toolgrep / Email & messaging / Postmark
Alternatives to Postmark
Postmark: Transactional and bulk email delivery service with REST API and SMTP support. 8 products similar to Postmark, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 8 of 8 have an API, 4 of 8 offer an MCP server.
- Mailtrap
Email delivery platform for developer and product teams: Email API/SMTP sending, email testing sandbox, and email marketing.
- MailerSend
Transactional email, SMS, and WhatsApp delivery service with a REST API and SMTP relay
- Maileroo
SMTP relay and email API for transactional and marketing email
- Resend
Email API for developers
- SendStreak
Email middleware that wraps around your existing email backend
- Anypost
Transactional and broadcast email service
- SMTPfast
Transactional email API for developers, built on AWS SES
- EmailLabs
Cloud-based SMTP service and email API for sending and tracking transactional and marketing emails
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| Postmark | Freemium · from $15.00/mo | yes | yes | no | yes | no |
| Mailtrap | Freemium · from $15 | yes | yes | yes | yes | no |
| MailerSend | Freemium | yes | yes | yes | yes | no |
| Maileroo | Freemium · from $10/mo (25,000 emails); free tier with 3,000 emails/month | yes | yes | no | yes | no |
| Resend | Freemium | yes | yes | yes | yes | no |
| SendStreak | Usage-based · from €2 per 10,000 emails (excl. VAT); 100 emails/day free | yes | yes | no | yes | no |
| Anypost | Freemium · from $0 (Free: 3,000 emails/month); paid plans from $20/mo | yes | yes | no | yes | no |
| SMTPfast | Freemium · from $0 (free tier, 3,000 emails/month); paid plans from $9/month; overflow credits at $0.001 per email | yes | yes | yes | yes | — |
| EmailLabs | Freemium · from 0 PLN/month (Startup plan, up to 9,000 emails/month, 300 emails/day limit); paid plans from 99 PLN/month (Essential 30, up to 100,000 emails/month) | yes | yes | no | yes | no |
Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.
API
curl https://toolgrep.com/api/products/postmark/alternatives