Top alternatives to LlamaIndex

LlamaIndex is a open source in AI Agent. Here are the strongest alternatives, ranked by an explainable 4-dimension score.

● Data-backed · 525 nodes · updated 2026-09-13
#AlternativeOverallPop.Mom.Cred.Eco.
1Flowise · Agent Frameworks
Open-source drag-and-drop builder for LLM and agent flows.
7547908684
2Langflow · Agent Frameworks
Visual low-code tool for building and prototyping LLM and agent workflows.
7545908785
3Letta · Agent Frameworks
Framework for building stateful agents with long-term memory, born from MemGPT research.
7549908482
4SmolAgents · Agent Frameworks
Lightweight library for building agents that write and execute code.
8785938482
5deer-flow · Agent Frameworks
An open-source long-horizon SuperAgent harness that researches, codes, and creates. With the help of sandboxes, memories, tools, skill, subagents and message gateway, it handles different levels of tasks that could take minutes to hours.
8674998685
6Semantic Kernel · Agent Frameworks
Microsoft's open-source SDK for integrating LLMs and agent orchestration into apps.
8484768989
7Goose · Agent Frameworks
Block's open-source extensible AI agent that automates engineering tasks locally.
8474938584
8PydanticAI · Agent Frameworks
Type-safe Python agent framework from the Pydantic team.
8374938381
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