MailerSend vs OneSignal Comparison
Compare MailerSend vs OneSignal features, pricing, and more.
Last updated: November 2026
MailerSend
6.9/10
MailerSend is a transactional email and SMS API with SMTP relay and a template builder, aimed at developers and businesses sending app-triggered messages.
OneSignal
7.1/10
OneSignal is a customer messaging platform for sending mobile push, web push, in-app messages, email and SMS to app and website users.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 6.9/10 | 7.1/10 |
| Analytics | 6/10 | 6/10 |
| Cost | 7/10 | 7/10 |
| Customization | 6/10 | 6/10 |
| Ease of Use | 8/10 | 8/10 |
| Integration | 7/10 | 8/10 |
| Scalability | 7/10 | 8/10 |
| Security | 6/10 | 7/10 |
| Support | 8/10 | 6/10 |
| Pricing | ||
| Free plan | Yes | Yes |
| Cheapest paid plan | $7/mo Hobby | $19/mo Growth |
| Estimated cost for 10 users | $110/mo Professional | Free Free |
| Features | ||
| Email Marketing | ||
| A/B Testing | Not listed | |
| Segmentation | Not listed | |
| SMS Marketing | Not listed | |
MailerSend vs OneSignal cost by team size
MailerSend and OneSignal cost the same at 1 user; OneSignal costs less from 5 users.
| Team size | MailerSend | OneSignal |
|---|---|---|
| 1 user | FreeFree | FreeFree |
| 5 users | $7/moHobby | FreeFree |
| 10 users | $110/moProfessional | FreeFree |
| 25 users | $110/moProfessional | FreeFree |
| 50 users | $110/moProfessional | FreeFree |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose MailerSend
- Higher Support score (8/10 vs 6/10)
- Better fit for developers (9/10 vs 7/10)
- Better fit for saas companies (9/10 vs 7/10)
Why choose OneSignal
- Lower estimated cost for 10 users: Free vs $110/mo
- Higher Integration score (8/10 vs 7/10)
- Higher Scalability score (8/10 vs 7/10)
- Better fit for marketing teams (7/10 vs 4/10)
Pros & Cons
MailerSend
Pros
- Developers can send through a REST API or an SMTP relay, with SDKs and connectors for Laravel, Django, Rails, Symfony, Supabase and Firebase.
- A free tier of 500 emails and a $7 Hobby plan make it cheap to start.
- Capterra reviewers repeatedly praise its responsive support and clear documentation.
- Built-in blocklist and DMARC monitoring help teams protect deliverability.
- Starter and higher plans add an SMS API, and a WhatsApp add-on is available.
Cons
- It is built for transactional email, not full marketing campaign management.
- Reviewers report sudden throttling or account suspensions after bounce or complaint thresholds are crossed.
- Free and Hobby plans keep only one day of activity history.
- SMS is limited to the USA and Canada.
OneSignal
Pros
- A free plan with unlimited push up to 1,000 MAU and 10,000 emails a month makes it cheap to start.
- Push, in-app, email and SMS run from one platform with cross-channel journeys.
- Reviewers on G2 and PeerSpot say the dashboard is easy for non-technical marketers to use.
- A broad integration catalog covers CDPs such as Segment, RudderStack and Hightouch, data warehouses, and analytics tools.
Cons
- PeerSpot reviewers call it expensive for large subscriber bases.
- Free and Growth plans cap segments at 6 and 10, and reporting history at 30 and 90 days.
- SMS pricing is not published and requires a sales conversation.
- Reviewers mention unclear documentation for advanced cases and limited in-app design options.
Not sold on either?
Frequently Asked Questions
OneSignal scores higher on our Marketing criteria: 7.1/10 against 6.9/10 for MailerSend. The largest gap is in Support: 8/10 for MailerSend and 6/10 for OneSignal.
OneSignal costs less for 10 users: free on its Free plan, against about $110/mo on its Professional plan for MailerSend, billed monthly.
Yes, both MailerSend and OneSignal have a free plan.
OneSignal is the better fit for marketing teams: we rate it 7/10 for them, against 4/10 for MailerSend.
