AgentStackWatch
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Tracker

Dev frameworks & SDKs

Libraries for building agents in code.

ProductPricingVersionStarsDownloads / wk26-week trend
LangGraph✓LangChain Free / open source 1.2.1643.4k 12.2M
Pydantic AI✓Pydantic Free / open source 2.57.020.7k 1.4M
OpenAI Agents SDK✓OpenAI Free / open source 0.24.030.1k 3.0M
Claude Agent SDK✓Anthropic Free / open source 0.2.1688.3k 7.6M
Google ADK✓Google Free / open source 2.12.021.9k 2.2M
CrewAI✓CrewAI Free / open source 1.15.2859.8k 633.5k
Mastra✓Mastra Free / open source 1.78.028.9k 2.2M
Vercel AI SDK✓Vercel Free / open source 7.0.14327.4k 31.0M
LlamaIndex✓LlamaIndex Free / open source 0.14.2552.5k 664.2k
Haystack✓deepset Free / open source 3.4.026.8k 131.3k
Letta✓Letta Free / open source 0.16.825.2k — —
DSPy✓Stanford NLP Free / open source 3.4.138.7k 1.2M
smolagents✓Hugging Face Free / open source 1.26.029.9k 123.1k
Browser Use✓Browser Use Free / open source 0.13.11118.2k 1.7M
OpenHands✓OpenHands (formerly All Hands AI) Free / open source 1.27.191.1k — —
Goose✓unknown Free / open source 1.55.055.4k — —