Overview

OneSignal is a customer-messaging platform that brings push, email, in-app messages, and other channels together with audience tools and automated journeys. It is best suited to teams coordinating campaigns across channels, from organizations starting on a free tier to businesses that need custom volume pricing.

Its channel range and automation make it more capable than a push-only service, but usage fees and channel limits deserve close attention as audiences grow.

Key features

Channels and campaign tools

OneSignal supports mobile and web push, email, in-app messaging, RCS, SMS, and Live Activities. Behavioral triggers, audience segmentation, automation workflows, a visual journey builder, and A/B testing let teams shape campaigns around user activity rather than rely only on one-off sends. That combination suits coordinated lifecycle messaging; it may be more platform than a team needs for a single channel.

SDKs cover Android, iOS, Flutter, React Native, Expo, and Unity. Integrations connect with analytics systems, customer data platforms, warehouses, and CRMs. The API provides unlimited message-delivery send access across plans, and data export and mobile analytics are supported.

Limits and administration

Web push is capped at 10,000 subscribers per send. The plan comparison sets mobile push support at up to 1,000 monthly active users. Free retains subscription records active in the past 18 months. These limits make Free useful for getting started, but teams should check that their audiences and reporting needs fit before building campaigns around it.

Permissions range from Admin and Viewer to all roles on higher plans. Security provisions listed for the platform include GDPR compliance, two-factor authentication, audit logs, and security and legal packages. Selected plans add prioritized support, jump-start onboarding, and dedicated success management.

Pricing

OneSignal uses a freemium model. Paid plans combine a fixed platform fee with variable usage fees, so the advertised starting price is not the full cost for every channel or volume.

Plan	Price and terms	What it includes
Free	$0.00 USD per month	10,000 email sends monthly, 1,000 monthly active mobile users, 3 active Journeys, 10,000 web push subscribers per send, 6 audience segments, and 6 data tags. It also includes all channels, basic automation and analytics, AI and MCP, and basic personalization. Email beyond the 20,000-sends general allowance is $1.50 per 1,000 sends.
Growth	$19.00 USD per month; month-to-month, with usage fees by channel	5 active Journeys, 20,000 free email sends monthly, 10 audience segments, 10 data tags, 30+ core integrations, and 90 days of reporting history. It is aimed at small teams optimizing growth.
Professional	Custom volume-based pricing; annual contract	20 active Journeys, 20 segments, 100 data tags, 30+ core integrations, one year of reporting history, and 60 days of message-event retention. Volume discounts are available.
Enterprise	Custom pricing; annual contract	Unlimited active Journeys, segments, and data tags, 30+ core integrations, two years of reporting history, and 90 days of message-event retention.

Free’s plan comparison gives a 10,000 monthly email allowance, while the general Free-plan description says 20,000. Confirm the applicable allowance before budgeting. Growth offers a clear monthly entry point and can be changed or downgraded to Free at any time without penalty; Professional and Enterprise commit buyers to annual contracts. Payments are accepted in USD, with some annual customers able to pay locally through reseller partners.

Platforms

OneSignal supports web, Windows, macOS, iOS, and Android. Its SDKs also support Flutter, React Native, Expo, and Unity, making it relevant to teams shipping across web and mobile environments.

Who it's for

OneSignal fits teams that need to coordinate push, email, in-app messaging, and other channels, and want segmentation and journey automation in the same platform. Free gives individuals and organizations a way to start, while Growth targets small teams and the annual custom-priced tiers suit growing businesses and organizations operating at scale.

It is less compelling for a team that needs only a narrow push function, or for buyers who need predictable all-in pricing without calculating channel usage charges. Organizations with audiences above the stated mobile-push threshold or web-push send cap should weigh those constraints before choosing a plan.

Pros and cons

Pros: Broad channel coverage, including push, email, in-app, RCS, SMS, and Live Activities, supports coordinated campaigns in one platform.
Pros: Journeys, behavioral triggers, segmentation, and A/B testing give teams more control over how campaigns respond to user activity.
Pros: Growth is month-to-month and can be downgraded to Free at any time without penalty.
Cons: Variable usage fees sit on top of paid-plan platform fees, making total spend dependent on channel and volume.
Cons: Free has tight audience and workflow limits, and its email allowance is stated differently across the plan comparison and general plan description.
Cons: Professional and Enterprise require annual contracts, while web push and mobile push have stated audience limits.

Alternatives

Pushwoosh is worth comparing for teams seeking a freemium option with a listed free tier including 1,000 MAU, 20,000 monthly email sends, and unlimited push notifications.
Reteno may suit teams that prioritize a free Startup plan with unlimited mobile pushes, unlimited segments, and specified workflow-launch and channel-send allowances.
EngageLab is a paid alternative with a free trial and an omnichannel marketing-automation plan featuring a visual campaign builder and 360-degree customer view.
Plumb5 Mobile Marketing is another paid option with a free trial.
CleverTap is a paid alternative with a free trial and a Core plan priced at $85.00 USD per month; taxes and add-ons are excluded, and billing starts after a 30-day trial.
Notifly is a paid alternative with a free trial and a Standard plan priced at 150000.00 KRW per month.
Journiq is a paid alternative with a free trial and a Starter plan priced at $49.00 USD per month.
Userpilot is a paid alternative with a free trial and a Starter plan priced at $299.00 USD per month.

Browse more options in Mobile Marketing Automation Software, Customer Journey Orchestration Software, and Push Notification Software.

Verdict

OneSignal is a strong choice for teams that want broad messaging channels, automation, and audience tools under one roof, with a free starting point and flexible month-to-month Growth. Choose it when that breadth matters; look elsewhere if you need straightforward fixed pricing or your audience exceeds its stated channel limits.

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