Postmark Account-level API API alternatives
12 other email APIs compared on authentication, HTTPS, CORS and documented endpoints.
| API | Auth | HTTPS | CORS | Endpoints |
|---|---|---|---|---|
| Postmark Account-level API | No auth | Yes | Unknown | 23 |
| Sendgrid | API key | Yes | Unknown | 334 |
| Sendinblue | API key | Yes | Yes | — |
| mail.tm | No auth | Yes | Yes | — |
| Mandrill | No auth | Yes | Unknown | 90 |
| Guerrilla Mail | No auth | Yes | Unknown | — |
| ImprovMX | API key | Yes | Unknown | — |
| Mailtrap | API key | Yes | Unknown | — |
| Postmark API | No auth | Yes | Unknown | 43 |
| DropMail | No auth | Yes | Unknown | — |
| Kickbox | No auth | Yes | Yes | — |
| Email Validation | API key | Yes | Yes | — |
| Resend | API key | Yes | Yes | — |
Sendgrid
EmailA cloud-based SMTP provider that allows you to send emails without having to maintain email servers
Sendinblue
EmailA service that provides solutions relating to marketing and/or transactional email and/or SMS
mail.tm
EmailTemporary Email Service
Mandrill
EmailMandrill is a reliable, scalable, and secure delivery API for transactional emails from websites and applications. It's ideal for sending data-driven transactional emails, including targeted e-commerce and personalized one-to-one messages.
Guerrilla Mail
EmailDisposable temporary Email addresses
ImprovMX
EmailAPI for free email forwarding service
Mailtrap
EmailEmail API and SMTP for sending transactional and bulk emails, with email testing sandbox for safe development
Postmark API
EmailPostmark makes sending and receiving email incredibly easy.
DropMail
EmailGraphQL API for creating and managing ephemeral e-mail inboxes
Kickbox
EmailEmail verification API
Email Validation
EmailValidate email addresses for deliverability and spam
Resend
EmailEmail API for developers