AI-First Notification Infrastructure

The delivery layer
for AI agents

Herald connects AI agents to humans — on any device, in any language. Smart routing, multi-channel delivery, real-time presence. One API call.

Open Dashboard →See how it works
POST /v1/notify
X-Herald-Key: hrl_live_...

{
  "user_id": "user-123",
  "intent":   "approval_required",
  "urgency":  "high",
  "context": {
    "amount": "$45,000",
    "vendor":  "ACME Corp"
  }
}

// Herald decides: iPhone push at 14:23 ✓ delivered
Features

Built for the agentic era

🧠

AI Routing

Scores every channel in <5ms using real-time presence, usage history, and urgency. No LLM in the critical path — pure speed.

✍️

Intent Mode

Send an intent + context, Herald generates the perfect message for each channel and language using Claude Haiku.

📡

Presence Engine

Tracks where the user is in real-time — iPhone active, in CarPlay, Watch on wrist, calendar busy. Routes to the right surface.

🔁

Smart Fallback

If push doesn't open in N minutes, automatically falls back to the next best channel. You define the chain, Herald executes.

🌐

Multi-Channel

APNs, FCM, Email, WhatsApp, SMS, Alexa, Google Home, Web Push, Webhook — one API, every surface.

🔒

Agentic-Native

Designed for AI agents. Approval Gate patterns, structured payloads, acknowledgment tracking. Not bolted on — built in.

Channels

Every surface. One API.

iOS (APNs)
Android (FCM)
Email
WhatsApp
SMS
Alexa
Google Home
Web Push
Webhook
Pricing

Start free, scale as you grow

Free
$0/mo
10K notifications/mo
  • ✓ APNs + FCM + Email
  • ✓ Direct mode
  • ✓ 7-day log retention
POPULAR
Growth
$49/mo
500K notifications/mo
  • ✓ + SMS + WhatsApp
  • ✓ AI routing
  • ✓ 30-day retention
Business
$199/mo
5M notifications/mo
  • ✓ All channels
  • ✓ AI content generation
  • ✓ 90-day retention
Enterprise
Custom
Unlimited
  • ✓ Dedicated infra
  • ✓ SLA 99.99%
  • ✓ Custom retention

Ready to ship?

Get your API key and send your first notification in 5 minutes.

Open Dashboard →