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Appsmith vs OneSignal: 2026 Comparison

Appsmith OneSignal
Overview An open-source low-code platform for building internal tools with a visual builder and extensive data source connectors. A customer messaging platform for push notifications, in-app messaging, SMS, and email with audience segmentation.
Pricing Freemium (Free-$40/user/month) Freemium (Free-$99/month)
Key Features
  • Open source
  • Visual builder
  • Data source connectors
  • JavaScript widgets
  • Git sync
  • RBAC
  • Audit logs
  • Custom widgets
  • Push notifications
  • In-app messaging
  • Email
  • SMS
  • Segmentation
  • A/B testing
  • Analytics
  • Journeys
Pros
  • Open source
  • Self-hosted option
  • Good community
  • Many connectors
  • Generous free plan
  • Multi-channel
  • Easy integration
  • Good documentation
Cons
  • UI can be janky
  • Learning curve
  • Community support varies
  • Fewer pre-built components
  • Free plan has limitations
  • Can be complex
  • Some features in beta
  • Support varies