Agent Lightning alternatives
6 agents tools in the same lane as Agent Lightning, ranked by editorial score.
OA
OpenAI Agents SDK (Python)
Agents · GPT-4o / GPT-4.1 / gpt-realtime (provider-pluggable via LiteLLM)
A lightweight Python framework for building multi-agent LLM applications with handoffs, guardrails, and built-in tracing.
Free· SDK is free and open source (MIT-licensed). Cost is pass-through to whichever model provider you point it at — OpenAI API pricing applies when using GPT models; third-party providers billed separately.Multi-agent customer support with specialist handoffsVoice agents using gpt-realtime for phone or in-app calls
AU
AutoGen
Agents · Model-agnostic: OpenAI (GPT-4o, GPT-4.1, o-series), Azure OpenAI, Anthropic Claude, Google Gemini, Ollama, and any OpenAI-compatible local model (vLLM, llama.cpp)
Microsoft's open-source framework for multi-agent AI applications
Free· Free and open-source (MIT/CC-BY-4.0). You pay only for the underlying model providers (OpenAI, Azure OpenAI, Anthropic, local models, etc.) you plug into it.Coder and critic pair programming loopsMulti-agent research and report writing
MA
Mastra
Agents · Multi-model (90+ providers)
8.1
Open-source TypeScript framework for building, deploying, and observing AI agents and workflows.
Freemium· Starter: $0 · Teams: $250 · Enterprise: Custom pricingai-agentsworkflow-orchestration
GA
GenAI Agents (NirDiamant)
Agents · Framework-agnostic; most notebooks default to OpenAI GPT-4 class models, with Ollama and local model examples included.
50+ Jupyter tutorials for building GenAI agents, from a simple chatbot to multi-agent systems.
Free· Free and open source (Jupyter notebooks). Author sells an optional paid course at diamant-ai.com and runs a free newsletter; the repository itself has no paywall.LangGraph multi-agent workflowCustomer support agent
SK
Semantic Kernel
Agents · Multi-model
8.4
Microsoft's open-source SDK for wiring LLMs, plugins, and agents into enterprise .NET, Python, and Java apps.
Free· Free, MIT-licensed SDK; you pay for the underlying model APIsagent-orchestrationllm-plugins
CA
CAMEL-AI
Agents · Multi-model
8.0
Open-source Python framework for building multi-agent systems and synthetic data pipelines.
Free· Free, open-source; pay for the underlying LLM API callsmulti-agent-systemssynthetic-data-generation