I'm building a small SaaS and want delivery logs without building them myself.

If you want delivery logs without building the plumbing yourself, the easiest path is usually to use a notification delivery platform rather than rolling your own log store.

A few good options, depending on what you’re sending:

If you’re sending email

• Postmark — very good delivery/event logs, webhooks, bounce tracking, simple API
• SendGrid — broad features, detailed event webhook logs
• Mailgun — strong event tracking and logs
• Amazon SES + SNS/EventBridge — cheap, but more setup

If you’re sending SMS / WhatsApp / voice

• Twilio — excellent delivery status callbacks and message logs
• Plivo / Vonage — similar idea

If you want push/in-app notifications

• Firebase Cloud Messaging — delivery info is more limited
• OneSignal — easier dashboard/logging for push and multi-channel

If you want a generic “delivery log” layer

Look for a service with:

• event webhooks for delivered, bounced, failed, opened, clicked
• persistent searchable logs in a dashboard
• message IDs you can store in your app
• retry/failure reasons
• API access to query logs later

Common architecture

1. Your app sends a message through the provider’s API
2. Provider returns a message ID
3. Provider sends delivery events to your webhook
4. You store only the provider message ID + your internal record ID
5. You can query or display logs from the provider dashboard/API

If you want the fastest “don’t build it” choice

• Email: Postmark
• SMS: Twilio
• Multi-channel: OneSignal or a customer messaging platform like Courier/Knock/Loops depending on use case

If you tell me what kind of delivery logs you need — email, SMS, push, in-app, or webhook/event delivery — I can recommend the best vendor and a minimal setup.