pathwaycom/pathway
Pathway is a Python ETL framework for stream processing, real-time analytics, and LLM pipelines. Powered by a high-performance Rust engine based on Differential Dataflow, it handles incremental computation so your RAG pipelines stay fresh as source data changes — without re-processing everything from scratch. Integrates natively with LangChain, LlamaIndex, and vector databases.
Why It Matters
Most RAG systems break when source data changes because they rely on batch re-indexing. Pathway solves this with true incremental computation — only processing what changed. This makes it the go-to choice for teams building production RAG that needs real-time freshness. The Rust-powered engine delivers performance that pure Python frameworks cannot match, processing millions of events per second on commodity hardware.