Home › Best AI tools › AI Agents & Frameworks
Best AI Tools for Building ai agents (103 options)
103 tools for building AI agents in the directory. Frameworks, platforms and memory layers for building AI agents.
How to read this page. We do not rank tools or publish scores. This page lists every AI Agents & Frameworks tool in the directory with its official link and pricing model so you can shortlist, then try the ones that fit. Pricing labels come from each vendor's pricing page when we could confirm them; "See site" means we could not.
At a glance
- 103 tools listed; 31 free to use, 24 with a free tier, 6 paid, 42 where pricing is not confirmed here.
- With a free plan or tier: AG2, Agency Swarm, Agentic Fabriq, Agno, Atomic Agents, AutoGen, BabyAGI, Beam.win, Busabase, CAMEL-AI, ChatDev, Cognee, Composio, CopilotKit, DSPy, Dust, Flowith, Genkit, Gooey.AI, Google Agent Development Kit, Goose, Graphiti, GraphRAG, Haystack, Kotaemon, Langbase, LangChain, LangChain4j, Langroid, Letta, LightRAG, LlamaIndex, Lyzr, Mastra, MetaGPT, Microsoft Agent Framework, MindStudio, OneCLI, OpenAI Agents SDK, Opengeni, OpenManus, OWL, PraisonAI, Pydantic AI, R2R, Rerun, Semantic Kernel, Sim, smolagents, Spring AI, Strands Agents, Supermemory, TaskWeaver, VoltAgent, Zep.
What to look for
Decide between a hosted product and a framework you run yourself, and check how each handles tool access, memory and monitoring.
All 103 tools
| Tool | What it does | Pricing | Link |
|---|---|---|---|
| AG2 | Open-source multi-agent framework that grew out of the original AutoGen project. | Free | Official site |
| Agency Swarm | Open-source framework for building collaborative multi-agent systems on the OpenAI Agents SDK. | Free | Official site |
| Agent 37 | Hosts always-on AI agents behind one API with persistent files, billed per minute. | See site | Official site |
| Agentic Fabriq | Control plane for managing AI agents. | Freemium | Official site |
| AgentOps | Observability and monitoring for AI agents. | See site | Official site |
| AgentScope | Open-source multi-agent framework from Alibaba for building agent applications. | See site | Official site |
| Agno | Framework and runtime for building multi-agent systems. | Freemium | Official site |
| Amazon Bedrock AgentCore | AWS services for deploying and operating AI agents at scale. | See site | Official site |
| Amazon Quick | AWS agentic AI assistant for work (Quick Suite) that combines research, BI dashboards and automation across your tools. | See site | Official site |
| Atomic Agents | Lightweight, modular Python framework for building AI agents. | Free | Official site |
| AutoGen | Microsoft's open-source framework for building multi-agent applications. | Free | Official site |
| AutoGPT | Open-source platform for building and running autonomous AI agents. | See site | Official site |
| BabyAGI | Experimental framework for self-building autonomous agents. | Free | Official site |
| Beam.win | Run AI agents on one Mac and use its windows on another. | Freemium | Official site |
| BeeAI | Open-source platform for discovering and running AI agents. | See site | Official site |
| Busabase | Structured records and human review for agent output, with self-host option. | Freemium | Official site |
| CAMEL-AI | Open-source community and framework for multi-agent research. | Free | Official site |
| Cassidy | AI automation platform for building agents and workflows on company knowledge. | See site | Official site |
| ChatDev | Open-source multi-agent collaboration for software development. | Free | Official site |
| Claude Agent SDK | Anthropic's SDK for building agents on the same tools and agent loop that power Claude Code. | See site | Official site |
| Cognee | Open-source memory layer for AI agents that combines knowledge graphs and vector search, self-hosted or in the cloud. | Freemium | Official site |
| Composio | Tool integration platform that connects AI agents to apps and APIs. | Freemium | Official site |
| CopilotKit | Open-source framework for adding in-app AI copilots and agentic UIs. | Freemium | Official site |
| Coze | ByteDance platform for building and deploying AI agents and bots without code. | See site | Official site |
| CrewAI | Framework and platform for orchestrating teams of role-playing AI agents. | See site | Official site |
| DSPy | Framework for programming rather than prompting language models. | Free | Official site |
| Dust | Platform for building, sharing and running AI agents connected to company knowledge and tools. | Freemium | Official site |
