Postmark

Developer Plan: Free for up to 100 test emails per month.
Base Plan: $15/month for up to 10,000 emails.
Additional Emails: $1.80 per 1,000 emails beyond the base plan.

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Fast Email Delivery: Postmark ensures emails are delivered in milliseconds, meeting the immediate expectations for transactional messages like password resets or confirmations.
Detailed Email Insights: Track email performance with detailed analytics, including bounces, open rates, and engagement metrics, to improve delivery and user interactions.
Templates with Logic: Create, manage, and customize responsive email templates with dynamic content, enabling seamless personalization for every message.
High Deliverability: By focusing solely on transactional emails, Postmark avoids overlap with marketing emails, reducing spam risks and improving inbox placement.
Inbound Email Parsing: Automate workflows by converting incoming email content into structured data, ideal for ticketing systems or other processes.
Developer-Friendly API and Webhooks: Postmark’s RESTful API and real-time webhooks make it easy to integrate reliable email handling into your applications.

Postmark offers simple and flexible pricing to suit businesses of all sizes. Costs are based on email volume with no hidden fees or extras.