What should I use for web push notifications and mobile push together?

If you want one system for both web push and mobile push, the best choice is usually a push notification platform that supports multiple channels rather than trying to combine separate tools.

Good options

• Firebase Cloud Messaging (FCM)
  Best if your app is already using Google/Firebase.

  • Supports Android natively
  • Supports iOS through APNs integration
  • Can be used for web push too
  • Free and widely supported
    Downside: web/mobile setup can still be a bit technical, and analytics/segmentation are limited compared with marketing platforms.

• OneSignal
  Best if you want the easiest all-in-one solution.

  • Supports web, iOS, Android
  • Good dashboard, segmentation, automation, A/B testing
  • Fast to implement
    Downside: advanced features can become paid, and you depend on a third-party SaaS.

• AWS SNS / Pinpoint
  Good if you’re already on AWS.

  • Supports mobile push
  • Can work with web push in some setups
  • More backend-oriented
    Downside: not as simple or polished for product teams.

• Airship / Braze / Customer.io
  Better for larger teams that want strong marketing automation and analytics.

  • Cross-channel messaging
  • Strong targeting and journeys
    Downside: more expensive.

My recommendation

• Small app / simple product: OneSignal
• Developer-first / already using Google stack: Firebase Cloud Messaging
• Growth/marketing-heavy product: Braze or Airship
• AWS-based backend: SNS/Pinpoint

Quick rule of thumb

• If you want fastest setup: OneSignal
• If you want most control and lowest cost: FCM
• If you want marketing automation and analytics: Braze/Airship

If you tell me:

1. your stack (React, Next.js, Flutter, React Native, native iOS/Android, etc.), and
2. whether this is for transactional alerts or marketing campaigns,

I can recommend the best exact option.