Technical / Code-First Frameworks · Updated 1 August 2026

Top Frameworks

Ranked by real-world demand. As of 1 August 2026, LangChain is the most-sought framework — index 82.2 of 100.

Framework finder

Which agent framework should you use?

There are 25 on the board. Answer 3 quick questions and get the 2–3 that actually fit how you build — not just the most popular.

How these frameworks differ

The board ranks by demand. This map places each tool by low-level / composable → high-level / opinionated and single-agent → multi-agent team, so you can choose by fit, not just popularity.

← Low-level / composable High-level / opinionated → ↑ Multi-agent team ↓ Single-agent Compose your own agents Opinionated crews Low-level single agent Batteries-included LangChain LangChain LangGraph LangGraph LlamaIndex LlamaIndex CrewAI CrewAI Haystack Haystack Spring AI Spring AI Microsoft Agent Framework Microsoft Agent Framework OpenAI Agents SDK OpenAI Agents SDK Google ADK Google ADK Anthropic Claude Agent SDK Anthropic Claude Agent SDK Strands Agents Strands Agents DSPy DSPy Semantic Kernel Semantic Kernel Mastra Mastra Pydantic AI Pydantic AI Letta (MemGPT) Letta (MemGPT) Eliza (elizaOS) Eliza (elizaOS) Agno Agno CAMEL CAMEL smolagents smolagents Atomic Agents Atomic Agents Griptape Griptape OpenAI Swarm OpenAI Swarm Guidance Guidance Marvin Marvin
#ToolIndexDemandGitHub ⭐Searches/mo
1 LangChainThe most widely adopted LLM application toolkit — chains, tools, and hundreds of integrations in Python and JavaScript. 82.2 185k 111k
2 LangGraphGraph-based agent orchestration from the LangChain team — explicit nodes, edges, and state for controllable, inspectable workflows. 67.2 42k 33k
3 LlamaIndexThe data framework for LLM apps — connects agents to your own documents with best-in-class retrieval (RAG). 65.9 54k 13k
4 CrewAIRole-based multi-agent framework — define a crew of cooperating agents and let them divide the work. 61.9 56k 13k
5 HaystackDeepset's production-oriented framework for search, RAG, and agent pipelines. 58.2 26k 4.3k
6 Spring AIBrings LLM and agent patterns to the Spring ecosystem for Java teams. 57.2 9.2k 4.4k
7 Microsoft Agent FrameworkMicrosoft's unified agent framework for Python and .NET — the successor to AutoGen and Semantic Kernel, with graph-based workflows and enterprise plumbing. 56.6 13k 6.6k
8 OpenAI Agents SDKOpenAI's lightweight SDK for building agents, with built-in handoffs, guardrails, and tracing. 52.8 32k 5.4k
9 Google ADKGoogle's Agent Development Kit — Gemini-native, multi-agent by design, wired into Google Cloud. 52.8 21k 9.9k
10 Anthropic Claude Agent SDK~Anthropic's SDK for building agents on Claude — the same harness that powers Claude Code. 52.2 9.4k 9.9k
11 Strands AgentsAWS's model-driven agent SDK — a few lines of Python from prototype to production. 51.5 6.8k 51k
12 DSPyStanford's framework for programming rather than prompting LLMs — it optimises prompts and pipelines automatically. 50.7 37k 5.8k
13 Semantic KernelMicrosoft's enterprise orchestration framework for .NET, Python, and Java — now converging into Microsoft Agent Framework. 50.3 29k 2.4k
14 MastraTypeScript-first agent framework — workflows, RAG, and evals with a strong developer experience. 46.9 27k 1.6k
15 Pydantic AIType-safe agent framework from the Pydantic team — structured, validated outputs built in. 46.5 19k —
16 Letta (MemGPT)Agents with persistent, self-editing memory — grown out of the MemGPT research — that learn across sessions. 44.0 24k 1.9k
17 Eliza (elizaOS)TypeScript framework for autonomous character agents, popular for social and web3 personas. 43.9 19k 720
18 AgnoFast, lightweight framework for multimodal, multi-agent systems with built-in memory and knowledge. 42.8 42k 2.7k
19 CAMEL~Research-driven multi-agent framework for building and studying communicating, role-playing agent societies. 40.7 18k 2.5k
20 smolagentsHugging Face's minimal agent library — agents that think in code, in about a thousand lines. 38.7 29k 1.6k
21 Atomic AgentsModular, schema-first framework for composing predictable agent pipelines from small parts. 37.2 6.1k 390
22 GriptapePython framework for secure, structured agent workflows with off-prompt data handling. 36.1 2.6k 1.4k
23 OpenAI SwarmOpenAI's experimental, educational framework for lightweight multi-agent handoffs — superseded by the Agents SDK. 36.0 22k 480
24 Guidance~Constrained-generation library that steers model output with grammars and templates instead of free text. 32.0 22k 20
25 Marvin~Prefect's lightweight toolkit for turning LLM calls into typed, reliable Python functions. 31.5 6.2k 456

Index = market demand (search + AI demand) weighted most heavily, then adoption, real usage, momentum, production-readiness and community. ◇ proprietary / closed-source (no public repo — scored on demand). ~ demand estimated from product-site traffic. Methodology → · All boards →

Common questions

Top Frameworks — frequently asked questions

What is the best framework right now?

As of 1 August 2026, LangChain is the most-sought framework on the Agent Reality Index, scoring 82.2 of 100. "Best" here means the strongest real-world demand and adoption rather than an editorial pick — the full board ranks the top 25.

How is the Frameworks ranking calculated?

Each tool gets a 0–100 score weighted most heavily toward real-world market demand (search and AI-search volume), then developer adoption, real usage, momentum, production-readiness, and community — rather than GitHub stars or vendor claims.

How many frameworks are ranked, and how often is the board updated?

The board ranks 25 frameworks and is rebuilt monthly from fresh demand and adoption data. It was last updated 1 August 2026.