Prompt
What should I use for sending transactional notifications from my app?
Latest observation
Oct 14, 2026
OpenAI APIWeb search: off
For transactional notifications from your app, use a service built specifically for reliable, event-driven delivery rather than a marketing email platform.
Good options
- Email: SendGrid, Mailgun, Postmark, Amazon SES
- SMS/Phone: Twilio, Vonage
- Push notifications: Firebase Cloud Messaging (FCM), Apple Push Notification service (APNs)
- In-app notifications: Your own backend + websocket/polling system
Best choices by use case
- Best overall for transactional email: Postmark
Known for strong deliverability and a focus on transactional messages. - Most flexible / common: SendGrid or Mailgun
- Lowest cost at scale: Amazon SES
- Best for SMS + phone + multi-channel: Twilio
What to look for
- High deliverability
- Simple API
- Webhooks for bounces/opens/deliveries
- Dedicated transactional support
- Easy templates and localization
- Compliance features and unsubscribe handling where relevant
Recommendation
If you’re sending email notifications like password resets, receipts, verification codes, and alerts, start with Postmark or SendGrid.
If you need SMS or voice, add Twilio.
If cost is the biggest concern and you’re comfortable handling more setup, use Amazon SES.
If you tell me your app stack and whether you mean email, SMS, or push, I can recommend the best exact setup.