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Privacy Policy

Last updated: April 2026

Introduction

Contexly is a browser extension that provides AI-generated context notes for social media posts. We respect your privacy. This policy explains what data we collect and how we use it.

Data We Collect

  • API keys — Stored locally in your browser (chrome.storage.local). Never sent to our servers.
  • Post content — When you click "Context", the post text and metadata are sent to our backend to generate context. We do not store post content beyond the cache duration (72h).
  • Cache — We cache context results (keyed by URL hash, not content) for up to 72h to reduce latency and API costs. Cache entries are anonymous — no user identifier is attached.
  • No accounts, no tracking — We don't require accounts, don't use cookies, and don't track you across sites.

Data Flow

When you click "Context" on a post, the extension extracts the post text, author, and URL from the page. This data is sent to our backend (a Cloudflare Worker), which calls your chosen LLM provider (using your API key) with native web search enabled to generate a context note with verified sources. The result is returned to the extension and displayed in the side panel.

What Stays Local

The following data never leaves your browser:

  • Your API keys (stored in chrome.storage.local)
  • Your preferences (language, LLM provider, model, detail level, tone)
  • A local cache of recent context results (24h TTL, max 100 entries)
  • Your history of analyzed posts (max 50 entries)

What Is Transmitted

The following data is sent to external services when you click "Context":

  • Post text, author, and URL are sent to our backend (Cloudflare Worker) to generate the context note.
  • The LLM provider performs a native web search to find relevant sources (no separate search service is used).
  • The LLM generates the context note using the post content and its web search results, all within a single API call via our backend.

What We Do NOT Collect

  • No user accounts or identifiers
  • No cookies or cross-site tracking
  • No browsing history beyond explicitly analyzed posts
  • No data is sold or shared with third parties

Third-Party Services

  • Anthropic / OpenAI / Google — Your API key is used to call the LLM provider you selected. Web search is performed natively by the LLM provider (Anthropic web search tool or OpenAI web search) to find sources — no separate search service is used. Their privacy policies apply to those API calls.
  • Cloudflare Workers — Our backend runs on Cloudflare. Cloudflare's privacy policy applies to infrastructure.

Data Storage

All user settings (API keys, language preference) are stored locally in chrome.storage.local. Server-side cache uses Cloudflare KV. Cache entries contain only the context note and source URLs, keyed by a SHA-256 hash of the post URL. No personally identifiable information is stored.

Your Rights

You can clear all local data by removing the extension. Cache entries expire automatically after 72 hours.

Changes

We may update this policy. Changes will be posted on this page with an updated date.

Contact

Questions? Reach out at hello@contexly.io