Twocast

Twocast is a tool for generating two-person podcast episodes automatically from a piece of content, aimed at creators and researchers who want a quick audio summary without recording anything themselves. It is comparable to Google's NotebookLM podcast feature, but focused specifically on multi-language, two-voice output.

It can generate a 3-to-5-minute podcast with one click from a topic, a link, a document (doc, PDF or text file), or a longer list page that produces a 5-to-9-minute episode, with multi-language support and downloadable audio. Each generated podcast includes the audio itself along with an outline and full script, and it integrates with three text-to-speech and generation backends: Fish Audio, Minimax and Google Gemini, alongside an LLM API for chat and search functionality through providers such as OpenRouter and x.ai.

Twocast can be run locally by configuring environment variables and a PostgreSQL database, or started with a single Docker command. It is written in TypeScript, and the repository metadata does not state a license, so check the repository before relying on it for commercial use; it requires API keys from the chosen TTS and LLM providers, which are billed separately by those providers.