Kong Gateway vs Postmark
Updated June 2026 · A structured head-to-head comparison.
Cloud-native API gateway and management
The verdict
Both Kong Gateway and Postmark are credible api tools tools, and the right pick comes down to your priorities.
Kong Gateway - Cloud-native API gateway and management
Choose Postmark if you'd rather have a higher overall rating (4.7/5). Fast, reliable transactional email.
Kong Gateway vs Postmark: side by side
| Dimension | Kong Gateway | Postmark |
|---|---|---|
| Starting price | Free | Free - $15/mo |
| Free plan | Yes | Yes |
| Pricing model | Open source | Subscription |
| Best for | Developers, Platform Engineers | Developers, Saas |
| Platforms | Self Hosted, Web, Api | Web, Api |
| Rating | 4.4/5 | 4.7/5Winner |
Kong Gateway key facts
- Vendor
- Kong
- Pricing
- Open source - Free
- Free tier
- Yes
- Platforms
- Self Hosted, Web, Api
- Best for
- Developers, Platform Engineers
- Editor rating
- 4.4 / 5
- Founded
- 2009
- Headquarters
- San Francisco, USA
Postmark key facts
- Vendor
- ActiveCampaign
- Pricing
- Subscription - Free - $15/mo
- Free tier
- Yes
- Platforms
- Web, Api
- Best for
- Developers, Saas
- Editor rating
- 4.7 / 5
- Founded
- 2010
- Headquarters
- Wilmington, DE, USA
Frequently asked questions
Is Kong Gateway better than Postmark?
Neither is universally better - Postmark edges ahead on overall rating, but the best choice depends on price, platforms, and your use case. See the side-by-side table above.
Is Kong Gateway or Postmark cheaper?
Kong Gateway is the more affordable of the two to get started, at free. Kong Gateway starts at free; Postmark starts at free - $15/mo.
Can Kong Gateway replace Postmark?
Yes for most teams - both are api tools tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.