Side by side
Expo Push Service vs Postmark
Both stand on notification infrastructure software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan AndroidiPhoneWeb
Visit Expo Push Service 
Free plan APIWeb
Postmark offers application email delivery, tracking, and inbound processing with a permanent but limited free tier. Compare paid-plan email allowances and overage rates, and account for the stated message size and recipient limits.
Visit PostmarkThe facts
| Expo Push Service | Postmark | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Android, iPhone, Web | API, Web |
| Lowest paid plan | Not published | See the plans |
| Plans published | None | 8 |
| Maker | Not published | Postmark |
| Website | expo.dev | postmarkapp.com |
| On notification infrastructure software | #7 of 15 | #3 of 15 |
Expo Push Service: what it does well
Postmark: what it does well
- Free plan never expires and allows 100 emails monthly.
- Supports REST API, SMTP, and multi-region SMTP routing.
- Separates transactional and broadcast email infrastructure.
- Inbound email can be delivered to a webhook as JSON.
- Customer success support is included without a premium fee.
What to know first
- The free plan does not allow overages.
- Unused emails do not carry into the next billing period.
- Annual plans are not currently offered.
- Email messages are limited to 10 MB and 50 recipients.
Alternatives to Expo Push Service Alternatives to Postmark The whole list