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. On the Free plan, emails go through NotifyKit's shared SendGrid infrastructure. On paid plans, you connect your own SendGrid API key (BYOK — bring your own key), giving you full control over deliverability, sender reputation, and sending limits.

Coming soon: Support for Resend, Mailgun, and AWS SES.

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 key)
Startup	$30/month	15,000 webhooks	Unlimited (via your SendGrid 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