Why developers look for Postmark alternatives
Postmark has earned a strong reputation for transactional email delivery. But teams outgrow it when they need:
- Full campaign features — Postmark recently added a Bulk API, but it lacks the campaign builder, segmentation, and scheduling that a dedicated platform offers
- Lower per-email costs at scale — Postmark's tiered pricing starts at $15/10K and gets expensive above 50K/mo
- A single platform — Postmark's Bulk API is basic; teams needing advanced campaigns still need a second provider
- A free tier for development — Postmark's free tier is limited to 100 emails/mo
RelayPost vs Postmark: Feature comparison
| Feature | RelayPost | Postmark |
|---|---|---|
| Transactional email | Yes | Yes |
| Campaign / marketing email | Yes (all plans) | Yes (Bulk API) |
| REST API | Yes | Yes |
| SMTP relay | Yes | Yes |
| DKIM/SPF authentication | Automatic | Automatic |
| Real-time webhooks | Yes | Yes |
| Email templates | Yes | Yes |
| Contact management | Yes | No |
| List segmentation | Yes | No |
| Free tier | 1,000/mo | 100/mo |
| Deliverability dashboard | Public, real-time | Per-server stats |
Pricing comparison
| Volume | RelayPost | Postmark |
|---|---|---|
| 1,000/mo | Free | $1.25 |
| 10,000/mo | $5/mo | $12.50/mo |
| 100,000/mo | $25/mo | ~$85/mo |
| 500,000/mo | Contact us | ~$245/mo |
Postmark uses tiered monthly plans: Basic $15/10K, Pro $16.50/10K, Platform $18/10K with overage rates. RelayPost uses monthly plans with included volume.
When Postmark might be the better choice
Postmark is a solid choice if you:
- Only need transactional email and want a provider laser-focused on that use case
- Value Postmark's long track record and established reputation (owned by ActiveCampaign)
- Prefer pay-per-email pricing with no monthly commitment
- Need Postmark's message streams feature for separating transactional and broadcast traffic
Frequently asked questions
Why switch from Postmark to RelayPost?
Postmark is excellent for transactional email and recently added a Bulk API for broadcasts. However, RelayPost offers a more complete campaign experience with a visual builder, contact segmentation, and scheduling — plus significantly lower pricing at scale ($25/100K vs ~$85/100K).
Does RelayPost match Postmark's deliverability?
RelayPost uses Amazon SES as its delivery infrastructure with automatic DKIM/SPF authentication, dedicated IP options, and real-time deliverability monitoring. Our public deliverability dashboard shows live inbox placement rates.
How does pricing compare to Postmark?
Postmark's Basic plan starts at $15/mo for 10K emails, with Pro at $16.50/10K and Platform at $18/10K. RelayPost's Pro plan is $25/mo for 100K emails ($0.25 per 1,000). For volumes above ~20K emails/mo, RelayPost is significantly cheaper.
Can I use RelayPost for transactional email only?
Absolutely. Campaign support is included but optional. Many teams use RelayPost purely for transactional email — password resets, receipts, notifications — and never touch the campaign builder.
Try transactional + campaign email in one platform
Start with 1,000 free emails/mo. No credit card required.
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