Postmark
postmarkapp.comBuild Difficulty: 5/5
Build a working replacement in a weekend with AI tools
The email delivery service that people actually like
How to Replace PostmarkOverview
Features
37 features across 14 categories
API(2)
Send emails via REST API with support for multiple programming languages
API access to delivery statistics
Analytics(4)
Comprehensive email analytics including delivery, bounce, spam, and open rates
Track when recipients open emails
Detailed bounce data to identify and troubleshoot delivery issues
Monitor and track email links to improve engagement
Data Management(1)
Full message retention with configurable data retention from 45 to 365 days
Developer Tools(3)
Interactive API documentation
Guides for migrating from SendGrid, Mailgun, Amazon SES, SparkPost, Mailchimp, and other providers
Official libraries for Rails, Ruby, .NET, PHP, Node.js and other languages
Email Configuration(1)
Configure custom sending domains for emails
Email Design(1)
Responsive email templates for transactional emails with template editor and import tools
Email Management(5)
Automatically suppress bounced and complained emails
Tag emails for better organization and filtering
Convert inbound emails into JSON objects and post to webhooks
Separate sending infrastructure for transactional and promotional emails to protect deliverability
Manage email suppression lists
Email Sending(3)
Send emails in batches
Send bulk promotional and broadcast emails
Send emails using SMTP protocol
Email Types(1)
Send transactional emails like password resets, notifications, and welcome messages
Infrastructure(4)
Fully managed dedicated IPs for high-volume senders
Shared IPs that are carefully vetted and maintained for high deliverability
SMTP routing across multiple regions for optimal delivery
Support for multiple sending servers
Integration(2)
Receive webhooks for email delivery events
New Model Context Protocol (MCP) server for integration with AI tools
Security(8)
Granular controls for API token permissions
Protection against DDoS attacks
Email authentication standards to improve deliverability
Monitor DMARC authentication issues and identify unauthorized senders
Regular penetration testing for security
Secure endpoints for webhook delivery
Secure accounts with two-factor authentication
Control user access with role-based permissions
Testing(1)
Test email integration without actually sending emails
Pricing
Free
- ✓100 emails/month
- ✓REST API
- ✓SMTP
- ✓Transactional email
- ✓Email templates
- ✓Sandbox mode
- ✓Dynamic API documentation
- ✓Official SDKs
- ✓Up to 10 custom domains
- ✓Up to 6 users
- ✓45-day data retention
- ✓Email open and link tracking
- ✓Delivery and bounce analytics
- ✓DKIM, SPF, DMARC authentication
- ✓Responsive email templates
- ✓Event webhooks
- ✓Two-factor authentication
- ✓GDPR compliance
- ✓Up to 10 servers
- ✓Up to 15 message streams
Basic
- ✓10,000 emails/month included
- ✓$1.80 per 1,000 extra emails
- ✓REST API
- ✓SMTP
- ✓Transactional email
- ✓Bulk email API
- ✓Unlimited emails/day
- ✓Industry-leading deliverability
- ✓45-day data retention
- ✓5 custom sending domains
- ✓Unlimited emails/day
- ✓Detailed analytics and insights
- ✓Email templates
- ✓Email open and link tracking
- ✓Custom tagging
- ✓Batch sending
- ✓Event webhooks
- ✓Official SDKs
- ✓Sandbox mode
- ✓User roles
- ✓Two-factor authentication
- ✓API permission controls
- ✓GDPR compliance
- ✓Penetration testing
- ✓DDoS protection
- ✓Up to 5 servers
- ✓Up to 4 users
Pro
Popular- ✓10,000 emails/month included
- ✓$1.30 per 1,000 extra emails
- ✓REST API
- ✓SMTP
- ✓Multi-region routing
- ✓Transactional email
- ✓Bulk email API
- ✓Unlimited emails/day
- ✓Industry-leading deliverability
- ✓Customizable data retention up to 365 days
- ✓10 custom sending domains
- ✓Inbound email processing
- ✓Detailed analytics and insights
- ✓Email templates
- ✓Email open and link tracking
- ✓Custom tagging
- ✓Granular bounce data
- ✓Batch sending
- ✓Event webhooks
- ✓Official SDKs
- ✓Sandbox mode
- ✓User roles
- ✓Two-factor authentication
- ✓API permission controls
- ✓GDPR compliance
- ✓Penetration testing
- ✓DDoS protection
- ✓Stats API
- ✓Up to 10 servers
- ✓Up to 6 users
- ✓Up to 30 message streams
Platform
- ✓10,000 emails/month included
- ✓$1.20 per 1,000 extra emails
- ✓REST API
- ✓SMTP
- ✓Multi-region routing
- ✓Transactional email
- ✓Bulk email API
- ✓Unlimited emails/day
- ✓Industry-leading deliverability
- ✓Customizable data retention up to 365 days
- ✓Unlimited custom sending domains
- ✓Inbound email processing
- ✓Detailed analytics and insights
- ✓Email templates
- ✓Email open and link tracking
- ✓Custom tagging
- ✓Granular bounce data
- ✓Batch sending
- ✓Event webhooks
- ✓Official SDKs
- ✓Sandbox mode
- ✓User roles
- ✓Two-factor authentication
- ✓API permission controls
- ✓GDPR compliance
- ✓Penetration testing
- ✓DDoS protection
- ✓Stats API
- ✓Unlimited servers
- ✓Unlimited users
- ✓Unlimited message streams
Custom
- ✓High-volume email pricing
- ✓Custom terms for 1.5M+ emails/month
Cost Calculator
Keep Paying Postmark
Build It Yourself
Total Cost Comparison
DIY hosting estimate based on Vercel + Supabase free/pro tiers (~$20/mo). Build time estimated from 37 features at very easy complexity.
Build vs Buy
Should you build a Postmark alternative or buy the subscription? Estimate based on 37 features.
Buy Postmark
Better ValueBuild Your Own
Buying Postmark saves ~$31,560 over 3 years vs building.
Estimates based on 37 features and a BuildScore of 5/5. Actual costs vary.
Integrations
16 known integrations