ThunderAI: ChatGPT, Gemini, Ollama in Thunderbird (addons.thunderbird.net)

ThunderAI is a new Thunderbird add-on that brings LLM-powered writing, editing and automation directly into the email client. It lets users define custom prompts and supply extra data so models can draft, correct, optimize and tag emails, plus create calendar events and tasks. With API integration it can also auto-tag messages and perform spam analysis/filtering, speeding routine workflows and improving message quality without leaving Thunderbird. Technically, ThunderAI supports multiple backends — including ChatGPT (usable without an API key via a free account), OpenAI API (with an API key), and local/OpenAI‑compatible servers such as Ollama or LM Studio — giving users a choice between cloud convenience and on‑device privacy. Key features: customizable prompt templates, additional-data context for more accurate replies, automatic tagging and filtering when connected to an API, and local LLM support for data-sensitive environments. For AI/ML practitioners and power users this is notable because it packages model-driven email automation and classification into a mainstream client, offering practical testbeds for prompt engineering, privacy trade-offs, and lightweight automation of email triage. Issues and requests are tracked on GitHub.