Email delivery service with Message Streams feature for separating transactional and marketing emails into parallel infrastructure to maintain deliverability.

Postmark is a fast and reliable email delivery service for developers since 2010. The Message Streams feature allows separation of transactional and promotional emails into completely separate sending infrastructure to protect deliverability of critical transactional messages. Offers Email API, SMTP service, email templates, inbound email, analytics, and webhooks. Trusted by companies including Paddle, Indie Hackers, Faire, IKEA, and many others with billions of emails delivered.
Fast, reliable email delivery service with message streams
G2 Rating
Starting Price
Free email deliverability monitoring for Gmail
Founded
Starting Price
Free Google service providing email deliverability insights and monitoring specifically for emails sent to Gmail users.
Agile Email Creation Platform with Governed Creation™
Stensul helps enterprise marketing teams create emails faster with built-in brand and compliance controls. The platform enables creation of high-performing emails within minutes using a no-code interface with Governed Creation™ AI controls.
Email deliverability optimization and diagnostics
Founded
Starting Price
Diagnostic and optimization tools for email marketers to improve deliverability, including email validation, inbox placement testing, spam trap monitoring, and blocklist tracking.