Automation tools chain. Aerostack orchestrates.
Workflows that
pause for humans.
14 node types. Identity verification before sensitive actions. Human approval handoffs that notify reviewers and resume on approval. Bot-to-bot delegation across workspaces. Not a Zapier clone — a workflow engine built for AI agents.
Three generations of automation.
Only one trusts humans.
AI-Native Orchestration
Identity. Humans. AI. Delegation. All built in.
Every workflow runs on the edge. Auth gates verify user identity before sensitive nodes. Human handoffs pause execution, notify reviewers via web/email/Telegram/Discord, and resume on approval. Bots delegate to other bots. LLM nodes classify, generate, and decide. MCP tools connect to any service. This is what workflow automation looks like when it's built for AI.
What changes
14 building blocks. Infinite workflows.
Click any node type to see how it works and when to use it.
Built for real work. Not toy demos.
Bot Message
Trigger
Auth Gate (OTP)
Auth
Classify Intent
LLM
Stripe Lookup
MCP Tool
Amount > $500?
Logic
Manager Approval
Handoff
Process Refund
Action
Customer Support
A customer messages your bot on Discord. The workflow verifies their identity, classifies the issue with an LLM, routes billing to Stripe MCP, technical to a specialized bot, and escalates high-value refunds to a manager for approval.
Nodes used
Try it yourself
This exact workflow can be built in the Aerostack visual editor in under 5 minutes. Every node type is drag-and-drop.
Three nodes nobody else has.
Auth Gate
Verify before acting.
The auth_gate node pauses a workflow and sends an OTP or magic link to verify the user's identity before allowing access to sensitive actions. Supports 4 built-in providers (Resend, SES, Twilio, MSG91) and custom HTTP webhooks.
Why this matters
No other workflow tool can verify identity mid-flow. Zapier, Make, and n8n have no concept of "who is this user?" — they just execute blindly.
How it works
User reaches a sensitive node (refund, data export, account change)
Workflow pauses → sends OTP via email or SMS
User enters the code in the bot conversation
Verified → workflow resumes. Failed → workflow branches to rejection path
Human Handoff
Pause. Notify. Resume.
The human_handoff node pauses workflow execution and notifies a human reviewer via web dashboard, email, Telegram, or Discord. The reviewer approves or rejects (with optional notes), and the workflow resumes down the appropriate branch.
Why this matters
Other tools have "wait for webhook" hacks, but no built-in reviewer notification, approval UI, or branching on approval/rejection. Aerostack has first-class support.
How it works
Workflow reaches a decision that needs human judgment
Execution pauses → reviewer notified on their preferred channel
Reviewer sees context (all variables from previous nodes) and approves/rejects
Approved → workflow resumes on approval branch. Rejected → rejection branch
Delegate to Bot
Specialist agents on call.
The delegate_to_bot node hands off the conversation to another bot in your workspace. Each bot has its own LLM configuration, MCP tools, and workflow. Conversation context is preserved. When the delegated bot finishes, control returns to the original workflow.
Why this matters
This enables agent teams — multiple specialized bots collaborating on a single conversation. No other platform supports bot-to-bot delegation with context preservation.
How it works
Triage bot classifies the user's intent
Workflow delegates to a specialist bot (e.g., "Billing Bot", "Tech Support Bot")
Specialist bot runs its own workflow with its own tools
When done, control returns to the original workflow with the specialist's output
How we compare.
| Feature | Zapier | Make | n8n | Windmill | Aerostack |
|---|---|---|---|---|---|
| Visual node editor | — | ✓ | ✓ | ✓ | ✓ |
| Branching / conditions | — | ✓ | ✓ | ✓ | ✓ |
| Loops (for-each, while) | — | ✓ | ✓ | ✓ | ✓ |
| HTTP / webhook nodes | ✓ | ✓ | ✓ | ✓ | ✓ |
| Schedule / cron triggers | ✓ | ✓ | ✓ | ✓ | ✓ |
| Native LLM nodes | — | — | plugin | — | ✓ |
| MCP tool integrationUnique | — | — | — | — | ✓ |
| Auth gate (identity verification)Unique | — | — | — | — | ✓ |
| Human handoff (approve/reject)Unique | — | — | — | — | ✓ |
| Bot-to-bot delegationUnique | — | — | — | — | ✓ |
| Multi-trigger convergence | — | — | ✓ | ✓ | ✓ |
| Edge-hosted (sub-50ms)Unique | — | — | — | — | ✓ |
| Built-in bot platformsUnique | — | — | — | — | ✓ |
| Free tier | limited | limited | ✓ | ✓ | ✓ |
Build your first workflow.
14 node types. Auth gates. Human handoffs. Bot delegation. MCP integration. Edge-hosted. Free to start.
No credit card required · Free tier included · Deploy in minutes