Best for
Best for teams and developers that want one platform for both marketing campaigns and transactional email, priced by send volume.
- Freelancers
- Small and mid-sized
- Enterprise
Email Marketing Comparison
Mailjet vs. OneSignal
At a glance
At a glance
Best for
Best for product and growth teams running app-first lifecycle messaging, where push and in-app carry as much of the programme as email.
- Freelancers
- Small and mid-sized
- Enterprise
Cataleo does not name a winner. Both statements come from the vendors themselves.
Full Comparison
| Criterion | Mailjet | OneSignal |
|---|---|---|
| Starting price | lower value From $9 / month Starter plan; priced by monthly email volume. A free plan is available. | Free plan, then from $19 / month The Growth platform fee, billed monthly. Messaging is metered on top: $0.012 per monthly active user for mobile push, $0.004 per web push subscriber and $1.50 per 1,000 email sends after the first 20,000 a month. Professional and Enterprise are annual contracts with quoted pricing and volume discounts. |
| Free trial | Free plan with 6,000 emails per month (200 per day) | Free plan across all channels, with 10,000 email sends a month and unlimited mobile push and in-app messaging for up to 1,000 monthly active users |
| Users | Not stated | The vendor states 200,000 apps, 1.5 billion monthly active users and 1.3 trillion messages sent a year |
| API | Yes, a Send API and SMTP relay on all paid plans | Yes, unlimited API send access on every plan, SDKs for Android, iOS, Flutter, React Native, Expo and Unity, and a hosted MCP server in open beta |
| Hosting | Cloud (SaaS) | Cloud (SaaS) |
| Made in | Not stated | United States |
| Campaign types | Yes, marketing campaigns and newsletters plus transactional email, with landing pages on Premium | Email, mobile push, web push, in-app messaging, SMS and RCS, plus iOS Live Activities, all from the same dashboard |
| Automation and journeys | Yes, automations on the Premium plan | Journeys, a visual drag-and-drop workflow builder with branching, cross-channel flows, webhook steps and unlimited message steps. Active journeys are capped by plan at 3 on Free, 5 on Growth and 20 on Professional, and are unlimited on Enterprise |
| Segmentation and personalisation | Yes, segmentation from the Essential plan, with dynamic content on Premium | Audience segments, data tags and custom events, with timezone delivery, dynamic content and personalised notifications on every plan and intelligent delivery, time-delayed sends and retargeting from Growth up. Segments and tags are capped by plan, from 6 of each on Free to unlimited on Enterprise |
| Templates and editor | Yes, an advanced drag-and-drop editor on every plan | No-code and HTML message builders, free prebuilt templates, a drag-and-drop email editor with full HTML control, and Liquid syntax for dynamic content |
| Deliverability and testing | Yes, A/B testing on Premium, with a dedicated IP available on higher-volume plans | Email auto warm-up on every plan, plus A/B testing that is standard on Free and Growth and multivariate on the annual plans. Sending uses shared IPs on Free and Growth, with a dedicated IP available on Professional and Enterprise depending on volume |
| Ecommerce and CRM data | Through connectors rather than a built-in store sync: Mailjet ships its own plugins for WordPress with WooCommerce and for PrestaShop, while the other ecommerce and CRM entries in its integrations directory, among them Shopify, HubSpot and Salesforce, are connected through Zapier or another iPaaS partner | More than 30 core integrations across analytics, CRM, customer data platforms and data warehouses, including Segment, HubSpot, Amplitude, Mixpanel, Adobe Experience Cloud, Snowflake, Google BigQuery, Databricks and RevenueCat, with premium integrations available for purchase on the annual plans |
| Integrations and API | Yes, a Send API and SMTP relay on all paid plans | Yes, unlimited API send access on every plan, SDKs for Android, iOS, Flutter, React Native, Expo and Unity, and a hosted MCP server in open beta that exposes messaging, users, segments, templates, exports and analytics to an outside AI assistant |
| AI features | Yes | Yes |
| MCP-ready | Yes | Yes |
| Deployment | Cloud (SaaS), Browser-based | Cloud (SaaS), Browser-based |
| Support | Email helpdesk, Phone, Chat | Not stated |
| Onboarding | more entries Documentation and knowledge base, Video tutorials, Guided onboarding | Documentation and knowledge base, Guided onboarding |
| Company size | Freelancers, Small and mid-sized, Enterprise | Freelancers, Small and mid-sized, Enterprise |
| Integrations | more entries WordPress, WooCommerce, PrestaShop, Drupal, Joomla, Squarespace, Webflow, Shopify, BigCommerce, Stripe, PayPal, Salesforce, HubSpot, Pipedrive, Zoho, Microsoft Dynamics CRM, Segment, Zapier, Make, n8n, Slack, Zendesk, Intercom, Google Sheets, Airtable, Typeform, Sinch Engage | Segment, HubSpot, Amplitude, Mixpanel, Adobe Experience Cloud, Snowflake, Google BigQuery, Databricks, RevenueCat, ActiveCampaign, Adjust, Adapty |
Add a tool
Adds a column to the table, from the tools in this category.
