Presenton is an open-source AI presentation generator built for the teams that cannot, or will not, route slide content through a third-party cloud. You bring a PPTX or PDF as a template, point it at your LLM of choice, and it generates full decks that inherit your colors, fonts, and layout — exported as editable PPTX or PDF. The API is the core value proposition for developers: one endpoint to generate or update a deck from your data pipeline. The visual editor covers prompt-based editing and slide variants, but the docs describe it as lacking the elaborate editing controls designers expect. Teams hitting that ceiling handle final polish in PowerPoint or Google Slides after generation.