Head-to-head · Email APIs
Mailtrap Email Sending vs OpenSend
Mailtrap Email Sending leads on 1 check, OpenSend on 2, and 5 are even. Who comes out ahead on the 8 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreMailtrap Email Sending · 7.3/10
- Lowest starting priceOpenSend · $10/mo
- Free planboth
- Most featuresMailtrap Email Sending · 5 of 5
Mailtrap Email Sending scores higher on our rubric for email apis: 7.3 against 6.8 out of 10; our editors rank them #16 and #19.
OpenSend is cheaper to start at $10/mo against $15/mo. OpenSend leads on monthly send limit: 15000 /mo versus 10000 /mo. Mailtrap Email Sending offers smtp relay; OpenSend doesn't.
Mailtrap Email Sending is the better fit for developers wanting SDKs and integration breadth. OpenSend is the better fit for open-source teams wanting a modern email stack.
- Mailtrap Email Sending fits best
Developers wanting SDKs and integration breadth
- OpenSend fits best
Open-source teams wanting a modern email stack
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Side by side
| Feature | Mailtrap Email Sending 7.3/10 Visit ↗ | OpenSend 6.8/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 7.3 | 6.8 |
| Ranking | #16 in Email APIs | #19 in Email APIs |
| Best for | Developers wanting SDKs and integration breadth | Open-source teams wanting a modern email stack |
| Pricing model | Free plan + paid | Free plan + paid |
| Starting price | $15/mo | $10/mo (best) |
| Free plan | ✓ | ✓ |
| Free trial | — | — |
| Deployment | Cloud | Cloud, Self-hosted |
| Platforms | Web | Web |
| Integrations | 13 integrations | 8 integrations |
| Features Mailtrap Email Sending 5/5 · OpenSend 4/5 | ||
| Inbound email | ✓ | ✓ |
| Delivery event webhooks | ✓ | ✓ |
| SMTP relay | ✓ (best) | — |
| Email templates | ✓ | ✓ |
| Dedicated IP option | ✓ | ✓ |
| Specs | ||
| Monthly send limit | 10000 /mo | 15000 /mo (best) |
| Our review | ||
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| Our verdict | Mailtrap Email Sending is an email delivery service for developers and product teams sending transactional or bulk messages. It combines a REST API with an SMTP relay, reusable HTML and text templates, delivery analytics, suppression… Read the review → |
OpenSend is email infrastructure for developers and teams managing transactional email, broadcasts, contacts, templates, automations, inbound messages, and delivery events. It supports web access, an API, and self-hosted deployment. Its… Read the review → |
Strengths and trade-offs
Mailtrap Email Sending — where it wins
- REST API, SMTP relay, and inbound email support
- Official SDKs for six programming languages
- SPF, DKIM, DMARC, webhooks, analytics, and suppressions
Where it doesn't
- Basic has no dedicated IP
- Free includes only 3 days of email logs
- Sending and receiving share the monthly email limit
OpenSend — where it wins
- Self-hosting with Docker Compose, AWS SES, and Postgres
- Resend-compatible REST API with TypeScript SDK and React Email support
- Webhooks, inbound routes, automations, templates, and domain authentication
Where it doesn't
- SMTP relay is not supplied
- Self-hosting requires AWS SES and Postgres
- The Free plan allows 500 API and broadcast emails monthly
- Mailtrap Email Sending7.3/10 · Free plan
A developer-focused email API with SDKs, SMTP, inbound mail, and detailed event webhooks.
Visit MailtrapFull verdict → - OpenSend6.8/10 · Free plan
A flexible email stack for developers, with self-hosting and a Resend-compatible API.
Visit OpenSendFull verdict →
All email APIs comparisons → · Full ranking →
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update