Flowsend (Castmagic)

Flowsend was an AI workflow for repurposing audio and video into written content. The product continues as Castmagic — an AI-powered content operating system for creators, agencies, and marketing teams. Import media from YouTube, Zoom, RSS feeds, Instagram, and 1,800+ platforms or upload files directly; Castmagic transcribes with speaker labels, trains on your brand voice, and generates show notes, blog posts, social threads, newsletters, video scripts, and campaign assets from a single recording. Features include semantic search across your entire media library, multi-brand workspaces with team permissions, campaign builders, commenting and approval flows, and integrations that let Claude search and cite your transcripts. Teams report dramatically faster repurposing — turning one recording into a full cross-channel content pack without manual transcription and rewriting.