| Ema | Universal AI employee platform with agents for enterprise workflows. | See site | Official site |
| Empyre | Platform where specialised AI agents build, launch and operate a software business from a plain-language description. | Paid | Official site |
| Fetch.ai | Platform and framework for building and discovering autonomous AI agents. | See site | Official site |
| Flowith | Canvas-based AI workspace with an agent for long multi-step research and creation tasks. | Freemium | Official site |
| Gemini Enterprise | Google Cloud's platform for building and using AI agents at work (formerly Agentspace). | See site | Official site |
| Genkit | Open-source framework from Google for building AI-powered apps in JavaScript, Go and Python. | Free | Official site |
| Gooey.AI | Low-code platform for building AI workflows and copilots. | Freemium | Official site |
| Google Agent Development Kit | Google's open-source toolkit for building and deploying AI agents. | Free | Official site |
| Goose | Open-source, extensible AI agent that runs locally, uses MCP extensions and can automate coding and other tasks. | Free | Official site |
| Graphiti | Open-source library for building temporal knowledge graphs for agents. | Free | Official site |
| GraphRAG | Microsoft open-source graph-based retrieval-augmented generation system. | Free | Official site |
| Grep AI | Creates AI agents and agent swarms to research businesses, check information, and automate repetitive workflows through an API or MCP. | Free trial | Official site |
| Griptape | Framework and cloud for building AI agents and workflows. | See site | Official site |
| Haystack | Open-source framework from deepset for building search, RAG and agent pipelines. | Free | Official site |
| Hob | Open-source on-device alternative to hosted AI coworkers. | See site | Official site |
| Inkbox | Identity and communication layer (email, phone) for AI agents. | See site | Official site |
| Inngest AgentKit | TypeScript framework from Inngest for building multi-agent networks. | See site | Official site |
| InstaBox | Cloud computers for AI agents. | See site | Official site |
| Kimi Hosted Agents | Managed cloud runtime from Moonshot AI (Harness as a Service) for long-horizon multi-agent workloads. | See site | Official site |
| Kore.ai | Enterprise agent platform for AI in customer service, employee support and process automation. | See site | Official site |
| Kotaemon | Open-source RAG UI for chatting with documents. | Free | Official site |
| Langbase | Serverless platform for building, deploying and scaling AI agents with memory and tools. | Freemium | Official site |
| LangChain | Open-source framework and company for building LLM-powered applications and agents. | Freemium | Official site |
| LangChain4j | Open-source Java library for building LLM-powered applications and agents. | Free | Official site |
| LangGraph | Framework for building stateful, controllable multi-step agents. | See site | Official site |
| Langroid | Python framework for building multi-agent LLM applications. | Free | Official site |
| Letta | Platform for building stateful agents with long-term memory. | Freemium | Official site |
| LightRAG | Open-source simple and fast retrieval-augmented generation. | Free | Official site |
| Living Brain | Interoperable memory layer for agentic AI, with a no-code workspace. | See site | Official site |
| LlamaIndex | Framework and cloud services for building agents over your own data. | Freemium | Official site |
| Lyzr | Enterprise platform and framework for building and running AI agents. | Freemium | Official site |
| Manus | General-purpose autonomous AI agent. | See site | Official site |
| Marblism | AI employees for small businesses that handle inbox, social media, SEO, calls and lead generation. | See site | Official site |
| Mastra | TypeScript framework for building AI agents and workflows. | Freemium | Official site |
| Mem0 | Memory layer for AI agents and applications. | See site | Official site |
| MetaGPT | Open-source multi-agent framework that assigns software-team roles to cooperating AI agents. | Free | Official site |
| Microsoft Agent Framework | Microsoft's open-source SDK for building AI agents and multi-agent workflows in Python and .NET. | Free | Official site |
| Microsoft Copilot Studio | Low-code platform for building custom copilots and agents. | See site | Official site |
| MindStudio | No-code platform for building and deploying AI agents and workflows using many models. | Freemium | Official site |
