Meltdown, a Python-based LLM client with custom widgets, offers free personal use and paid commercial licenses starting at $249 per seat.

Meltdown replaces embedded browsers with fully custom widgets built in Python and Tkinter, including a markdown engine created from scratch, enabling multi-model sessions, file uploads, and tools like web search, image creation, and persistent memory.

The platform supports local servers, ChatGPT, Gemini, Claude, Kimi, and OpenRouter; runs lighter on CPU and RAM than Electron-based alternatives; includes 23 languages (English, Spanish, Russian, Japanese, Italian, French, German, Chinese, Vietnamese, Korean, Portuguese, Turkish, Hindi, Polish, Indonesian, Norwegian, Swedish, Dutch, Icelandic, Danish, Finnish, Swahili, Quechua); and has no telemetry.

Personal and educational use is free; commercial use requires a paid license starting at $249 per seat for individuals and small teams, with volume discounts and site/enterprise licenses available.