Row where the values differ The small markers point at the lower number, the longer list or the stated feature. They describe the data, they are not a verdict.
The short version
Key Differences
- Starting price Mailjet From $9 / month OneSignal Free plan, then from $19 / month
- Free trial Mailjet Free plan with 6,000 emails per month (200 per day) OneSignal Free plan across all channels, with 10,000 email sends a month and unlimited mobile push and in-app messaging for up to 1,000 monthly active users
- API Mailjet Yes, a Send API and SMTP relay on all paid plans OneSignal Yes, unlimited API send access on every plan, SDKs for Android, iOS, Flutter, React Native, Expo and Unity, and a hosted MCP server in open beta
- Campaign types Mailjet Yes, marketing campaigns and newsletters plus transactional email, with landing pages on Premium OneSignal Email, mobile push, web push, in-app messaging, SMS and RCS, plus iOS Live Activities, all from the same dashboard
- Automation and journeys Mailjet Yes, automations on the Premium plan OneSignal Journeys, a visual drag-and-drop workflow builder with branching, cross-channel flows, webhook steps and unlimited message steps. Active journeys are capped by plan at 3 on Free, 5 on Growth and 20 on Professional, and are unlimited on Enterprise
Every line is one datapoint from the table above, picked automatically. Nothing here is written text.
The trade-offs
Strengths and Limitations
Mailjet
Strengths
- Priced by email volume, with unlimited contacts on the Essential and Premium plans
- Advanced drag-and-drop editor on every plan, including the free tier
- Send API and SMTP relay for transactional email on all paid plans
- Free plan with 6,000 emails per month
Limitations
- Automations, A/B testing and dynamic content are reserved for the Premium plan
- The Free and Starter plans cap contacts at 1,000 and 2,000
OneSignal
Strengths
- The free plan carries every channel, including unlimited mobile push for up to 1,000 monthly active users
- Unlimited contacts and unlimited API send access on every plan, the free one included
- Push, in-app, email, SMS and RCS run on one platform, so a lifecycle programme does not span two vendors
- Official SDKs for Android, iOS, Flutter, React Native, Expo and Unity
- A hosted MCP server lets an outside AI assistant query analytics and operate campaigns
Limitations
- Active journeys, audience segments and data tags are all capped below the Enterprise plan
- Frequency capping, conversion metrics and CSV exports start on the annual Professional plan
- Cost follows monthly active users and send volume, so a large but lightly engaged audience gets expensive
- Dedicated sending IPs are limited to the annual plans and depend on volume
- Professional and Enterprise pricing is quoted rather than published
Plans
Pricing
Mailjet
- Free $0 / month 6,000 emails per month (200 per day), up to 1,000 contacts, with the advanced drag-and-drop editor.
- Starter From $9 / month 8,000 emails per month, up to 2,000 contacts, with online support.
- Essential From $17 / month 15,000 emails per month, unlimited contacts, segmentation and no daily send limit.
- Premium From $27 / month Adds automations, A/B testing, dynamic content, landing pages and up to 20 subaccounts, plus priority support, with phone and chat support from 50,000 emails a month.
- Custom Not stated Custom enterprise plans for high-volume senders, with a dedicated technical account manager, unlimited subaccounts, phone and chat support and guided onboarding, training and consulting.
OneSignal
- Free $0 Per month. All channels, basic automation, analytics and personalisation, OneSignal AI and the MCP server, 10,000 email sends a month, unlimited mobile push and in-app messaging for up to 1,000 monthly active users, 3 active journeys and 6 audience segments.
- Growth $19 Per month, starting price. Adds more automation, more integrations, prioritised support and better analytics and personalisation. Messaging is metered on top: $0.012 per monthly active user for mobile push, $0.004 per web push subscriber and $1.50 per 1,000 email sends after the first 20,000.
- Professional Not stated Annual contract, quoted, with volume discounts. Adds advanced marketing and analytics, all integrations, advanced experiments, advanced permission management, 20 active journeys and reporting history up to a year.
- Enterprise Not stated Annual contract, quoted. Adds unlimited personalisation, reporting history up to two years, a security and compliance package, a custom SLA and a dedicated success manager.
What users say
Review Scores · opens after launch
Mailjet
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Nothing has been published here yet, and no score is shown. How a review is checked before it appears is described below.
OneSignal
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Nothing has been published here yet, and no score is shown. How a review is checked before it appears is described below.
How we check reviews
Before sending, the author has to confirm three things: that they have used the product themselves, that they work neither for the vendor nor for a competitor, and that nobody is paying them for the review. We also ask whether the vendor invited them to write it. That answer is required, either answer is accepted, and it stays with the review.
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Where this comes from
Where this comes from
Mailjet https://www.mailjet.com · checked against the official source on 2026-08-21
OneSignal https://onesignal.com · checked against the official source on 2026-09-23
This table lists factual criteria taken from information the vendors publish themselves. For how we put it together, see the methodology.