VS
OneSignal Email vs Postmark
Two transactional email providers, compared on price, features and ratings — so you can pick fast.
Updated July 2026
The verdict
OneSignal Email starts at Free versus Postmark's $10. OneSignal Email rates higher with developers (4.7 vs 4.6 on G2). Pick based on volume and team — the scorecard below breaks down where each one leads.
By the numbers
How do OneSignal Email and Postmark compare?
Leader highlighted · figures as of July 2026
Entry price · @ 1,000/mo
Free
OneSignal Email
$10
Postmark
Price at scale · @ 50,000/mo
$150
OneSignal Email
$50
Postmark
Free tier
10,000/mo
OneSignal Email
100/mo
Postmark
G2 rating · out of 5
4.7
OneSignal Email
4.6
Postmark
Trustpilot · out of 5
2.6
OneSignal Email
3.8
Postmark
Drag-and-drop editor · visual builder
Yes
OneSignal Email
No
Postmark
Scorecard
Feature by feature, how do they stack up?
| Capability | | |
|---|---|---|
| Pricing | ||
| Starting paid plan | $19/mo | $15/mo |
| Cost per 1k @ 100k | $1.39 | $1.26 |
| Pricing model | Hybrid | Subscription |
| Overage | $1.50 / 1,000 sends | $1.20–$1.80 per 1,000 by plan |
| Deliverability | ||
| Dedicated IP | Plan-gated | Add-on |
| Deliverability tooling | Yes | Yes |
| Automated IP warmup | Yes | No |
| Suppression management | Yes | Yes |
| SPF / DKIM / DMARC | Yes | Yes |
| API & sending | ||
| Transactional API | Yes | Yes |
| Marketing campaigns | Yes | No |
| SMTP relay | — | Yes |
| Inbound routing | — | Yes |
| Dynamic templates | Yes | Yes |
| Batch send | Yes | Yes |
| Scheduled send | Yes | No |
| Developer experience | ||
| Official SDKs | Node.js, Python, Java, Go, PHP, Ruby, C#, Rust | .NET, Java, Node.js, PHP, Python, Ruby, Rails |
| Event webhooks | Yes | Yes |
| Drag-and-drop editor | Yes | No |
| Custom HTML editor | Yes | Yes |
| Email validation | — | No |
| Log retention | — | 45 days |
| Sandbox / test mode | — | Yes |
| Analytics | ||
| Open / click tracking | Yes | Yes |
| Analytics dashboard | Yes | Yes |
| A/B testing | Yes | No |
| Compliance | ||
| EU data residency | — | No |
| SOC 2 | Yes | No |
| HIPAA | BAA | No |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | No |
| Support | ||
| Support channels | Email, Community | Email, Chat |
| 24/7 support | Yes | No |
| Support SLA | Plan-gated | No |
Decision helper
Which should you choose?
Pick OneSignal Email
Pick Postmark
FAQ
Common questions
OneSignal Email starts at Free versus Postmark's $10. Because pricing models differ by tier, the cheaper option depends on your monthly volume — compare the pricing rows in the scorecard above.
Keep comparing
Related comparisons
Why not both?
Use both behind one API.
Route OneSignal Email, Postmark, or both — and switch providers without changing your code. Courier sits in front of every channel.
Pricing, plans and feature availability as of July 2026 and may change. Ratings are aggregated from public review platforms. Postmark is an ActiveCampaign product.
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