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Push Notifications Software

OneSignal

Customer engagement platform sending push, email, SMS and in-app messages for app publishers

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About OneSignal

OneSignal is a messaging platform that app publishers use to reach their users with push notifications, web push, email, SMS and in-app messages. It also provides AI tools that draft, send, test and tune campaigns within brand rules the customer sets.

What OneSignal offers

  • Push and web push — notifications to phones and browsers.
  • Email, SMS and in-app messages — other channels managed in the same place.
  • AI-driven lifecycle campaigns — automation that writes and optimises messages for onboarding, engagement and retention.
  • Journeys — multi-step flows that deliver a message at each stage of a user's life with an app.
  • Developer kits — SDKs for Android, iOS, Flutter, React Native, Expo and Unity.

Who it works with

App publishers in areas such as mobile gaming, fintech and health and wellness. Examples on its site are Beach Bum Games, which brings players back with it, and Bitcoin.com, which uses it to introduce new features.

Key facts

  • Scale claimed: over two million businesses and more than twelve billion messages annually
  • Review rating: 4.7 out of 5 on G2

Profile written by TrustList from the business's own published information, Oct 2026.

Categories & features

Rankings

As of 2026-10-05. Organic ranks only; sponsored placements are never ranks.

What the business tells TrustList

Stability: major incidents
3 incidents measured

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