I'm building a SaaS app and need email, SMS, and push notifications

Got it — for a SaaS app, you’ll usually want a single notification system that can send:

• Email
• SMS
• Push notifications

A good setup is to use a provider abstraction layer so your app doesn’t depend directly on one vendor everywhere.

Common provider options

Email

• SendGrid — popular, easy API, good deliverability tools
• Amazon SES — cheaper at scale, more setup
• Postmark — excellent transactional email deliverability

SMS

• Twilio — most common and flexible
• Vonage — solid alternative
• MessageBird — global coverage

Push notifications

• Firebase Cloud Messaging (FCM) — standard for Android/web push, often used for mobile
• Apple Push Notification service (APNs) — for iOS
• Many apps use Firebase as the push layer and connect APNs through it

Recommended architecture

Use:

1. Your app
2. Notification service / worker
3. Provider adapters for email, SMS, push
4. Queue for retries and async sending

This gives you:

• retries
• logging
• template management
• provider failover
• analytics

Suggested SaaS-friendly stack

If you want simple and reliable:

• Email: Postmark or SendGrid
• SMS: Twilio
• Push: Firebase Cloud Messaging

Important features to include

• User notification preferences
• Opt-in/opt-out handling
• Template system
• Event-based triggers
• Delivery status tracking
• Retry logic and dead-letter queue
• Unsubscribe management for email
• Compliance for SMS (TCPA, carrier rules)

Example notification flow

When an event happens:

• user_signed_up
• create notification job
• look up user preferences
• choose channel(s)
• send through provider
• store delivery status

If you want to build this cleanly

You can define an interface like:

interface NotificationProvider {
  sendEmail(to: string, subject: string, body: string): Promise<void>;
  sendSMS(to: string, message: string): Promise<void>;
  sendPush(userId: string, title: string, body: string): Promise<void>;
}

Then implement each provider separately.

Quick recommendation

If you’re starting from scratch:

• SendGrid/Postmark for email
• Twilio for SMS
• Firebase Cloud Messaging for push

If you want, I can also help you with:

1. a provider comparison table
2. a database schema for notifications
3. a Node.js/TypeScript implementation
4. a multi-channel notification architecture diagram