Captain: RAG Frameworks

Captain is an API-first RAG platform that lets teams search large collections of unstructured documents — PDFs, S3 files, spreadsheets, scanned images — in plain English with just two API calls. Part of YC W2026, the company was founded by Lewis Polansky (CEO) and Edgar Babajanyan (CTO), who brings 4 years of experience scaling high-performance RAG pipelines.

The platform handles the entire ingestion pipeline automatically: OCR via Gemini 3 Pro, complex document parsing via Reducto, chunking, and embedding generation using Voyage AI contextualized embeddings. It employs hybrid retrieval combining dense embeddings with full-text search via reciprocal rank fusion, then re-ranks with Voyage rerank-2.5. Captain tops the Open-RAG-Benchmark with over 20% higher accuracy than standard RAG pipelines.

Captain integrates with 1,000+ data sources including S3, SharePoint, Google Drive, Confluence, Slack, and Notion. It includes role-based governance with granular metadata-based access control and is SOC 2 Type II certified. The platform provides managed vector storage, so teams don't need an external vector database.