Why: effective 2026-09-01 — OneSignal limited mobile push and in-app messaging on its Free plan to organizations with up to 1,000 monthly active users, from September 1, 2026 for new customers and October 1, 2026 for existing customers. Above the limit, mobile push and in-app messages pause until the account upgrades; web push and email keep working under the existing limits. Mobile push had been unlimited on Free.
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