Postmark vs Reloop
Postmark
postmarkapp.com
Reloop
reloop.shSide by side
| Figure | Postmark | Reloop |
|---|---|---|
| Price from | $5/mo | $10/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | — |
| API | Yes | — |
| Self-hosted | — | Yes |
| Plans published | 8 | 5 |
| Spec score · Transactional email services | 9.2 (#1) | 8.7 (#10) |
| Spec score · Transactional Email Software | 8.7 (#7) | 8.5 (#14) |
| Dedicated IP option | Yes | Yes |
| Sending methods | Postmark supports REST API, SMTP, and multi-region SMTP routing. | Reloop provides a transactional API and SMTP relay. |
| Free plan | Yes | Yes |
| Monthly send limit | 10000 | 50000 |
| Paid from | 15 | 10 |
| SDK platforms | Official libraries cover Node.js, Python, Rails, Ruby, PHP, and .NET. | First-party SDKs support Node.js, TypeScript, Python, Go, Rust, PHP, and Ruby. |
Plans
Postmark
- FreeFree
- Basic$15 a month
- Pro$16.50 a month
- Platform$18 a month
- Custom activity retention$5 a month
- DMARC monitoring$14 a month
- Dedicated IP$50 a month
- High-volume plansPriced on request
Reloop
- FreeFree
- Pro$10 a month
- Growth$20 a month
- EnterprisePriced on request
- Self-hostedFree
In their own words
Postmark
Postmark delivers and tracks application email as an alternative to SMTP or Sendmail. It separates transactional and broadcast messages into different Message Streams and IP infrastructure. Developers can send through REST API, SMTP, or multi-region SMTP routing, with official libraries for Node.js, Python, Rails, Ruby, PHP, and.NET. Inbound messages can be converted to JSON and sent to a webhook URL. Tracking includes delivery, bounces, spam, opens, and links, with event webhooks. Editable responsive templates cover transactional messages such as password resets, receipts, and invitations. The free Developer plan costs nothing, provides 100 emails per month, permits no overages, and does not expire. Basic starts at $15 a month for 10,000 emails per month; extra emails cost $1.80 per 1,000 and are calculated at the end of the billing cycle. Unused emails do not roll over. Postmark lists API and web access. Its iOS app was sunset in June 2025 and is no longer supported.
Reloop
Reloop is an email delivery platform for transactional and programmatic workflows, available as hosted plans or self-hosted on infrastructure you control. It provides a transactional API and SMTP relay, plus webhook-based inbound routing and dedicated agent inboxes. First-party SDKs support Node.js, TypeScript, Python, Go, Rust, PHP, and Ruby; listed framework integrations include Next.js, Django, Ruby on Rails, and Laravel. Analytics cover delivery, opens, clicks, bounces, complaints, SMTP responses, and reputation. Templates support AI-assisted generation, editing, previews, variables, and version history. Hosted plans retain data for 45 days and set limits for inboxes, webhooks, and custom domains. The Free plan allows 3,000 emails per month and 100 per day; sending pauses when either cap is reached. Pro costs $10 a month for 50,000 emails per month, with overage at $0.50 per 1,000 emails. Self-hosting has no Reloop license cost, though server and delivery costs still apply. Reloop is open source under Apache 2.0 with Reloop Labs use restrictions.