Show HN: Spraff – Voice and text AI chat, self-hostable, no data retention (github.com)

Spraff has launched a self-hostable AI chat application that allows users to communicate via voice and text without any data storage or subscription fees. Utilizing an OpenRouter account, users can access the service on a pay-as-you-go basis, with minimal costs as most conversations amount to just a fraction of a cent. Spraff is built on the Gemini 3 Flash model through Google Vertex, which ensures zero data retention—meaning no conversational data is saved, just basic metadata like timestamps. Users can either host the application locally or access it through a user-friendly website. This development is significant for the AI/ML community as it emphasizes the increasing demand for privacy-preserving AI solutions. Spraff stands out for its ability to provide quality audio input while maintaining strict data retention policies, which is rare among current AI models. While OpenAI's offerings like GPT-4o Audio provide audio capabilities, they do not ensure zero data retention. Moreover, Spraff encourages local deployment with access to high-quality, free voices that enhance the user experience without compromising data security, marking a notable shift towards more private, user-controlled AI interactions.