Introduction

NotifyKit is a simple, affordable notification infrastructure for indie developers, small teams, and startups.

What is NotifyKit?

Most applications eventually need to send emails and trigger webhooks — for order confirmations, password resets, event notifications, and more. The operational overhead adds up fast: retries, delivery logs, deduplication, queue management, domain setup.

NotifyKit handles all of that behind a clean API. You make one call; NotifyKit queues it, delivers it, retries on failure, and logs the result.

It's a focused alternative for teams that don't need the full complexity of an enterprise notification platform.

What NotifyKit Handles

• Background processing and automatic retries
• Idempotent delivery — no accidental double-sends
• Delivery logs with job status tracking
• Domain verification for custom sender addresses
• Per-plan rate limiting and monthly quotas

What NotifyKit Sends

Emails — Send transactional emails via SendGrid or Resend. On the Free plan, emails go through NotifyKit's shared infrastructure (SendGrid with Resend as automatic fallback). On paid plans, you connect your own API key from either provider (BYOK — bring your own key), giving you full control over deliverability, sender reputation, and sending limits. You can configure both providers simultaneously — NotifyKit delivers through them in priority order and falls back automatically on failure.

Webhooks — Deliver HTTP callbacks to any endpoint, with configurable HTTP method, custom headers, and automatic exponential backoff retries on failure.

Plans

Plan	Price	Monthly Limit	Emails
Free	$0	100 notifications	Shared with webhook quota
Indie	$9/month	4,000 webhooks	Unlimited (via your SendGrid or Resend key)
Startup	$30/month	15,000 webhooks	Unlimited (via your SendGrid or Resend key)

On the Free plan, every notification (email or webhook) counts toward a single 100/month limit. On paid plans, emails are unlimited and only webhooks count toward the monthly quota.

Quick Example

import { NotifyKitClient } from "@notifykit/sdk";

const client = new NotifyKitClient({
  apiKey: process.env.NOTIFYKIT_API_KEY!,
});

// Send an email
const emailJob = await client.sendEmail({
  to: "user@example.com",
  subject: "Welcome!",
  body: "<h1>Hello World</h1>",
  idempotencyKey: "welcome-user-123",
});

console.log("Email queued:", emailJob.jobId);

// Send a webhook
const webhookJob = await client.sendWebhook({
  url: "https://your-app.com/webhooks/events",
  payload: {
    event: "user.signup",
    userId: "123",
  },
});

console.log("Webhook queued:", webhookJob.jobId);

Next Steps

• Installation — Install the SDK
• Quick Start — Send your first notification
• API Reference — Explore the full API