G2 Leader in Marketing Automation Software
OneSignal unifies push, email, SMS, and in-app messaging into one intelligent platform, allowing you to seamlessly orchestrate messaging across channels for a consistent, high-impact experience
Deliver the right message, at the right time, on the right channel - effortlessly. Design intelligent customer journeys that adapt to user behavior in real-time, ensuring every interaction feels relevant and personalized.
Explore JourneysCreate and manage dynamic audiences in a visual, no-code workflow. Instantly activate segments within real-time journey workflows to drive deeper engagement and better results.
Explore SegmentationAutomate dynamic messaging based on real-time user behavior, preferences, and cross-channel interactions. Deliver hyper-relevant push, email, SMS, and in-app messages that adapt instantly for maximum impact.
Explore PersonalizationUnlock deeper customer understanding with real-time analytics and actionable intelligence. Instantly connect interactions across channels, optimize performance, and drive smarter decisions that boost engagement and conversions.
Explore AnalyticsHear from businesses using OneSignal to boost engagement, increase retention, and drive real results
// Initialize SDK during app bootstrapping
package com.onesignal.sample.android
import android.app.Application
import com.onesignal.OneSignal
class MainApplication : Application() {
override fun onCreate() {
super.onCreate()
OneSignal.initWithContext(this, "APP_ID")
}
}
import SwiftUI
import DotEnv
import OneSignalFramework
@main
struct MyApp: App {
@UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
var body: some Scene {
WindowGroup {
ContentView()
}
}
}
class AppDelegate: UIResponder, UIApplicationDelegate, OSInAppMessageLifecycleListener {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool {
let env = DotEnv(withFile: ".env")
env.load()
OneSignal.initialize(env.get("ONESIGNAL_APP_ID"), withLaunchOptions: launchOptions)
return true
}
}
import 'package:flutter/material.dart';
import 'package:onesignal_flutter/onesignal_flutter.dart';
import 'package:flutter_application_la/live_actiivties_manager.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
LiveActivitiesManager.register();
OneSignal.initialize("<<YOUR_APP_ID>>");
OneSignal.Notifications.requestPermission(true);
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
useMaterial3: true,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
import * as React from 'react';
import { APP_ID } from '@env';
import { OneSignal} from 'react-native-onesignal';
class OS extends React.Component<Props, State> {
constructor(props: Props) {
super(props);
this.state = { };
}
async componentDidMount() {
OneSignal.initialize(APP_ID);
}
}
using System;
using UnityEngine;
using UnityEngine.UI;
using OneSignalSDK;
public class ExampleBehaviour : MonoBehaviour
{
public OSConfigData configData;
public string externalId;
private void Start()
{
OneSignal.Initialize(configData.appId);
}
private void _userStateChanged(object sender, UserStateChangedEventArgs e) {
// OneSignal ID and External ID are available in event state
// e.g., `e.state.Current.OneSignalId`
}
public void LoginUser() {
OneSignal.Login(externalId);
}
public void SetExternalIdString(string newVal) => externalId = newVal;
}
OneSignal makes reaching customers seamless and scalable. Powering billions of messages daily, we help businesses of all sizes connect with their audiences in real time—across push, email, SMS, and in-app messaging—anywhere in the world.
Messages sent daily
Uptime for seamless delivery
Developers trust OneSignal
Of all mobile apps use OneSignal
Seamlessly connect with leading Analytics platforms, CDPs, Data Warehouses, CRMs, and more—so you can harness your data to deliver highly targeted, personalized messaging that drives results
View all integrationsCertified, compliant, and built for trust—because your data deserves the best protection
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