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Tool
Category
Pricing
Free?
Updated
Amazon Bedrock Agents
AI Agents
Paid
—
Mar 2026
→
AWS-native AI agent builder using foundation models with enterprise security
Best for: AWS
Hugging Face Agents
AI Agents
Free
✓
Mar 2026
→
Agent framework built into Hugging Face Transformers for model-powered tool use
Best for: Hugging Face
Humanloop
AI Agents
Freemium
✓
Mar 2026
→
Collaborative platform for prompt management, evaluation, and LLM fine-tuning
Best for: prompt-management
Semantic Kernel
AI Agents
Free
✓
Mar 2026
→
Microsoft SDK for building AI agents with plugins and memory
Best for: semantic-kernel
ControlFlow
AI Agents
Free
✓
Mar 2026
→
Python framework for building structured, controllable AI workflows
Best for: controlflow
Rasa
AI Agents
Freemium
✓
Mar 2026
→
Open-source conversational AI framework for building contextual dialogue agents
Best for: open-source
Portkey AI
AI Agents
Freemium
✓
Mar 2026
→
AI gateway providing unified LLM access with reliability features and observability
Best for: AI-gateway