PostStack
EU-hosted API for transactional and marketing emails with contacts, broadcasts, and analytics.
Read docs Updated 2026-06-18
What is PostStack?
PostStack is an EU-hosted email API for transactional and marketing emails that includes contacts, broadcasts, and analytics.
It is useful for applications and services requiring EU data residency with API key access for email operations.
What you can build with PostStack
Send transactional emails
Trigger order confirmations, password resets, and notifications from backend services using the API key-authenticated endpoints.
Run marketing broadcasts
Upload contact lists and schedule bulk campaigns with built-in segmentation and delivery tracking.
Monitor email performance
Pull analytics data on open rates, clicks, and bounces to refine campaigns and report on engagement metrics.
Get started with PostStack
- 1Sign up on the PostStack website and create an account
- 2Generate an API key from the dashboard
- 3Review the endpoint documentation for sending and contacts
- 4Make an HTTPS POST request with the API key in the header
- 5Test delivery and review analytics in the dashboard
PostStack: pros & cons
Pros
- +EU data residency for privacy compliance
- +Single API key authentication keeps integration simple
- +Built-in contacts, broadcasts, and analytics reduce need for extra tools
Cons
- –Focused only on email, no SMS or push support
- –EU hosting may add latency for users outside Europe
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An EU-hosted email API for sending transactional messages and marketing broadcasts, including contact management and analytics.
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