: Preferences > Privacy > Manage Website Data
- Edge: Settings > Cookies and site permissions > Manage and delete cookies
4.3 Do Not Track
ARQERA respects the Do Not Track (DNT) browser signal. When DNT is enabled, we will not set analytics cookies regardless of your consent banner selection.
5. Similar Technologies
In addition to cookies, we may use the following technologies:
- Local Storage — Used to store UI preferences (theme, sidebar state) and cached data for performance. This data does not leave your browser.
- Session Storage — Used for temporary state during your browsing session. Cleared when you close the browser tab.
6. Changes to This Policy
We may update this Cookie Policy to reflect changes in our practices or for legal or regulatory reasons. Material changes will be communicated via a prominent notice on the platform. The “Last updated” date reflects the most recent revision.
7. Contact
For questions about cookies or this policy:
Email: [email protected]
Address: Arqera Limited, 167-169 Great Portland Street, London, England, W1W 5PF
Arqera Limited (Company No. 16946092). Registered in England and Wales. 167-169 Great Portland Street, London, England, W1W 5PF.
Last updated: February 2026.
Questions about cookies?
Contact our privacy team for any questions about how we use cookies and similar technologies.