LangExtract alternatives
6 rag tools in the same lane as LangExtract, ranked by editorial score.
ON
OneKE
RAG · Multi-model (OneKE-13B, LLaMA3, Qwen2.5, GPT, DeepSeek-R1)
7.2
Open-source multi-agent framework for schema-guided knowledge extraction from documents.
Free· Free, MIT-licensed; you pay for LLM API calls or self-hosted computeknowledge-graph-constructionnamed-entity-recognition
UI
Unstructured.io
RAG · In-house layout and table models plus optional OpenAI / Anthropic / Bedrock embeddings and enrichment
Turn unstructured enterprise documents into LLM-ready data
Freemium· Free: Free · Pay-As-You-Go: $0.03 / page · Business: CustomRAG document ingestionPDF and PPTX parsing
DO
Docling
RAG · GraniteDocling 258M and other vision-language models
Open-source document parsing for AI: PDFs, Office files, audio and video into clean, structured Markdown/JSON
Free· Free and open source under MIT License. Hosted by the LF AI & Data Foundation; no paid tiers.RAG document ingestionPDF table extraction
OP
OpenDataLoader PDF
RAG
7.1
Open-source PDF parser built for RAG pipelines, with reading-order detection, table extraction, and bounding-box citations.
Freemium· Free (Apache 2.0); enterprise tier for PDF/UA export and visual editorpdf-parsingrag-preprocessing
PR
PrivateGPT
RAG · Multi-model (BYO local LLM)
7.0
Production-ready, air-gapped RAG framework for querying your documents with local LLMs.
Freemium· OSS free; Zylon enterprise contract (contact sales)private-ragchat-with-documents
AI
aiPDF
RAG
6.8
Chat-with-your-documents app that ingests PDFs, EPUBs, web pages and YouTube videos with cited answers.
Freemium· Playful: Free · Dynamic: $9/month · Flagship: $19/monthdocument-chatpdf-summarization