Supavec is an open-source alternative to Carbon.ai that enables developers to build RAG applications with any data source at scale. It provides vector search optimization with configurable chunking and overlap, hybrid filtering combining file_id and cosine similarity for P95 210ms performance, and batch embeddings to reduce OpenAI costs. The platform offers a multi-tenant architecture with row-level security and usage-based billing, and integrates PostHog for real-time analytics and observability.