Postmark API vs Sendgrid API
Detailed comparison to help you choose the right API for your project
Both APIs have verified data. Information has been manually fact-checked against official documentation and may be more accurate than automated data collection.
TL;DR Summary
Choose Postmark if:
- You need 5+ official SDKs
- You prefer API Key authentication
- Server API token authentication
- You're in Transactional Email industry
Choose Sendgrid if:
- You need 7+ official SDKs
- You prefer API Key authentication
- API key authentication
- You're in Email Marketing industry
Feature Comparison
| Feature |  Postmark |  Sendgrid |
|---|---|---|
| General Information | ||
| Website | Available | Available |
| API Documentation | Available | Available |
| Founded | 2009 | 2009 |
| Headquarters | Philadelphia, PA (ActiveCampaign subsidiary) | Denver, CO (Twilio subsidiary) |
| API Features | ||
| OpenAPI Specification | ||
| GraphQL Support | ||
| Webhooks | ||
| Sandbox/Test Mode | ||
| SDKs & Libraries | ||
| Total SDKs | 5 SDKs | 7 SDKs |
| JavaScript/Node.js | ||
| Python | ||
| Ruby | ||
| PHP | ||
| Java | ||
| .NET | ||
| Go | ||
| Authentication | ||
| Auth Methods | API Key | API Key |
| OAuth 2.0 | ||
| API Key | ||
| Developer Experience | ||
| GitHub Stars | - | - |
| Stack Overflow Questions | - | - |
| Changelog Available | ||
| Status Page | ||
| Integrations | ||
| Total Integrations | 17 integrations | 114 integrations |
| Zapier Integration | ||
Our Verdict
Both Postmark and Sendgrid are solid choices in their category. Your decision should be based on your specific requirements:
- For more SDK options: Sendgrid offers 7 SDKs
- For more integrations: Sendgrid has 114 integrations
- Authentication: Postmark uses API Key, while Sendgrid uses API Key
We recommend trying both APIs and consulting their official documentation to see which fits your workflow better.
Frequently Asked Questions
What is the main difference between Postmark and Sendgrid?
Postmark focuses on Transactional Email while Sendgridspecializes in Email Marketing. Both offer robust APIs but may differ in specific features, pricing, and integration options.
Which API has better documentation?
Both Postmark and Sendgrid provide API documentation. Sendgrid offers an OpenAPI specification. We recommend reviewing both to see which style suits your team better.
Can I use both Postmark and Sendgrid together?
Yes, many developers use multiple APIs together depending on their needs. You might use Postmark for some features and Sendgrid for others, depending on which offers better support for specific use cases.