Privacy and data

Your work stays yours.

This policy explains what Cornerstone collects, why it is needed, which services may process it, and the choices available to you.

Privacy contact: philip.ronald.hultgren@gmail.com

Privacy for browser extensions

This page covers the Cornerstone platform as a whole. Each released browser extension also has a focused policy describing that tool's data, storage, permissions, and providers.

Information we collect

We collect only the information needed to provide the tools you use, keep your work available, and operate the platform safely.

Account and profile

Your name, email address, authentication identifiers, avatar, sign-in activity, and account preferences.

Membership and billing

Your selected plan, subscription status, entitlement, purchase history, and payment references. Cornerstone does not store full card numbers.

Workspace content

The projects, resources, notes, files, forms, workflows, and settings you choose to save in Cornerstone tools.

Sessions and participation

Admission details, attendance, connection times, progress, responses, and activity state when you host or join a Session.

Technical information

Browser and device details, request information, security signals, errors, and operational logs needed to run and protect the service.

Services that may process data

These providers support specific parts of Cornerstone. The data each receives depends on the feature you use.

Accounts, application data, files, realtime features, and security

Google Firebase

Firebase services may process account identifiers, authentication activity, workspace or Session data, files, IP addresses, and device or request details to provide and secure Cornerstone.

Payments, subscriptions, and fraud prevention

Stripe

Stripe receives payment and transaction information when you purchase a membership. Cornerstone receives status and transaction references, while Stripe handles payment-card details.

Cookie-free, aggregate site measurement

Vercel Web Analytics

Vercel may process page paths, referrers, approximate location, and browser or device categories for aggregate traffic reporting. Its Web Analytics product does not use third-party cookies or persistent cross-site identifiers.

Optional identity providers

Google or GitHub sign-in

If you choose a connected sign-in method, the provider shares the profile and account details you approve so Cornerstone can create or authenticate your account.

Abuse prevention

Firebase App Check and reCAPTCHA

When enabled for a protected request, these services assess device and request signals and return a security token used to distinguish legitimate app traffic from abuse.

Browser storage

Functional, not advertising.

Cornerstone uses local or session storage for functions such as keeping checkout details between steps, remembering Session state, and caching signed-in interface data. Authentication and anti-abuse providers may also use storage that is necessary to secure the service.

We do not run Google Analytics or advertising cookies. Vercel Web Analytics is configured as cookie-free aggregate measurement. Because there are no optional analytics or advertising cookies to accept, Cornerstone does not currently show a cookie banner. If optional cookies are introduced, they should remain off until an appropriate consent choice is made.

How information is collected

We collect information directly when you create an account, choose a plan, contact support, build a workspace, upload a file, or participate in a Session.

We also receive limited information automatically from the browser and from providers involved in authentication, payments, hosting, security, and aggregate site measurement.

How information is used

We use information to provide the tools you choose, save and synchronise your work, authenticate access, manage memberships, process payments, support users, protect the service, and meet legal obligations.

We do not sell workspace content, use it for advertising, or use it to train AI models. We do not routinely inspect private workspace content. Access is limited to what is reasonably necessary for user-requested support, security investigation, service recovery, or legal compliance.

Storage, security, and retention

Cornerstone uses access controls, encrypted connections, provider security controls, and operational safeguards designed to protect personal information from loss, misuse, or unauthorised access.

Information is retained only while it is needed to provide the service, maintain security and records, resolve disputes, or meet legal and accounting obligations. When it is no longer required, it should be deleted or de-identified. You may ask us to delete your account information, subject to records we must keep.

Sharing and overseas processing

We share information only with providers that help operate the service, when you direct us to share it, or when disclosure is required for security, legal, or regulatory reasons. We do not sell personal information.

Some providers operate infrastructure outside Australia, including in the United States and other regions. We assess the providers used by Cornerstone and take reasonable steps appropriate to the information and applicable law.

Access, correction, and complaints

You may ask for access to personal information we hold about you, request a correction, ask for deletion where available, or make a privacy complaint by emailing philip.ronald.hultgren@gmail.com. We may need to verify your identity before acting on a request.

We will consider the request and explain the outcome. If you are not satisfied with our response, you may be able to contact the Office of the Australian Information Commissioner.

Data incidents

We investigate suspected unauthorised access, disclosure, or loss of personal information and take steps to reduce potential harm. Where the Notifiable Data Breaches scheme applies and serious harm is likely, affected people and the OAIC will be notified as required.

Source material

Search the public guidance and provider documentation used to describe Cornerstone’s privacy approach and current data tools.