AI Tools Directory · Agents
Where AI moves from chat to action.
n8n is our default for production workflows, LangGraph when we need code-level control. Custom agent builds typically start in our Custom Deployments service — these tools are too operationally important to hack on without a proper runbook.
7 tools we recommend
All categories →Vapi
PaidDeveloper-first platform for building voice AI agents that make and take phone calls. Usage-based, per-minute pricing
Dify
FreemiumSource-available, self-hostable platform for LLM apps and agents. Visual workflows, RAG, and agents in one package
Retell AI
PaidVoice-agent platform to build, test, and deploy phone agents. Per-minute pricing with generous free concurrency
n8n
FreemiumOpen-source workflow automation with first-class LLM + vector-DB nodes. Self-host or use their cloud
LangGraph
FreeCode-level framework for building multi-step, stateful LLM agents. The serious engineer's choice for agent orchestration
CrewAI
FreeRole-based multi-agent framework. Spin up a planner-researcher-writer crew in ~30 lines of Python
Lindy
FreemiumNo-code agent builder with 1,600+ integrations. The pragmatic answer when LangGraph is overkill but Zapier can't express the logic