SendByte vs Postmark
Postmark is the reference point for transactional deliverability, and it keeps transactional and broadcast mail in separate message streams to protect it. SendByte keeps the same separation between your receipts and your campaigns, and prices it in Naira.
The short answer
If transactional deliverability is your single deciding factor and you are fine paying in US dollars, Postmark is excellent. If you want the same separation of transactional and marketing mail with a fixed Naira price, SendByte fits.
At a glance
| Detail | SendByte | Postmark |
|---|---|---|
| Billing currency | Billing currency Naira, fixed | Billing currency US dollars |
| Free plan | Free plan 3,000 emails a month, permanent | Free plan 100 emails a month, no overage |
| Paid plans | Paid plans From ₦2,000 a month for 6,000 emails. ₦15,000 for 50,000. | Paid plans Basic from $15 a month for 10,000 emails, about $55 for 50,000. Extra emails from $1.20 to $1.80 per 1,000. |
Postmark figures were read from its official pricing page on 30 September 2026 and may have changed since. For your own volume in Naira, run the cost calculator.
Where each one is the better call
Choose SendByte for
- Fixed Naira pricing on your normal card through Paystack.
- A free plan of 3,000 emails a month, against Postmark’s 100.
- Marketing sent on a separate reputation from your receipts and passcodes.
- A free public audit of any domain’s SPF, DKIM, DMARC and MX.
Choose Postmark for
- A long record of strong transactional deliverability.
- Separate message streams for transactional and broadcast mail.
- Detailed analytics and message history.
- Fast, knowledgeable human support.
Pick Postmark when: Teams whose single highest priority is transactional deliverability and who are comfortable paying in US dollars.
Switching from Postmark?
Keep both providers in your SPF record while you switch, then move traffic across once delivery looks healthy. The migration planner writes the exact records and code change for your domain.
Questions
Does SendByte separate transactional and marketing mail like Postmark?
Yes. Campaigns go out on a separate sending reputation from your transactional mail, so a newsletter that collects complaints cannot drag down the delivery of your receipts and passcodes.
Is SendByte a Postmark alternative for Nigeria?
Yes. It offers a clean API, an SMTP relay and typed SDKs, priced in Naira and paid on your normal card.
How do the free plans compare?
As of September 2026, Postmark’s free developer plan includes 100 emails a month. SendByte’s free plan includes 3,000 emails a month with no card required.