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AI · July 23, 2025

Captain

Navigate knowledge at scale - an Agentic alternative to RAG

Captain launched on July 23, 2025 with 17 votes, #854 of 9,224 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.

What it does

Captain is a truly scalable, no-code data platform for DEEP KNOWLEDGE SEARCH across uploaded sources. We're launching Captain for FREE under open beta this Wednesday, so you can talk to your documents, automate retrieval workflows, and centralize everything!

Self-tuning file search for AI agents. Captain syncs scanned DOCX, complex PDFs, and video from sources like S3, SharePoint, and Google Drive, and makes complex files searchable with one API call, self-tuned towards your accuracy and latency targets.

The complete file search platform. Synced with cloud storage, fast and accurate, and optimized for complex retrieval. Powerful ingestion and self-tuning retrieval, behind one query API, ready for production scale. Powerful ingestion and self-tuning retrieval, behind one query API, ready for production scale. Every layer above ships together, on one index. Nothing to wire and nothing to keep aligned. Sub-second queries through a deterministic API, with filters, rerank and candidate depth all yours to configure. Keep search in line with ever-changing data. One MCP tool call runs evals on your own files and tunes retrieval toward your targets. Index what DIY RAG can’t: scans, handwriting,…from captain.dev

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