PostageApp
Simple transactional email API for developers who want reliable delivery without the hassle
Founded
2009
Starting Price
Contact
Category
Communication
Last updated April 27, 2026
About PostageApp
PostageApp is a Canadian-owned transactional email service provider that helps developers design, send, and analyze emails through a clean JSON-based API. It offers hosted email templates that can be updated without redeploying your application, message variables for personalization, and detailed analytics. PostageApp supports Ruby, Python, PHP, Node.js, and other languages with official libraries, and provides DKIM, SPF, and ISP feedback loop compliance out of the box.
Pros & Cons
Pros
- Extremely simple API designed by developers for developers
- Hosted templates allow updates without code redeployment
- Drop-in Rails ActionMailer replacement for Ruby apps
- Strong deliverability with DKIM, SPF, and feedback loop compliance
- Canadian-owned with data centers in Toronto and Montreal
Key Features
JSON-Based Email API
Simple REST API using JSON payloads to send transactional emails via HTTP POST requests
Hosted Email Templates
Design and manage HTML/CSS email templates in the cloud — update them without redeploying your application
Message Variables
Personalize emails with dynamic variables for recipient-specific content and customization
Email Analytics
Track delivery rates, opens, clicks, and bounces with detailed reporting dashboards
DKIM & SPF Compliance
Built-in email authentication with DKIM signing and SPF alignment for optimal deliverability
ISP Feedback Loops
Full participation in ISP feedback loops to maintain sender reputation and reduce spam complaints
Multi-Language SDKs
Official libraries for Ruby, Python, PHP, Node.js, and other languages for quick integration
Pricing
Shared
Contact/month
- Shared IP
- Unlimited sending
- Email templates
- Analytics dashboard
- DKIM & SPF
Best For
Transactional Email for SaaS Apps
Send password resets, account confirmations, and notification emails through a simple API integration
Ruby on Rails Email Delivery
Replace ActionMailer with PostageApp's drop-in gem for reliable transactional email in Rails applications
MVP Email Infrastructure
Get email delivery set up quickly with shared plans and hosted templates for early-stage applications
E-Commerce Order Notifications
Send order confirmations, shipping updates, and receipt emails with personalized content variables
