{"slug": "show-hn-airmailai-a-byok-llm-chat-app-with-a-browser-extension-backend", "title": "Show HN: AirmailAI, a BYOK LLM chat app with a browser extension backend", "summary": "AirmailAI launched as an open-source, bring-your-own-key (BYOK) LLM chat app that runs as a browser extension backend on desktop Chromium-based browsers such as Chrome, Edge, and Brave. The app supports OpenAI, Anthropic, Google, and OpenRouter APIs in one chat UI, with file upload and web search, and routes chats and API keys directly from the user's browser to the provider so conversations never touch AirmailAI servers. AirmailAI charges zero markup, with users paying providers only for the tokens they use.", "body_md": "# Fast. Secure. Private.\n\nBring your own API keys and chat with frontier AI like ChatGPT, Claude, Gemini, and more.\n\nOpen source. Requires a desktop Chromium-based browser such as Chrome, Edge, or Brave.\n\nOpen AirmailAI on a desktop Chromium-based browser to try the demo or start chatting.\n\n## Why AirmailAI?\n\n### Privacy by design\n\nYour chats and keys travel directly from your browser to your provider. Conversations never touch AirmailAI servers.\n\n### Providers and tools\n\nAirmailAI supports OpenAI, Anthropic, Google, and OpenRouter APIs all in one chat UI. Upload files and search the web.\n\n### Pay as you go\n\nYou only pay providers for the tokens you actually use. AirmailAI adds zero markup.\n\n## Send your first message.\n\n                    Follow\n                    [@airmailai](https://x.com/airmailai)\n                    for updates.", "url": "https://wpnews.pro/news/show-hn-airmailai-a-byok-llm-chat-app-with-a-browser-extension-backend", "canonical_source": "https://airmailai.net/", "published_at": "2026-09-15 17:11:01+00:00", "updated_at": "2026-09-15 17:21:11.678121+00:00", "lang": "en", "topics": ["ai-products", "ai-tools", "large-language-models", "generative-ai", "developer-tools"], "entities": ["AirmailAI", "OpenAI", "Anthropic", "Google", "OpenRouter", "Chrome", "Edge", "Brave"], "alternates": {"html": "https://wpnews.pro/news/show-hn-airmailai-a-byok-llm-chat-app-with-a-browser-extension-backend", "markdown": "https://wpnews.pro/news/show-hn-airmailai-a-byok-llm-chat-app-with-a-browser-extension-backend.md", "text": "https://wpnews.pro/news/show-hn-airmailai-a-byok-llm-chat-app-with-a-browser-extension-backend.txt", "jsonld": "https://wpnews.pro/news/show-hn-airmailai-a-byok-llm-chat-app-with-a-browser-extension-backend.jsonld"}}