OneSignal

freemium

OneSignal is the world's leading customer engagement platform. Send mobile push, web push, email, SMS/RCS, and in-app messages to onboard, engage, and retain users at scale.

Marketing & Sales

Automation & Agents

Email Marketing Tools

About

OneSignal is the world's most widely adopted customer messaging and engagement platform, used by 1 in 4 app publishers globally. It enables product and marketing teams to deliver personalized, timely communications across mobile push notifications, web push, email, SMS/RCS, in-app messages, and Live Activities — all from one unified platform. At its core, OneSignal offers Journeys, a visual workflow builder that orchestrates multi-channel messaging sequences based on user behavior and lifecycle events. Teams can segment audiences with precision, personalize content dynamically, and measure performance through built-in analytics and event tracking. The platform supports SDKs for Android, iOS, Flutter, React Native, Expo, and Unity, plus REST APIs and event streams for advanced integrations. An AI-assisted setup experience allows teams to go from prompt to running campaign in minutes, with no deep technical expertise required. OneSignal is particularly well-suited for mobile apps, e-commerce, gaming, news/media, and fintech companies looking to reduce churn, boost retention, and drive measurable revenue growth. Customers like Zenni Optical, TAG Heuer, and Betmate report dramatic improvements in click-through rates, retention, and monthly active users after adopting the platform. A generous free tier makes it accessible for startups, while enterprise-grade scalability supports the world's largest apps.

Key Features

Omnichannel Messaging: Deliver messages across mobile push, web push, email, SMS/RCS, in-app, and Live Activities from a single unified platform.
Journeys Workflow Builder: Design automated, multi-step messaging campaigns visually using a drag-and-drop journey builder triggered by user behavior and lifecycle events.
Advanced Segmentation & Personalization: Target the right users with granular audience segmentation and dynamic message personalization based on user attributes and real-time events.
Analytics & Event Tracking: Measure engagement, retention impact, and conversion rates with built-in analytics dashboards and custom event tracking.
Multi-Platform SDKs & APIs: Integrate seamlessly via SDKs for iOS, Android, Flutter, React Native, Expo, and Unity, plus REST APIs and event streams for custom workflows.

Use Cases

A mobile gaming company re-engages lapsed players with personalized push notifications and in-app offers triggered by inactivity events.
An e-commerce brand sends abandoned cart SMS reminders and post-purchase email sequences to increase conversion and repeat purchases.
A fintech app uses Journeys to onboard new users with a sequence of push notifications and in-app messages guiding them through account setup.
A news and media publisher delivers breaking news web push alerts to opted-in subscribers directly in their browser.
A SaaS startup uses OneSignal's free tier to send onboarding in-app messages to new trial users, improving activation rates without engineering overhead.

Pros

Easy to Get Started: An AI-assisted onboarding flow and intuitive UI allow teams with limited technical experience to launch campaigns in minutes.
Generous Free Tier: OneSignal's free plan is robust enough for startups and indie developers to send push and in-app notifications at no cost.
Broad Channel Coverage: Supporting six messaging channels in one platform eliminates the need for multiple point solutions and reduces integration overhead.
Proven at Scale: Trusted by over 2 million businesses and capable of sending 12 billion+ messages daily, with proven enterprise reliability.

Cons

Costs Rise Quickly at Scale: Pricing tiers can become expensive as subscriber lists and message volumes grow, particularly for SMS and email channels.
Advanced Features Require Higher Plans: Features like advanced analytics, A/B testing, and dedicated IP for email are locked behind paid or enterprise tiers.
Limited CRM Capabilities Natively: OneSignal focuses on messaging rather than full CRM functionality, so deep customer data management may still require a separate tool.

Frequently Asked Questions

Yes, OneSignal offers a free plan that includes push notifications and basic in-app messaging for apps with up to a certain subscriber threshold. Paid plans unlock higher volume, additional channels like email and SMS, and advanced features.

OneSignal supports iOS, Android, Flutter, React Native, Expo, and Unity mobile apps, as well as web browsers for web push. It also provides REST APIs for custom server-side integrations.

Yes, the Journeys feature lets you build visual, automated messaging workflows that trigger messages across multiple channels based on user behavior, events, or lifecycle stage.

Yes, OneSignal supports SMS, RCS (Rich Communication Services), and email alongside push and in-app messaging, enabling true omnichannel customer engagement from one platform.

OneSignal allows you to create audience segments based on user attributes, behavioral events, location, device type, and custom data tags. These segments can be used to precisely target messaging campaigns.