| OneCLI | AI teammates that work across business tools from Slack, with scoped permissions, human approvals, and activity logs. | Freemium | Official site |
| OpenAI Agents SDK | OpenAI's lightweight Python framework for multi-agent workflows. | Free | Official site |
| Opengeni | Infrastructure for shipping AI agents quickly. | Freemium | Official site |
| OpenMail | Gives AI agents an email identity so they can send and receive mail. | See site | Official site |
| OpenManus | Open-source general AI agent framework. | Free | Official site |
| Orgo | Secure, always-on Linux, Windows and Mac cloud computers for AI agents. | See site | Official site |
| OWL | Open-source multi-agent framework for real-world task automation. | Free | Official site |
| Pallet | AI agents for logistics operations. | Paid | Official site |
| PraisonAI | Open-source low-code framework for building multi-agent systems. | Free | Official site |
| Pydantic AI | Python agent framework from the Pydantic team focused on type safety. | Free | Official site |
| R2R | Open-source agentic retrieval system with a RESTful API. | Free | Official site |
| RAGFlow | Open-source RAG engine based on deep document understanding, with agent workflows. | See site | Official site |
| Rasa | Platform and open-source framework for building conversational AI assistants. | See site | Official site |
| Relevance AI | Platform for building and managing teams of AI agents without code. | See site | Official site |
| Rerun | No-code agents that run 24/7 with human approval and a private server. | Freemium | Official site |
| Rivet | Open-source visual programming environment for building AI agents with LLMs. | See site | Official site |
| Salesforce Agentforce | Salesforce's platform for building and deploying AI agents on CRM data. | See site | Official site |
| Semantic Kernel | Microsoft's SDK for integrating AI models and agents into applications. | Free | Official site |
| Sim | Open-source visual builder for AI agent workflows. | Freemium | Official site |
| Simular | AI agent that operates a computer's desktop apps and browser to carry out tasks. | See site | Official site |
| Skywork | AI agent workspace that turns prompts into documents, slides and spreadsheets with deep research. | See site | Official site |
| smolagents | Hugging Face's minimal library for building agents that write code. | Free | Official site |
| Spring AI | Spring framework project for building AI applications in Java. | Free | Official site |
| Strands Agents | Open-source SDK from AWS for building AI agents in Python and TypeScript with a model-driven approach. | Free | Official site |
| SuperAGI | AI-native sales and marketing platform with autonomous agents; also known for an open-source agent framework. | See site | Official site |
| Supermemory | Memory API and app for AI. | Freemium | Official site |
| Swarms | Framework and platform for enterprise multi-agent orchestration. | See site | Official site |
| Tasklet | Creates always-on AI agents that connect to business tools and run tasks and scheduled workflows across a team. | Free trial | Official site |
| TaskWeaver | Microsoft open-source code-first agent framework for data analytics tasks. | Free | Official site |
| Teamily AI | Messenger where personal agents, agent teams and people work together. | See site | Official site |
| Twin | AI agents that automate tasks across web apps. | Free trial | Official site |
| UnleashX | AI workforce platform that turns conversations into completed outcomes. | Paid | Official site |
| Vercel AI SDK | TypeScript toolkit for building AI-powered applications and agents. | See site | Official site |
| VoltAgent | Open-source TypeScript framework for building AI agents, with an observability console. | Freemium | Official site |
| Wordware | Platform for building AI agents using natural-language programs. | See site | Official site |
| Yutori | Company building computer-use models and web agent APIs that browse and act on websites. | See site | Official site |
| Zep | Context engineering and memory platform for AI agents. | Freemium | Official site |
Related guides
- Alternatives to Busabase
- Alternatives to LangChain
- Alternatives to Mem0
- Alternatives to Rerun
- Alternatives to Teamily AI
- LangChain vs LlamaIndex
- Mem0 vs Zep
- CrewAI vs LangGraph
- AutoGen vs CrewAI
- LangGraph vs OpenAI Agents SDK
- Coze vs Dify
- Mastra vs Vercel AI SDK
- Scalekit vs Composio
- Busabase vs Mem0
- Teamily AI vs Rerun
- beacon.sh vs Mem0
Browse the AI Agents & Frameworks category · All best-of guides