Best Langflow Alternatives in 2026

Dify is an Apache 2.0 open-source platform for building production-ready LLM applications. Visual workflow canvas, RAG pipelines, agent builder, and 100+ model integrations. Free self-hosted or $59/mo on cloud.

Flowise is an open-source, drag-and-drop builder for LLM workflows and AI agents. Self-host it free under Apache 2.0 or use the managed cloud. 52,000+ GitHub stars, acquired by Workday in August 2025.

Genkit is Google's open-source AI framework for TypeScript, Go, and Python developers. It provides typed flows, RAG, tool calling, and multi-agent support with a standout local Developer UI for iterating prompts and debugging traces. Free under Apache 2.0.

Mastra is an open-source TypeScript framework for building production AI agents, from the team behind Gatsby. It ships agents, durable workflows, RAG, built-in memory with SOTA LongMemEval scores, and a visual debugging studio.

Haystack is deepset's open-source Python framework for building production-ready RAG pipelines and AI agents. Apache 2.0 licensed, it gives developers explicit control over retrieval, context routing, and generation through composable, YAML-serializable pipeline graphs.

RAGFlow is InfiniFlow's open-source enterprise RAG engine, built around a neural document parser (DeepDoc) that handles complex PDFs, tables, and mixed-layout documents. Self-hostable, Apache 2.0, with 79k+ GitHub stars.

PydanticAI is an open-source Python framework for building production-grade AI agents. Created by Samuel Colvin (creator of Pydantic), it brings FastAPI-style type safety, structured outputs, and dependency injection to agent development. Free, MIT-licensed, 16k+ GitHub stars.

LlamaIndex is an open-source data framework for building RAG applications over private data, developed by LlamaIndex, Inc. It includes 300+ data connectors, built-in hierarchical chunking, and LlamaParse for enterprise-grade document parsing. Free OSS core; LlamaCloud starts at $50/mo.

LangChain is the most widely adopted open-source framework for building LLM agents and RAG systems, with 135,000+ GitHub stars. Its October 2025 1.0 release brought stability guarantees, but persistent abstraction overhead and a paid LangSmith dependency make the calculus complicated.

LangGraph is an open-source Python framework by LangChain for building production-grade AI agents as stateful directed graphs. It provides durable execution, built-in checkpointing, and human-in-the-loop controls used in production by Klarna, LinkedIn, and Uber.