✓
Tool
Category
Pricing
Free?
Updated
Cassidy AI
AI Agents
Freemium
✓
Mar 2026
→
Team AI workspace with knowledge-trained agents integrated into business tools
Best for: team-AI
Relevance AI
AI Agents
Freemium
✓
Mar 2026
→
No-code platform for building and deploying AI agent teams for business
Best for: agents
Wordware
AI Agents
Freemium
✓
Mar 2026
→
Collaborative AI IDE for building agents and workflows in a document-like interface
Best for: AI-IDE
Microsoft Copilot Studio
AI Agents
Freemium
✓
Mar 2026
→
Low-code platform for building custom Microsoft Copilot AI agents for business
Best for: Microsoft
Questflow
AI Agents
Freemium
✓
Mar 2026
→
Natural language multi-agent workflow platform for business automation
Best for: multi-agent
Rasa
AI Agents
Freemium
✓
Mar 2026
→
Open-source conversational AI framework for building contextual dialogue agents
Best for: open-source
Voiceflow
AI Agents
Freemium
✓
Mar 2026
→
Collaborative platform for designing and deploying voice and chat AI agents
Best for: voice-agents
Thoughtly
AI Agents
Freemium
✓
Mar 2026
→
AI voice agent platform for building phone agents for sales and support
Best for: voice-agent
Langfuse
AI Agents
Freemium
✓
Mar 2026
→
Open-source LLM observability platform for tracing, debugging, and monitoring AI agents
Best for: observability
LangSmith
AI Agents
Freemium
✓
Mar 2026
→
Developer platform for debugging and monitoring LangChain-based AI agent applications
Best for: LangChain
Helicone
AI Agents
Freemium
✓
Mar 2026
→
Open-source LLM proxy for logging, monitoring, and analyzing all AI API calls
Best for: LLM-proxy
Portkey AI
AI Agents
Freemium
✓
Mar 2026
→
AI gateway providing unified LLM access with reliability features and observability
Best for: AI-gateway
Braintrust
AI Agents
Freemium
✓
Mar 2026
→
Enterprise AI evaluation platform for logging, testing, and improving agent quality
Best for: evaluation
Humanloop
AI Agents
Freemium
✓
Mar 2026
→
Collaborative platform for prompt management, evaluation, and LLM fine-tuning
Best for: prompt-management
PromptLayer
AI Agents
Freemium
✓
Mar 2026
→
Prompt management platform with logging and analytics for LLM API calls
Best for: prompt-management
Weights & Biases Weave
AI Agents
Freemium
✓
Mar 2026
→
W&B toolkit for tracing, evaluating, and improving AI agent applications
Best for: W&B