Tool profile
OneSignal: cost, fit and limits
OneSignal is a customer messaging service made by OneSignal that sends web push, mobile push, email, in-app and SMS messages from one dashboard, with an AI assistant and MCP access for building campaigns, segments and journeys.
What to know first
OneSignal sells four tiers: a free plan, Growth from $19 per month, and custom Professional and Enterprise plans. The free plan is unusual because it lists every channel, its AI assistant and MCP access. The privacy page names SOC 2 Type II, ISO 27001 and ISO 27701 certification plus HIPAA compliance. Hosting region, retention and AI training use were not stated on the pages read, so those need a written answer.
OneSignal at a glance
| Maker | OneSignal, Not stated on the vendor pages |
|---|---|
| Free plan | Yes |
| Entry price | $0 per month |
| API access | Yes |
| Category | Best AI Web Push Notification Software in 2026, rank 1 of 12 |
| Website | onesignal.com |
Who OneSignal is best for
Early-stage sites
A site with no budget can run web push, email and app messages from the free plan, then move to Growth when it needs more automation or integrations.
Teams that work through AI assistants
The vendor lists MCP access on Free, so a marketer can ask an outside assistant to build segments or review analytics without a paid tier.
Regulated organizations
Named SOC 2 Type II, ISO 27001, ISO 27701 and HIPAA claims give a security reviewer something to check, though certificates come on request.
OneSignal plans and pricing
| Plan | Price | What it includes |
|---|---|---|
| Free | $0 per month | All channels, basic automation and analytics, OneSignal AI, MCP access and basic personalization, per the pricing page. |
| Growth | Starts at $19 per month | Free plus increased automation, more integrations, prioritized support, better analytics and personalization; annual plans are shown. |
| Professional | Custom | Growth plus advanced marketing and analytics, all integrations, advanced experiments and advanced permission management, with volume discounts. |
| Enterprise | Custom | Professional plus unlimited personalization, reporting history, security and compliance features, a custom SLA and a quote from sales. |
Checked November 2026.
What OneSignal does
- OneSignal AI assistant
- Marketers describe a campaign, segment or journey in plain language and the assistant builds it in the dashboard, or from any outside AI assistant, then reviews analytics the same way.
- Compose with AI
- A drafting feature writes message text for a campaign. The AI page presents it alongside the assistant, and the pricing page lists AI as part of the free plan.
- MCP access
- The pricing page lists MCP access on the Free plan, which lets an outside assistant read and act on account data through the Model Context Protocol.
- Multi-channel sending
- Web push, mobile push, email, in-app and SMS sit on every plan, so a site can add a second channel later without changing vendors or tools.
- Advanced experiments
- Professional adds advanced experiments and permission management, for larger teams that need controlled message tests and role-based access to the account. The pricing page puts this on Professional only.
How OneSignal handles your data
The privacy page states SOC 2 Type II certification, ISO 27001 and ISO 27701 certification (certificate available on request) and HIPAA compliance. The pages read did not say where data is hosted, how long it is retained, or whether customer data trains the AI assistant. Because the AI features can act on account data through MCP, a buyer should ask in writing which data the assistant reads and whether any of it is stored by a model provider.
Where OneSignal falls short in practice
- Advanced features sit behind a quote. Advanced experiments, all integrations and advanced permission management start at the Professional tier, which has no printed price, so a growing team cannot budget for them from the page.
- Free plan automation is basic. The free plan lists basic automation and analytics only. A site that needs multi-step journeys or more integrations must move to Growth, and the pages read did not quote the higher limits.
Works with
Alternatives to OneSignal
OneSignal: common questions
Does the OneSignal free plan include web push and the AI assistant?
Yes. The pricing page lists all channels, basic automation, OneSignal AI and MCP access at $0 per month, and web push is among the channels. The pages read did not quote a subscriber cap for the free plan, so check current limits in the dashboard before relying on it for a large audience.
What does OneSignal Growth add over the free plan?
Growth starts at $19 per month and adds increased automation, more integrations, prioritized support, better analytics and better personalization, with annual plans shown. The page did not quote the exact automation or integration limits, so ask which of them you need before upgrading. Professional and Enterprise are custom quotes.
Which security certifications does OneSignal name?
The privacy page names SOC 2 Type II, ISO 27001 and ISO 27701 certification and HIPAA compliance, with the ISO certificate available on request. It does not state a hosting region. A security review should request the reports directly rather than rely on the page, which only lists the claims.
Can an outside AI assistant control OneSignal?
The pricing page lists MCP access on the free plan, and the AI page says users can work with OneSignal AI from any AI assistant. That means campaigns, segments and analytics can be handled by an assistant. Decide in advance which permissions you grant, since the pages read did not detail them.
Who pays for custom Professional and Enterprise plans?
Larger teams that need advanced experiments, all integrations, permission management, unlimited personalization, reporting history and a custom SLA. Both tiers are quoted after contact with sales, with volume discounts mentioned for Professional. Smaller sites usually stay on Free or Growth, where the entry price is printed.