Privacy Policy

1. Information we collect

• Account data — email, username, and a securely hashed password when you sign up with email. OAuth sign-in (GitHub, Google, Apple) provides basic profile information we use to create your account.
• Content you publish — papers, articles, comments, collections, hub posts, and other material you choose to add to the graph.
• Usage data — pages visited, search queries, and feature interactions, collected in aggregate to improve reliability and product design.
• Payment data — subscriptions are processed by Stripe or PayPal. We receive billing status and customer identifiers, not full card numbers.
• Indexed public data — Angestrom ingests publicly available AI research, models, repositories, and news from sources such as arXiv, Hugging Face, GitHub, and news feeds. This data is not personal information about you unless you authored it publicly at the source.

2. How we use your information

• Authenticate you and maintain your account and preferences (including theme and language).
• Operate search, the knowledge graph, intelligence feed, labs, academy paths, and community features.
• Process subscriptions, send service notices, and respond to support requests.
• Display your public profile and contributions as you configure them.
• Improve indexing, linking, and relevance across the graph.

3. Public graph & contributions

Content you publish to Angestrom may be visible to other users and indexed for search. You control visibility settings where the product provides them. Removing content from your account does not automatically remove copies that others may have referenced or saved externally.

4. AI features & third-party models

Features such as Live AI Intelligence, search answers, “Explain simply”, and news enrichment may send excerpts of your query or indexed content to AI providers (for example Anthropic Claude) to generate summaries and analysis. We configure these services to process data only as needed to deliver the feature. Do not submit sensitive personal information in prompts or public posts.

5. What we don't do

• We do not sell your personal data.
• We do not serve third-party ads targeted using your account identity.
• We share data only with infrastructure and payment providers required to run the service, under their own privacy obligations.

6. Your rights

You may access, correct, export, or delete account data from settings or by emailing info@angestrom.com. Depending on your location (including the EU/EEA under GDPR, or California under CCPA/CPRA), you may have additional rights to portability, restriction, or objection.

7. Security & retention

We use HTTPS encryption in transit, hashed passwords, and access controls appropriate to our scale. We retain account data while your account is active and for a reasonable period afterward for legal and operational needs. Graph data synced from public sources is retained to keep the knowledge base current.