Postmark

Fast, reliable transactional email with industry-leading deliverability

From $0/mo

About Postmark

Postmark has built its reputation on being the most reliable transactional email provider, with average delivery times under 10 seconds. The platform separates transactional and broadcast email streams, ensuring your critical user emails never get impacted by marketing campaigns. Postmark provides detailed delivery analytics, suppression management, and a robust inbound email processing feature. Its message streams architecture lets teams manage different email types with distinct sending reputations. The company is owned by ActiveCampaign but operates independently with a strong focus on developer needs. Postmark's documentation and support are consistently praised as among the best in the industry.

Key Features

Message Streams (transactional + broadcast separation)

Sub-10-second average delivery time

Inbound email processing

Click and open tracking

Bounce and spam complaint management

Email templates with Mustache syntax

45-day full-content message history

Pros & Cons

Pros

• Consistently fastest delivery times in the industry
• Message streams protect transactional reputation from bulk sends
• Inbound email processing is a rare and useful feature
• Excellent customer support with real humans

Cons

• No free tier — relatively expensive for low-volume senders
• Broadcast/newsletter features less powerful than dedicated tools
• Pricing jumps significantly at higher volumes

Best For

SaaS companies where email delivery speed is critical Teams sending both transactional and marketing emails Enterprises needing reliable inbound email handling Developers who value support quality