Fathom Layer shortlist
Best Agent Frameworks (2026)
5 entries, ordered by one measurable criterion: how many of their facts we have confirmed against a cited source, most often the maker's own pages. More verified facts rank higher; ties go to the most recently confirmed. This is not a quality score, and affiliate payouts never change the order. See how the index works.
- 1
AutoGPT
0Not yet verified
The original autonomous AI agent.
Specs & sources → - 2
Devin
Not yet verified
The first fully autonomous AI software engineer capable of planning and executing complex code workflows.
Specs & sources → - 3
LangChain
Open Source
Not yet verified
The most popular and versatile orchestration framework for LLMs.
Specs & sources → - 4
LlamaIndex
0Not yet verified
Data framework for LLM applications.
Specs & sources → - 5
Mastra
Open Source
Not yet verified
Opinionated, strongly-typed agent framework for Next.js and TypeScript.
Specs & sources →
Looking for the full field? Browse every agent frameworks in the index.